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2.2 Growing pains

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Old 11-03-2007, 10:48 AM   #1
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2.2 Growing pains

Chevy’s Growing Pains: Version 2.2



2.2L Evolution
The Chevy 2.2L/134 cid is the latest in a family of engines that had its beginnings in the 1982 Cavalier, Chevy’s new "J" car that came with an all new 1.8L/112 cid engine. Unfortunately, this four cylinder, pushrod motor didn’t have nearly enough horsepower, so Buick, Oldsmobile and Pontiac all opted for the 1.8L SOHC Opel engine from Brazil for most of their "J" cars, and Chevy promptly made its new engine into a 2.0L/121 cid that delivered more power in 1983.

The 2.0L was upgraded in 1987 with the addition of an aluminum head and crank-triggered spark along with a longer rod and a shorter, lighter piston that reduced noise, vibration and harshness (NVH). GM called it one of its "Generation II" engines.

In 1990, the stroke was increased from 3.15" to 3.46" to make the 2.0L into a 2.2L. Since then, the block has been revised four times, and the head has been changed three times.

Beginning in 1994, when the 2.2L became the base engine in the small pickups, there were some more subtle differences, too, so there are a total of seven different long blocks and plenty of opportunities to mess up if you don’t know where to look. With all of that in mind, let’s go back to 1990 when it all began and take a closer look at the 2.2L, piece by piece.


Photo 1
The 1994-’95 blocks had two additional bosses on the right side and three on the left. The two big ones on each side were used for the RWD motor mounts.

Starting Blocks
All of the 2.2L blocks look pretty similar, but there were some significant differences from year to year, so we have identified the blocks that were originally used each year along with the important features that made them unique.

Some of them can be interchanged if they have the right features, but there are usually plenty of cores available. It’s a good idea to stay with the original castings whenever possible to avoid any problems in the field.

1990-‘91: The original engine used an offset filter adapter for the cars that came with automatic transmissions, so most of the oil filter mounts had three small bolt holes located around the perimeter of the machined oil filter pad.

These blocks were either a 10103566 or a 10068554 casting, but we have seen the 10068554 block without the three holes around the pad.

Rebuilders should use only the drilled blocks for ’90 and ’91 to ensure that the engine fits every application.

Some of the later castings are drilled for the offset adapter, so they can be used for these early FWD applications, too.

1992-‘93: The oil filter screwed directly onto a stud in the middle of the pad for both sticks and automatics in 1992, so the three holes for the offset adapter were no longer drilled and tapped.

The 10156012 and the 10156048 castings were used in ’92 and ’93. The earlier 10068554 casting without the three holes can also be used, but these undrilled, flat tappet blocks were unique to the 1992-‘93 cars so they can’t be used for any other application.

1994-‘95: There were two major changes made to the 2.2L block in 1994. The new "Generation II" engine came with a roller cam, so two of the cast supports that tied the inner and outer walls of the block together on the pushrod side were machined flat about .390" below the deck surface. They were then drilled and tapped for the bolts that held the two shallow plastic lifter guides.

Five more bolt bosses were also added on the block: two on the left and three on the right.

The two big ones on both sides were there for the RWD motor mounts that were needed because the 2.2L Chevy replaced the 2.5L Pontiac as the base engine for the S-10 pickups in ‘94.

Look for a 10215666, a 24575396 or a 10141927 casting. All of these later blocks can be used for the 1990-‘91 FWD cars as long as the three holes for the offset filter adapter are drilled (some are).

They can also be used for all of the 1992-‘93 FWD cars if you are willing to trade a late core for an early one.

1996: Chevy switched to sequential port fuel injection on the 2.2L in ‘96, so there is a large open hole with a small threaded one beside it on the passenger side for the cam position sensor that was used to sequence the fuel injectors correctly. The 1996 block, c/n 24574521, still had the shallow (0.390") mounting pads for the early lifter guides, but it can be used up through 1999 as long as the matching lifter guides are provided with the engine.

1997-‘99: The plastic lifter guide was much thicker in the middle beginning in 1997, so the mounting pads in the block were moved down 0.400".

They were now 0.790" below the deck surface. This block, c/n 24576035, also has one more small bolt boss on the passenger side, but we have never seen it drilled and tapped, so we have chosen to ignore it for now.

The location of the tang on the #3 main bearing was moved in ’98, too, so rebuilders will have to notch the block or grind off the tang on the earlier aftermarket bearings that are available so they will fit the block.

This casting can be used in a ‘96 car or truck as long as the correct lifter guides are installed in the engine.


Photo 2
The 1996 and later blocks have two more holes on the passenger side for the cam position sensor that was needed for sequential fuel injection. Be sure to notice the second sender hole (arrow) that must be drilled and tapped for the oil pressure gauge on all of the blocks, too.


Photo 3
The notched ring on the cam triggers the cam position sensor so the computer can sequence the fuel injectors correctly.


Getting Cranky
There have only been two crank castings used in the 2.2L engines, but one of them comes in two flavors, so it must be visually identified.

1990-‘95: These engines all used the 1237 casting.

1996-‘97: These engines came with the 4618 casting that is virtually identical to the earlier 1237. They are both interchangeable.

1998-‘99: These engines still used the 4618 casting, but the timing notches were advanced by about 0.450", so the later crank can’t be interchanged with either of the earlier ones.

It’s easy to tell the difference between the two 4618 cranks when you see them side by side.

With both cranks facing you and the keyways at 12 o’clock, note the location of the notch at the top of each reluctor wheel. If the right edge of the notch is about .500" to the left of the casting seam and located around 11 o’clock, it’s the early, retarded crank.

If the right edge of the notch is right next to the casting seam and nearly straight up at 12 o’clock, it’s the later, advanced crank that came out in 1998. Don’t mix them up, or you will have a comeback.


Photo 4
The 4618 crank with advanced timing that was introduced in 1998 is on the left. Note the location of the crank trigger notches compared to casting seam on both cranks.


Photo 5
The four pistons used in the 2.2L are, from left to right, the 2724 with the wide pin boss (‘90-’91), the 2727 with the narrow pin boss, thicker head and higher compression height (1992-’93), the 2728 with a slightly smaller dish (1994-’97) and the 1998-’99 OEM version with the shallow dish.


Quad Pistons
There have been four different pistons used in this engine: From 1990-’91, the original piston was a Mahle 2724. It had the wide pin boss for the wide rod.

1992-‘93: Both the piston and rod were changed in 1992. The pin bosses on the Mahle 2727 were moved 3.0 mm closer together so the small end of the rod was narrowed by about 0.120".

The compression height was increased by 0.1mm, and the crown of the piston was thicker to accommodate the 15% increase in horsepower.

1994-‘97: The piston was modified again in 1994. The Mahle 2728 had a slightly smaller bowl (19.4 cc vs 21.8 cc) that increased the compression ratio for the new roller cam engine, and it weighed 16 grams less (312 grams vs 328 grams) which helped reduce NVH.

This revised, full round piston was replaced by an even lighter, slipper skirt design in late 1994 or early 1995.

1998-‘99: The 1998 piston had a smaller dish, only .075" deep, to go with the new heart-shaped chamber.

CAMeo Appearance
There have been five cams used in the Chevy 134, two flat tappet cams that are interchangeable and three roller cams that are not interchangeable.

1990-‘93: The original flat tappet cam was a p/n 14090095. It was replaced by a p/n 10103699 in 1992.

The specifications for both are very similar, so they can be interchanged in a remanufactured engine.

1994-‘95: The "enhanced" engine came with a hollow roller cam that had pressed-on lobes.

1996-‘97: The 1996 engine was equipped with sequential fuel injection, so it had a notched ring for the cam position sensor located behind the #3 journal.

The specifications stayed the same, so it can be used to replace the 10184912 that came in the 1994-‘95 engines, but the 10184912 can’t be used in the 1996 and ‘97 engines because it doesn’t have the notched ring for the cam position sensor.

1998-‘99: The cam specs were changed substantially in 1998 "to improve midrange torque when combined with the new head and intake manifold," so this cam can’t be interchanged with any other roller cam. It’s p/n 24574779 that has the notched ring behind the third journal and "4779" imprinted on the barrel behind the second lobe.

Heads Up
There have been three different head castings used on the Chevy 2.2L, along with a couple of variations that can cause some confusion. Here’s what you need to look out for:

1990-’91: The original casting for the 2.2L was a carryover from the 1987-’89 2.0L. It was a 10045049 or a 14081738 casting that had an open crossover in the front of the head with threaded holes on both sides.

The purpose of this crossover was always a mystery to us because it wasn’t connected directly to the cooling system. After seeing cores with a pipe nipple in one side and a plug in the other side, and then finding a short passage that angled off to the face of the head on the intake side, we finally realized that it provides heat to the base of the throttle body through a small, rectangular passage in the intake manifold.

Some of these castings had a small 1/8" x 27 threaded hole over the #1 exhaust port that was used for an "engine metal temp sender" on the 2.0L engines.

Chevy never used this sender with any of the 2.2L engines, so the hole must be plugged if it’s drilled and tapped.


Photo 6
"Eyebrows" were added to the intake ports for port fuel injection beginning in 1992.


1992-’93: There were a number of changes to the head in 1992. The intake ports were arched on top to make room for the injectors, the intake valves were enlarged from 1.693" to 1.732" and conical springs with smaller retainers were used for the first time. Most of the valves in 1992-‘93 heads on them had 8.0 mm stems, but there may be some of these engines with service replacement heads that have 7.0 mm stems.

It really doesn’t matter which one the customer has when you’re selling a long block because the valves are identical otherwise.

All of these heads were 10112391 castings. The two holes for the crossover passage may or may not be drilled and tapped, but it doesn’t matter because the intake manifold for the port injected engines isn’t heated. However, the big hole in the front of the head for the water outlet should always be plugged because the water outlet housing is on the back of the head on all of the FWD engines.

1994-’97: The same casting that was used in 1992-‘93 was used from 1994-’97, but it had two additional bolt holes drilled diagonally in the front of the head for the RWD water outlet housing and it had 7.0 mm valves. Look for a 10112391 head with an "S" on the end of the casting number. The "S" can stand for three different things, depending on where you look.

The "S" means "standard" on the S-10 pickups, according to the truck microfiche, because all of the truck heads came standard with 7.0 mm stems.

The "J" and "L" cars had a first and second design head from 1993-’97 according to the car microfiche, so the "S" indicates that the head is the "second design" version with 7.0 mm valve stems.

The "S" heads were used as replacements for any 1992-’97 vehicle, so the "S" also identifies the later 7.0 mm head as a "service" part according to GM.

Some of the second design heads were used as service replacements on 1992-’93 cars, so the car microfiche spells out the difference between the first and second design heads to make sure the customer gets the right valves when buying them over the counter.

What really matters, though, is that the 10112391S is not a special head for certain applications as some rebuilders have believed. It actually fits all of the 1992-’97 FWD cars plus all of the 1994-’97 RWD applications, as long as the two diagonal holes are drilled in front of the head for the water outlet housing used on the RWD trucks.

Remember that the coolant crossover isn’t used anymore, so the holes don’t have to be drilled and tapped; and, they don’t have to be plugged if they are drilled and tapped.


Photo 7
The exhaust ports on the 1998-’99 heads are noticeably smaller than they were on the earlier heads.


Photo 8
The intake ports were squared off and came to more of a point (left) beginning in 1998.

1998-’99: There were several major changes made to the head in 1998. The combustion chambers were heart-shaped, the intake ports were squared-off and came to more of a point at the top, the exhaust ports were noticeably smaller (1.120") and the rocker pedestals were notched to hold the roller rockers in place. The crossover passage in the front was eliminated, and the EGR passage was revamped. It’s an all new casting (c/n 24575507) that was used up through 1999.


Photo 9
The chamber in the 1998-’99 head (right) is heart-shaped instead of the oval as it was on all of the earlier heads.


Photo 10
The head gasket for the 1990-’97 FWD cars (top) has two large holes on the front along with more and bigger holes between all of the cylinders. The gasket that was used for the 1994-’99 RWD and 1998-’99 FWD engines (bottom) restricts the flow in the front, but it has one additional hole in the back.


Gasket Differences
There have been two different head gaskets used on the 2.2L engine. All of the 1990-’97 FWD engines came with the same gasket that was originally used on the 1987-’89 aluminum-headed 2.0L engines.

The RWD engines used another head gasket that restricted the flow of coolant in the front and limited the flow between the cylinders. This gasket directs the majority of the coolant up into the back of the head so it flows forward and cools the entire head before it exits through the front-mounted water outlet.

Beginning in 1998, the FWD engines began using the same head gasket that had been used on the RWD engines since 1994.

This worked well because GM reversed the direction of the coolant in the FWD heads so it flowed in the same direction as it did in the RWD engines. They accomplished this by eliminating the water outlet on the back of the FWD head and installing a long "radiator inlet pipe" that went from the front of the head to the back of the engine where it was connected to the radiator.

Timing is Everything
The OEM timing chain tensioner for the 2.2L is rather unique. The chain is tensioned by a bi-metal spring that takes a permanent set the first time it’s heated by hot engine oil. We have seen some aftermarket tensioners that will hold tension as long as the oil is hot, but they relax and lose their tension each time the engine cools off.

This allows the chain to slap on the plastic guides every time the engine is started cold and usually leads to a premature failure of the tensioner and chain. If you have problems with the timing components on this engine, check the tensioner first.

Under Pressure
Some of the Cavaliers and S-10 pickups came with a real oil pressure gauge in addition to the idiot light, so they had to have two oil pressure senders. The first sender that turns the idiot light on and off also turns the electric fuel pump off in case of an accident. The second sender provides a variable signal to the oil gauge.

You will need to drill and tap the hole for the second sender in the flat pad that’s located about three fourths of the way back and midway up the block on the passenger side if it’s not already there. Be sure to center the hole carefully, because the casting will split when the sender or a plug is installed if it’s even slightly off to one side.


Photo 11
The 1990-’93 engine had a bigger oil pump with the longer gears (right). Beginning in 1994, a smaller pump with shorter gears (left) was used on the 2.2L.


Pump it Up
There have been two oil pumps used on the 2.2L. The first pump that was used from 1990-’93 came with a deeper housing and longer gears so it pumped more volume than the later, shorter design that was used from 1994 on up. Both pumps are interchangeable, so some rebuilders have standardized on the later pump for everything, even though it has slightly less volume and a lower pressure relief valve (64 lbs. vs 80 lbs.).

Popularity Contest
That’s the story on the 2.2L Chevy. It’s been the base engine in many popular GM cars along with thousands of S-10 pickups over the last 10 years, so there are over 3 million of them out there just waiting for their turn to be remanufactured or enhanced for more performance.
Old 01-08-2008, 10:28 PM   #2
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Re: 2.2 Growing pains

Is there any information on the 2000-2003 2.2 available?
Old 01-09-2008, 04:47 PM   #3
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Re: 2.2 Growing pains

wow thats a ton of info and i never had any idea there were so many differences over the years it was produced
Old 01-09-2008, 05:46 PM   #4
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Re: 2.2 Growing pains

Quote: Originally Posted by tg900
Is there any information on the 2000-2003 2.2 available?
its the same as the 98+ motor, some had flex fuel though
Old 01-09-2008, 05:47 PM   #5
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Re: 2.2 Growing pains

Quote: Originally Posted by 94S10asm
wow thats a ton of info and i never had any idea there were so many differences over the years it was produced
yep, its little stuff but there were some changes
Old 01-10-2008, 01:35 AM   #6
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Re: 2.2 Growing pains

Damn thats pretty sweet.
Old 01-11-2008, 12:08 AM   #7
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Re: 2.2 Growing pains

yea what i was looking for is that the flex fuel models were blocked off internally inside the head for the EGR that the non flex fuel models use.
Old 03-20-2008, 05:49 PM   #8
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Re: 2.2 Growing pains

I'm tryin' to put a '98 2.2L in my '94 and use the old wiring and PCM. Is that advanced notch in the crank gonna rain on my parade?

My magic eightball says I'm screwed...
Old 03-20-2008, 06:45 PM   #9
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Re: 2.2 Growing pains

the 98 engine is set up for a different type of fuel injection
Old 03-21-2008, 11:31 AM   #10
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Re: 2.2 Growing pains

I was going to solder the new injector connectors to the old harness. Should work fine cept now spark and fuel will be off time cuz it uses only crank signal.
Old 04-03-2008, 04:11 PM   #11
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Re: 2.2 Growing pains

WOW....awesome info
Old 04-04-2008, 05:33 PM   #12
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Re: 2.2 Growing pains

Moderator, PLEASE STICKY THIS THREAD!!!!!!!!!!
This was very informative
Thanks
Old 04-04-2008, 05:39 PM   #13
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Re: 2.2 Growing pains

http://www.s10forum.com/forum/f105/2...ations-339157/
Old 04-04-2008, 07:48 PM   #14
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Re: 2.2 Growing pains

yea mod, do somethin usefull
Old 08-07-2008, 11:16 AM   #15
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Re: 2.2 Growing pains

hello I am in need of some information, i need to buy a header for my 2001 2.2 s10 and have found a 94-95 2.2 header and was wondering if anyone knew if that header would bolt onto my 2001 2.2. Any help would be great, thank you
Old 08-07-2008, 04:40 PM   #16
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Re: 2.2 Growing pains

98+ heads have smaller exh ports on them, head gaskets are interchangable only to 97,so it seems that it will not fit

i just junked both my 94-97 and 2002 2.2 motors so i cant even try it for ya

Last edited by FxsX24; 08-07-2008 at 04:43 PM.
Old 11-07-2008, 07:38 AM   #17
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Re: 2.2 Growing pains

hey i got a ? will a 98 2.2 work in my 96 2.2 if not what changes will be needed to work
Old 11-07-2008, 10:19 AM   #18
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Re: 2.2 Growing pains

i would guess you will have to change the whole wiring harness computer pretty much everything. i dont know that anything from the 96 would work on the 98 engine
Old 11-07-2008, 02:44 PM   #19
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Re: 2.2 Growing pains

y exactly would i have to change wire and stuff arent they both obd II
Old 11-07-2008, 05:31 PM   #20
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Re: 2.2 Growing pains

Quote: Originally Posted by 1996_s10_2.2
y exactly would i have to change wire and stuff arent they both obd II
98 has a completely different design as far as fuel delivery, combustion chamber design, head design, piston design....just because its obd2 doesnt make it swapable....not saying it cant be done but itll be a headache for you
Old 11-07-2008, 06:33 PM   #21
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Re: 2.2 Growing pains

o ok thanx
Old 11-07-2008, 08:21 PM   #22
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Re: 2.2 Growing pains

side by side the motors share nothing more than the displacement....
Old 11-08-2008, 10:59 AM   #23
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Re: 2.2 Growing pains

what if i switched the ecm with the 1 for the 98 would it work then?
Old 11-08-2008, 11:14 AM   #24
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Re: 2.2 Growing pains

i doubt it would work the engines are not really the same so they probably use different sensors and i would think that the 98 would probably have more sensors.
Old 11-09-2008, 01:13 PM   #25
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Re: 2.2 Growing pains

does any1 no what would have to be done to make it work and do u know if they have the same sensors and and what if i changed the intake would that work?
Old 11-09-2008, 02:36 PM   #26
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Re: 2.2 Growing pains

i dont believe the intake from the 98+ will bolt up to the 94-97 head but im not sure. check out the sticky in this section that ChrisOnllyn posted about the history of the 2.2
Old 11-09-2008, 02:39 PM   #27
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Re: 2.2 Growing pains

i just seen that to i wonder if i put my head if it would work cause im having no luck so far finding a 96-97 engine theses engines will bolt right in to a 1996 right just so i know
Old 11-09-2008, 06:07 PM   #28
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Re: 2.2 Growing pains

So can I put a 98 2.2l into my 2000 s10 with no problems
Old 11-09-2008, 07:11 PM   #29
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Re: 2.2 Growing pains

Quote: Originally Posted by drifterb
So can I put a 98 2.2l into my 2000 s10 with no problems
yes
Old 11-09-2008, 08:58 PM   #30
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Re: 2.2 Growing pains

just 1 ? a 1997 is the only other engine that will drop right in with no prob into my 1996 right?and if its out of a blazer will it drop right in
Old 11-09-2008, 09:02 PM   #31
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Re: 2.2 Growing pains

blazers never came with a 2.2. Sunfires, cavis,hombres,sonomas, and s10's 96-97 will work.
Old 11-09-2008, 09:35 PM   #32
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Re: 2.2 Growing pains

hmm thats what i thought to idk this guy told me he had a 2.2 but it was in a blazer but idk
Old 11-10-2008, 07:40 AM   #33
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Re: 2.2 Growing pains

any1^^
Old 11-10-2008, 02:07 PM   #34
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Re: 2.2 Growing pains

They did put 4cly in the 1st gen blazers but they are 2.5's not 2.2's
Old 11-10-2008, 03:51 PM   #35
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Re: 2.2 Growing pains

Quote: Originally Posted by laydout97
They did put 4cly in the 1st gen blazers but they are 2.5's not 2.2's
I agree, I've never seen a newer blazer with a 2.2, all of them 4.3s.

I've found some auto recyclers are pretty stupid. I was calling a few in Montana, one wrecker argued that my truck was the same as a fullsize suburban.

another one argued that my truck, since it was a 94 Sonoma, it was the older box style... man that guy wouldn't back down, I think I said buddy I own the truck not you, and hung up.

So always go and check to see what your buying. My buddies have boughten stuff over the phone and it ended up being for wrong vehicles, wrong years, etc.
Old 11-18-2008, 02:47 PM   #36
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Re: 2.2 Growing pains

yea the mighty deuce deuce cant get out of its own way in our s-tens! i dont wanna think of seeing it in a blazer hahahaha
Old 11-19-2008, 01:15 AM   #37
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Re: 2.2 Growing pains

they did put the 2.2 in the second gen blazers. i have never seen one. there is a listing in a few manuals i have seen with 2.2 4cyl blazer. only the 2 door i believe.
Old 02-04-2009, 11:41 PM   #38
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Re: 2.2 Growing pains

So from al the stuff I read here I should swap my 2.2 in my 1994 2WD pickup for the 1997 vortec 4.3 that I bought for $200. It is a incease of 82hp and 120 ftlb of torque. looks like I have alot of work ahead of me.
Old 02-05-2009, 12:15 AM   #39
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Re: 2.2 Growing pains

Quote: Originally Posted by Johnny Venomous
Moderator, PLEASE STICKY THIS THREAD!!!!!!!!!!
This was very informative
Thanks

wondering why this still isnt a STICKY
Old 02-05-2009, 12:19 AM   #40
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Re: 2.2 Growing pains

Quote: Originally Posted by t-scene
wondering why this still isnt a STICKY

I've been wondering this too. I third the motion.
Old 02-10-2009, 07:44 PM   #41
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Re: 2.2 Growing pains

ok i have a 96 s10 that i have bought a 98 motor for will i need to swap the wire harnesses , if so i have a guy with a 99 motor harness is this the same as a 98 if so then ill get it he only wants shipping costs
Old 02-10-2009, 08:51 PM   #42
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Re: 2.2 Growing pains

Sticky this! Its the mighty tutu's history!
Old 02-11-2009, 12:06 AM   #43
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Re: 2.2 Growing pains

Quote: Originally Posted by LONCOME
ok i have a 96 s10 that i have bought a 98 motor for will i need to swap the wire harnesses , if so i have a guy with a 99 motor harness is this the same as a 98 if so then ill get it he only wants shipping costs
You need the harness and computer. They are different from the 96-97 era.
Old 02-11-2009, 12:22 AM   #44
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Re: 2.2 Growing pains

Quote: Originally Posted by 94S10asm
they did put the 2.2 in the second gen blazers. i have never seen one. there is a listing in a few manuals i have seen with 2.2 4cyl blazer. only the 2 door i believe.
i know this thread is old, but this dude is wrong
Old 02-11-2009, 12:26 AM   #45
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Re: 2.2 Growing pains

Quote: Originally Posted by purplepassion
i know this thread is old, but this dude is wrong
you bored? lol
Old 02-11-2009, 12:28 AM   #46
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Re: 2.2 Growing pains

i didnt bump it
Old 02-11-2009, 12:37 AM   #47
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Re: 2.2 Growing pains

Quote: Originally Posted by purplepassion
i didnt bump it
not sayin ya did...just wouldnt expect you to be wondering around the 2.2 section
Old 02-11-2009, 12:58 AM   #48
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Re: 2.2 Growing pains

why not? my daily has a tu-tu
Old 02-11-2009, 11:19 PM   #49
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Re: 2.2 Growing pains

Quote: Originally Posted by purplepassion
why not? my daily has a tu-tu
dunno, dont see you ever post in here....lol, no big deal
Old 02-11-2009, 11:32 PM   #50
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Re: 2.2 Growing pains

Quote: Originally Posted by Chris0nllyn
no big deal
i know. and yea, i was bored last night
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