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I may have locked up my engine

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Old 10-07-2011, 05:09 PM   #1
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Exclamation I may have locked up my engine

I think that I locked up my engine. It's a 1988 chevy s10 with a 2.8. I was driving to work and it just slowed to a crawl and wouldn't turn over. Is there a way to know for sure if its locked? Other than getting another engine are there any other ways to fix it? Thanks
Old 10-07-2011, 05:37 PM   #2
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Re: I may have locked up my engine

reach down and grab the harmonic balancer and try to turn it back and forth.. i did this with my old C10 strait 6 250.. but i was running it so hot it locked up.. let it cool down and it was fine.. does the starter on your engine engage?
Old 10-07-2011, 07:08 PM   #3
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Re: I may have locked up my engine

yes but it doesn't turn it over.
Old 10-08-2011, 09:53 AM   #4
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Re: I may have locked up my engine

i dont know about turning the balancer with your hands. id use some tools and see what happpens. pull the plugs and try to turn it over also. it could be a million different things.
Old 10-08-2011, 09:45 PM   #5
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Re: I may have locked up my engine

I tried turning the harmonic balancer with a wrench nothing , it didn't move at all . I was hoping that it wasn't the engine but I think it is.
Old 10-09-2011, 01:04 AM   #6
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Re: I may have locked up my engine

you should be able to rock it back and forth enough to tell if its locked or not. either way works though. does your temp gauge work? mine did and about the time the engine started dragging i was like wtf, looked at my gauge and it was buried past 250 degrees.

anyways, sorry bud.. this isnt looking promising. is it solid as a rock?
Old 10-09-2011, 07:08 PM   #7
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Re: I may have locked up my engine

Yes I can't move it at all
Old 10-09-2011, 10:37 PM   #8
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Re: I may have locked up my engine

man, thats not looking good. usually if the trans locked or something jammed, you could atleast turn it a little.. but since its solid in both directions.. it looks like your engine is seized. does your temp gauge work? if it heated up, and seized you could have scored a cylinder..
Old 10-10-2011, 05:57 AM   #9
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Re: I may have locked up my engine

Yeah that's what I'm thinking. Thanks for all your help.
Old 10-11-2011, 05:38 PM   #10
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Re: I may have locked up my engine

Is this an auto or standard? If it's a standard, you can try dragging it and letting the clutch out in 2nd or 3rd gear. Check your oil to make sure you have some left...
Sometimes (if you get lucky) you can break it free and it will keep running.
You can also pull the starter and use a pry bar to turn the engine by using the flywheel teeth and leverage.
Post the results...
Old 10-11-2011, 06:28 PM   #11
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Re: I may have locked up my engine

i wasnt sure if the T5 would stand up to that or not. so i didnt post it. i used to do this after sinking trucks to get them started again. lol
Old 10-11-2011, 06:53 PM   #12
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Re: I may have locked up my engine

Quote: Originally Posted by michanic220
i wasnt sure if the T5 would stand up to that or not. so i didnt post it. i used to do this after sinking trucks to get them started again. lol
I tried this on a locked engine in my camaro and all it did was slip the clutch.

If you can't spin it with a wrench, it's probably locked.
Old 10-11-2011, 06:57 PM   #13
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Re: I may have locked up my engine

Might try dropping off the belt, and checking for failed components I saw a locked up alternator keep a 2.8 from turning over.
Old 10-11-2011, 11:08 PM   #14
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Re: I may have locked up my engine

When it quite was it running hot, like 250 or hotter? Did you run it out of oil? With no obvious reason why it seized then I think there might be room for hope still.
Old 10-12-2011, 01:37 AM   #15
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Re: I may have locked up my engine

Could be hydro-locked, A cylinder filled with coolant or gasoline. Had that happen to my Safari van when the Fuel Injection died. Pull the spark plugs..
Old 10-12-2011, 02:58 AM   #16
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Re: I may have locked up my engine

hydrolock is crossed out because he said its locked in both directions.

im curious if it overheated..
Old 10-12-2011, 02:50 PM   #17
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Re: I may have locked up my engine

No it didn't overheat and it had oil in it
Old 10-12-2011, 04:25 PM   #18
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Re: I may have locked up my engine

I didn't see anything mention if it was an automatic or manual. But for grins I'd throw it in neutral and see if it spins if you haven't already. I know someone mentioned that it should move a little bit but if something happened to the tranny it may not.

Try all the things that were suggested as anything beyond that is probably going to require the motor being pulled to rebuild it if it indeed seized.

-Pull the plugs
-Take the belts off
-Transmission in Neutral
Old 10-12-2011, 08:13 PM   #19
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Re: I may have locked up my engine

motor seizing that had oil and didn't over heat.. this sounds odd to me.. even if per-say the input shaft seized.. you would still have a little bit of rock to the engine. not to mention to try to start it you would have to press the clutch in.. which would bypass the standard regardless. and w/ a automatic the torque converter would slip. the only thing i could really assume is a mechanical failure.. like you folded a piston ring and scored a cylinder. not much else will really keep it from spinning inside the engine other then heat expansion.
Old 10-13-2011, 01:36 AM   #20
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Re: I may have locked up my engine

I would've assumed you'd hear something break though. Last time I blew a motor it made alot of noise.

But stranger things have happened and if this happened on a freeway be distracted by dodging traffic I guess instead of troubleshooting what was going on.

Thinking your right michanic, something broke inside that's preventing it from spinning or like another poster said. One of the accessories has siezed and is preventing the motor from turning over. Though in that case I'd figure it would just slide through the belt
Old 10-13-2011, 02:29 PM   #21
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Re: I may have locked up my engine

yeah, well a ring folding over would slow it to a nice quiet stealthy halt.
i had a CR250R 2 stroke, these are quit prone to folding rings if you don't maintain them due to the poor oiling system of a 2 stroke. it folder over when i was on the back wheel doing about 60.. it was like somebody turned the key off.
Old 10-13-2011, 03:51 PM   #22
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Re: I may have locked up my engine

something else to think about, just because there was oil in the engine. doesnt mean it was pumping through the engine. do you have a oil pressure gauge on your truck? seems like it'd over heat a bit lacking oil though..
Old 10-14-2011, 09:21 AM   #23
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Re: I may have locked up my engine

...and knock!
Old 10-14-2011, 02:54 PM   #24
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Re: I may have locked up my engine

My buddy just had his do something similar on his 2.8l it was a seized up alternator.
Old 10-14-2011, 03:08 PM   #25
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Re: I may have locked up my engine

I had a mechanic look at it and he said that I sprung a bearing. I said that I could fix the bearing but it would be better if i just changed out the motor.
Old 10-15-2011, 03:33 PM   #26
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Re: I may have locked up my engine

if you spun a bearing 9x out of 10 your going to have to turn the crank or its just going to keep eating up bearings. then you should put in oversized bearings. while your in there its just easier to rebuild the engine then replace just the one bearing. do it right the first time. you can also look at the coloring of the bearing to see if they need to be changed. but there cheap enough i dont even think twice about changing them.
Old 10-17-2011, 01:42 AM   #27
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Re: I may have locked up my engine

Do I smell a 3.4l swap in the near future?
Old 10-17-2011, 09:38 AM   #28
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Re: I may have locked up my engine

I already found another 2.8. Already started to remove the old engine
Old 10-17-2011, 10:03 AM   #29
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Re: I may have locked up my engine

Thanks for posting back what you found
Old 10-19-2011, 03:09 AM   #30
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Re: I may have locked up my engine

no problem. Thanks for all the help.
Old 10-22-2011, 05:41 AM   #31
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Re: I may have locked up my engine

good news for you
Old 10-22-2011, 10:05 PM   #32
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Re: I may have locked up my engine

not really, that requires pulling the engine. probably having the crank turned. putting in new bearings, and like i said i'd rebuild it while im in there.

good news you got a new engine though.
Old 10-24-2011, 06:13 AM   #33
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Re: I may have locked up my engine

Yeah I bought one about a year ago. Been trying to sell it. Started the install last week. I'll keep you posted.
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