Smog pump question

abranz · 10-05-2009, 01:51 AM

I've got a bad smog pump and wondering if there is a way to remove it from the system with a serpentine belt on a 87 2.8. I've got a timing cover and all the pulleys for a 85 but the oil pan is different than the 87 as it actually bolts to the timing cover in the front and I don't have one. I was thinking of switching my belt system to a v-belt one from the 85 and just not running the smog belt but did not realize the oil pans were different. The engine is out as I'm resealing it so I thought it would be easy to do this. Any ideas? If I stick with the serp belt drive can the smag pump be bypassed? Thanks Anthony

cams · 10-05-2009, 08:48 AM

I have heard of guys hollowing them out before and just keeping the pulley as an idler. The LSx guys claim a noticeable increase in throttle response.

E.Morel · 10-06-2009, 12:31 AM

I just picked up an 89 2.8 last week. The smog pump was siezed and I didnt have time to gut it. I dont know if its all the same on the 87's, but I sized up a rope and got an 860k6 belt and bypassed the pump altogether. Belt fits nice and tight.

chaospartners · 10-07-2009, 10:58 PM

Quote: Originally Posted by E.Morel

I just picked up an 89 2.8 last week. The smog pump was siezed and I didnt have time to gut it. I dont know if its all the same on the 87's, but I sized up a rope and got an 860k6 belt and bypassed the pump altogether. Belt fits nice and tight.

Is there any way maybe u could get a pic of how u got ur belt ran? Im wanting to take my smog pump off to but the way im looking at it the belt would rub itself in order to turn the water pump the right way.

E.Morel · 10-08-2009, 12:18 PM

Ill snap a pic or two tonight. Basically I just ran it the same way as normal, leaving out the smog pump. It looks like it would hit at the tensioner, but its got a good 3/4 or an 1" of clearance.

chaospartners · 10-08-2009, 02:13 PM

Did it help the power any?

dusterbd13 · 10-08-2009, 05:31 PM

nope. it didnt for me. theres all the info you need in my build thread, incuding routing and belt number

michael

AHH AIR · 10-08-2009, 07:46 PM

i gutted mine and ran a smaller belt

chaospartners · 10-09-2009, 06:44 AM

did u ever get pics?

E.Morel · 10-09-2009, 07:46 AM

Sorry got kind of busy yesterday. I'll get some ASAP.

chaospartners · 10-09-2009, 11:29 AM

Thanks man

abranz · 10-10-2009, 01:14 AM

sure appreciate the replies. I gutted the pump but I think the front bearing is shot. Still not sure how to proceed. Pics? Thanks again Tony

chaospartners · 10-10-2009, 08:54 AM

yea im still waiting on them to lol

E.Morel · 10-10-2009, 11:07 AM

Im sorry guys! lol. Ive been busy! Last night I actually removed the hood from the truck to sand it and put it in primer and I completely forgot to take the pics. Ill do it today. I promise this time. lol

chaospartners · 10-10-2009, 02:22 PM

PICS YET???? lol

E.Morel · 10-10-2009, 05:33 PM

Alright folks. Here we go. the first pic is the orig. belt diagram, the second is a photoshop of the diagram with how I bypassed the pump. The third pic shows clearence between the tensioner and where the belt comes back up by it, and the last pic shows the smog pump, bypassed with no pully on it.

chaospartners · 10-10-2009, 06:32 PM

SWEET!! thanks man

chaospartners · 10-10-2009, 10:31 PM

Do u have ac? the belt u said u used was way to long for me!

abranz · 10-10-2009, 11:52 PM

Thanks very much,
Tony

E.Morel · 10-11-2009, 01:33 AM

Shit, yes sorry, I do have AC.

dragonwingblazer · 10-12-2009, 01:51 PM

did anybody figure out the non-ac belt #? i have ac but want to bypass that and the air pump

E.Morel · 10-12-2009, 06:05 PM

All i did was take a piece of rope (something that can't stretch too much) and ran it around the pullies that I wanted it to go around. I pulled it nice and tight and taped it where the end met back at the beginning. I brought it to the store and said "I need a belt this big...". Got it first try.

dragonwingblazer · 10-12-2009, 09:14 PM

Quote: Originally Posted by E.Morel

All i did was take a piece of rope (something that can't stretch too much) and ran it around the pullies that I wanted it to go around. I pulled it nice and tight and taped it where the end met back at the beginning. I brought it to the store and said "I need a belt this big...". Got it first try.

yeah i know about the rope method, i just never seem to have luck getting it right the first couple tries. and with it being an almost 40 mile round trip to the nearest auto parts store i would rather not take multiple trips

abranz · 10-13-2009, 12:49 AM

I had ac also but it's now removed. With power steering your belt length will be 80 inches. Napa has them.
Tony

chaospartners · 10-13-2009, 08:44 AM

I gave up!! i went to autozone 5 times trying different belts. I would get one that was just a bit to short so id go get one that was 1/4in bigger still could not get it to slip over the alternator pulley! this was with my dad bottoming out the tensioner and me trying to pull and work the belt onto the alternator! so it just wasnt going on so i went and got that was an 1in bigger and it had to much slack in it, and let the tensioner rub the water pump so that was no good either.. I said the hell with it and put the smog pump pulley back on .

Needless to say i tried 5 different belts to no avail!!

FFAMatt · 01-03-2010, 02:04 PM

I know this is an old thread but does the computer throw any codes when the smog pump is removed? I want to take mine off but I don't know if there are any ill side effects.

jtcfanof3 · 01-03-2010, 03:32 PM

No side effects and no code, but when I did my 3.4 swap I left the electrical connection still connected to the actuater portion, or w/e that portion is called on the pump. You may be able to just solder in a resistor and be good to go. I will have to research that connection and its values. And I welded the exhaust hole closed on the manifold.

FFAMatt · 01-03-2010, 06:51 PM

Could you just trace the wire from the electrical connection back to its source and take it off? And I plan to just find correct size bolts to put in place of the injection ports. That is if I do not get headers before then.

bullbear · 01-04-2010, 12:26 AM

I asked this ? else where on this site on how deleting the pump will effect the cat. I believe its purpose is also to cool the cat or to ad air to help burn exhuast. Will it hurt my. cat? 84 2.8

jtcfanof3 · 01-04-2010, 09:45 AM

It's actually called an A.I.R. System, it is used to help add oxygen into the exhaust system to completely burn off any extra hydrocarbons before it gets to the catalytic converter. It also adds cool oxygen into the converter to aid in the conversion process.
So will it burn up your converter? No, will it shorten its life? Yes, by how much, I don't know. So if you are removing your A.I.R. system, might as well remove your converter, unless you have to have a converter to pass inspection, but if that is required I almost bet the pump has to still be functional as well so it's a moot point.

bullbear · 01-04-2010, 09:03 PM

There is no emiissions where I live and the truck is exempt cause of age. I was under the impression the cat was also needed for proper back pressure ( told that by a muffler shop) I would prefer to delete it.

jtcfanof3 · 01-04-2010, 09:12 PM

You may loose some back pressure, but as long as you stay with close to stock exhaust diameter you will be fine.

bullbear · 01-04-2010, 09:24 PM

I have a ported stock intake, installing a crate 3.4 carb. engine w/ headers 1.5" in and 2.25" out collector, and my thought was to go from stock 2" to2.25" exhuast pipe. Without the cat whats your opinion on how it will run?

10-05-2009, 01:51 AM	#1
abranz Registered User Join Date: Sep 2009 Posts: 32 Location: User is: OffLine	Smog pump question I've got a bad smog pump and wondering if there is a way to remove it from the system with a serpentine belt on a 87 2.8. I've got a timing cover and all the pulleys for a 85 but the oil pan is different than the 87 as it actually bolts to the timing cover in the front and I don't have one. I was thinking of switching my belt system to a v-belt one from the 85 and just not running the smog belt but did not realize the oil pans were different. The engine is out as I'm resealing it so I thought it would be easy to do this. Any ideas? If I stick with the serp belt drive can the smag pump be bypassed? Thanks Anthony
	[Reply w/Quote]

10-05-2009, 08:48 AM	#2
cams Registered User Join Date: Feb 2007 Posts: 226 Location: User is: OffLine	Re: Smog pump question I have heard of guys hollowing them out before and just keeping the pulley as an idler. The LSx guys claim a noticeable increase in throttle response.
	[Reply w/Quote]

10-06-2009, 12:31 AM	#3
E.Morel Doin' Work Age: 23 Join Date: Aug 2009 Posts: 40 Location: User is: OffLine	Re: Smog pump question I just picked up an 89 2.8 last week. The smog pump was siezed and I didnt have time to gut it. I dont know if its all the same on the 87's, but I sized up a rope and got an 860k6 belt and bypassed the pump altogether. Belt fits nice and tight.
	[Reply w/Quote]

10-07-2009, 10:58 PM	#4
chaospartners Registered User Join Date: May 2007 Posts: 1,293 Location: Somewhere in Ohio User is: OffLine	Re: Smog pump question Quote: Originally Posted by E.Morel I just picked up an 89 2.8 last week. The smog pump was siezed and I didnt have time to gut it. I dont know if its all the same on the 87's, but I sized up a rope and got an 860k6 belt and bypassed the pump altogether. Belt fits nice and tight. Is there any way maybe u could get a pic of how u got ur belt ran? Im wanting to take my smog pump off to but the way im looking at it the belt would rub itself in order to turn the water pump the right way.
	[Reply w/Quote]

10-08-2009, 12:18 PM	#5
E.Morel Doin' Work Age: 23 Join Date: Aug 2009 Posts: 40 Location: User is: OffLine	Re: Smog pump question Ill snap a pic or two tonight. Basically I just ran it the same way as normal, leaving out the smog pump. It looks like it would hit at the tensioner, but its got a good 3/4 or an 1" of clearance.
	[Reply w/Quote]

10-08-2009, 02:13 PM	#6
chaospartners Registered User Join Date: May 2007 Posts: 1,293 Location: Somewhere in Ohio User is: OffLine	Re: Smog pump question Did it help the power any?
	[Reply w/Quote]

10-08-2009, 05:31 PM	#7
dusterbd13 GRM Challenge Truck Age: 28 Join Date: Apr 2008 Posts: 358 Location: User is: OffLine	Re: Smog pump question nope. it didnt for me. theres all the info you need in my build thread, incuding routing and belt number michael
	[Reply w/Quote]

10-08-2009, 07:46 PM	#8
AHH AIR George Smith Age: 26 Join Date: Jan 2007 Posts: 689 Location: watervliet, mi User is: OffLine	Re: Smog pump question i gutted mine and ran a smaller belt
	[Reply w/Quote]

10-09-2009, 06:44 AM	#9
chaospartners Registered User Join Date: May 2007 Posts: 1,293 Location: Somewhere in Ohio User is: OffLine	Re: Smog pump question did u ever get pics?
	[Reply w/Quote]

10-09-2009, 07:46 AM	#10
E.Morel Doin' Work Age: 23 Join Date: Aug 2009 Posts: 40 Location: User is: OffLine	Re: Smog pump question Sorry got kind of busy yesterday. I'll get some ASAP.
	[Reply w/Quote]

10-09-2009, 11:29 AM	#11
chaospartners Registered User Join Date: May 2007 Posts: 1,293 Location: Somewhere in Ohio User is: OffLine	Re: Smog pump question Thanks man
	[Reply w/Quote]

10-10-2009, 01:14 AM	#12
abranz Registered User Join Date: Sep 2009 Posts: 32 Location: User is: OffLine	Re: Smog pump question sure appreciate the replies. I gutted the pump but I think the front bearing is shot. Still not sure how to proceed. Pics? Thanks again Tony
	[Reply w/Quote]

10-10-2009, 08:54 AM	#13
chaospartners Registered User Join Date: May 2007 Posts: 1,293 Location: Somewhere in Ohio User is: OffLine	Re: Smog pump question yea im still waiting on them to lol
	[Reply w/Quote]

10-10-2009, 11:07 AM	#14
E.Morel Doin' Work Age: 23 Join Date: Aug 2009 Posts: 40 Location: User is: OffLine	Re: Smog pump question Im sorry guys! lol. Ive been busy! Last night I actually removed the hood from the truck to sand it and put it in primer and I completely forgot to take the pics. Ill do it today. I promise this time. lol
	[Reply w/Quote]

10-10-2009, 02:22 PM	#15
chaospartners Registered User Join Date: May 2007 Posts: 1,293 Location: Somewhere in Ohio User is: OffLine	Re: Smog pump question PICS YET???? lol
	[Reply w/Quote]

10-10-2009, 05:33 PM	#16
E.Morel Doin' Work Age: 23 Join Date: Aug 2009 Posts: 40 Location: User is: OffLine	Re: Smog pump question Alright folks. Here we go. the first pic is the orig. belt diagram, the second is a photoshop of the diagram with how I bypassed the pump. The third pic shows clearence between the tensioner and where the belt comes back up by it, and the last pic shows the smog pump, bypassed with no pully on it.
	[Reply w/Quote]

10-10-2009, 06:32 PM	#17
chaospartners Registered User Join Date: May 2007 Posts: 1,293 Location: Somewhere in Ohio User is: OffLine	Re: Smog pump question SWEET!! thanks man
	[Reply w/Quote]

10-10-2009, 10:31 PM	#18
chaospartners Registered User Join Date: May 2007 Posts: 1,293 Location: Somewhere in Ohio User is: OffLine	Re: Smog pump question Do u have ac? the belt u said u used was way to long for me!
	[Reply w/Quote]

10-10-2009, 11:52 PM	#19
abranz Registered User Join Date: Sep 2009 Posts: 32 Location: User is: OffLine	Re: Smog pump question Thanks very much, Tony
	[Reply w/Quote]

10-11-2009, 01:33 AM	#20
E.Morel Doin' Work Age: 23 Join Date: Aug 2009 Posts: 40 Location: User is: OffLine	Re: Smog pump question Shit, yes sorry, I do have AC.
	[Reply w/Quote]

10-12-2009, 01:51 PM	#21
dragonwingblazer Registered User Join Date: May 2009 Posts: 35 Location: User is: OffLine	Re: Smog pump question did anybody figure out the non-ac belt #? i have ac but want to bypass that and the air pump
	[Reply w/Quote]

10-12-2009, 06:05 PM	#22
E.Morel Doin' Work Age: 23 Join Date: Aug 2009 Posts: 40 Location: User is: OffLine	Re: Smog pump question All i did was take a piece of rope (something that can't stretch too much) and ran it around the pullies that I wanted it to go around. I pulled it nice and tight and taped it where the end met back at the beginning. I brought it to the store and said "I need a belt this big...". Got it first try.
	[Reply w/Quote]

10-12-2009, 09:14 PM	#23
dragonwingblazer Registered User Join Date: May 2009 Posts: 35 Location: User is: OffLine	Re: Smog pump question Quote: Originally Posted by E.Morel All i did was take a piece of rope (something that can't stretch too much) and ran it around the pullies that I wanted it to go around. I pulled it nice and tight and taped it where the end met back at the beginning. I brought it to the store and said "I need a belt this big...". Got it first try. yeah i know about the rope method, i just never seem to have luck getting it right the first couple tries. and with it being an almost 40 mile round trip to the nearest auto parts store i would rather not take multiple trips
	[Reply w/Quote]

10-13-2009, 12:49 AM	#24
abranz Registered User Join Date: Sep 2009 Posts: 32 Location: User is: OffLine	Re: Smog pump question I had ac also but it's now removed. With power steering your belt length will be 80 inches. Napa has them. Tony
	[Reply w/Quote]

10-13-2009, 08:44 AM	#25
chaospartners Registered User Join Date: May 2007 Posts: 1,293 Location: Somewhere in Ohio User is: OffLine	Re: Smog pump question I gave up!! i went to autozone 5 times trying different belts. I would get one that was just a bit to short so id go get one that was 1/4in bigger still could not get it to slip over the alternator pulley! this was with my dad bottoming out the tensioner and me trying to pull and work the belt onto the alternator! so it just wasnt going on so i went and got that was an 1in bigger and it had to much slack in it, and let the tensioner rub the water pump so that was no good either.. I said the hell with it and put the smog pump pulley back on . Needless to say i tried 5 different belts to no avail!!
	[Reply w/Quote]

01-03-2010, 02:04 PM	#26
FFAMatt FFAMatt Join Date: Nov 2009 Posts: 99 Location: NW Missouri User is: OffLine	Re: Smog pump question I know this is an old thread but does the computer throw any codes when the smog pump is removed? I want to take mine off but I don't know if there are any ill side effects.
	[Reply w/Quote]

01-03-2010, 03:32 PM	#27
jtcfanof3 ConvincedEVERYONEisondope Age: 34 Join Date: Aug 2005 Posts: 5,792 Location: barack hussein obama mmm mmm mmm User is: OffLine	Re: Smog pump question No side effects and no code, but when I did my 3.4 swap I left the electrical connection still connected to the actuater portion, or w/e that portion is called on the pump. You may be able to just solder in a resistor and be good to go. I will have to research that connection and its values. And I welded the exhaust hole closed on the manifold.
	[Reply w/Quote]

01-03-2010, 06:51 PM	#28
FFAMatt FFAMatt Join Date: Nov 2009 Posts: 99 Location: NW Missouri User is: OffLine	Re: Smog pump question Could you just trace the wire from the electrical connection back to its source and take it off? And I plan to just find correct size bolts to put in place of the injection ports. That is if I do not get headers before then.
	[Reply w/Quote]

01-04-2010, 12:26 AM	#29
bullbear Registered User Age: 47 Join Date: Jan 2010 Posts: 10 Location: duvall wa. User is: OffLine	Re: Smog pump question I asked this ? else where on this site on how deleting the pump will effect the cat. I believe its purpose is also to cool the cat or to ad air to help burn exhuast. Will it hurt my. cat? 84 2.8
	[Reply w/Quote]

01-04-2010, 09:45 AM	#30
jtcfanof3 ConvincedEVERYONEisondope Age: 34 Join Date: Aug 2005 Posts: 5,792 Location: barack hussein obama mmm mmm mmm User is: OffLine	Re: Smog pump question It's actually called an A.I.R. System, it is used to help add oxygen into the exhaust system to completely burn off any extra hydrocarbons before it gets to the catalytic converter. It also adds cool oxygen into the converter to aid in the conversion process. So will it burn up your converter? No, will it shorten its life? Yes, by how much, I don't know. So if you are removing your A.I.R. system, might as well remove your converter, unless you have to have a converter to pass inspection, but if that is required I almost bet the pump has to still be functional as well so it's a moot point.
	[Reply w/Quote]

01-04-2010, 09:03 PM	#31
bullbear Registered User Age: 47 Join Date: Jan 2010 Posts: 10 Location: duvall wa. User is: OffLine	Re: Smog pump question There is no emiissions where I live and the truck is exempt cause of age. I was under the impression the cat was also needed for proper back pressure ( told that by a muffler shop) I would prefer to delete it.
	[Reply w/Quote]

01-04-2010, 09:12 PM	#32
jtcfanof3 ConvincedEVERYONEisondope Age: 34 Join Date: Aug 2005 Posts: 5,792 Location: barack hussein obama mmm mmm mmm User is: OffLine	Re: Smog pump question You may loose some back pressure, but as long as you stay with close to stock exhaust diameter you will be fine.
	[Reply w/Quote]

01-04-2010, 09:24 PM	#33
bullbear Registered User Age: 47 Join Date: Jan 2010 Posts: 10 Location: duvall wa. User is: OffLine	Re: Smog pump question I have a ported stock intake, installing a crate 3.4 carb. engine w/ headers 1.5" in and 2.25" out collector, and my thought was to go from stock 2" to2.25" exhuast pipe. Without the cat whats your opinion on how it will run?
	[Reply w/Quote]