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3800 same in different GM models?
Hello,
I just aquired a '92 bonneville with a bad engine. The engine won't idle once it warms up, so I did a compression test a found #1 cylinder was @ 150 psi and the rest were about 90. I was thinking about getting a good replacment motor at the wrecking yard. I was wondering if I could use an engine out of a Olds or Buick of the same year. I'm not real knowledgable about the newer vechicles and don't want to run into any problems. I'm new here and hope to learn a little something. Great site! :D John |
Do not get another 92 engine. They are EGR-less and are prone to burnt valves. The 93'-94' series 1 is good. Notice how you're 92' has a white upper and the 93' is black. Make sure the engine you get is the black one.
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Thanks for the advice! I heard about the burned valve problem and that may be the problem I have right now. Would the low compression cause the engine not to idle once it warms up, or is this related to something else? Guess I'll need to scan it!
John |
If you have 150psi on 1 single cylinder and 90 psi on the rest there is a problem for sure...
If you get another engine keep in mind that the L27 was built through 1995... The 1995 L27 was used in the Buick Lesabres and GM minivans with the 3800 Badge... 93-95 Vin L Tuned Port Injection 3800's will work for you.. Good Luck __________________ Best Car Insurance | Auto Protection Today | FREE Trade-In Quote |
valves
You could do a valve job and bring the engine back.
Lower end is pretty solid if its maintained. |
Plus getting a 93+ L27 will require wiring for the EGR and the ECM, I imagine.
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The intake on the 1992 L27 should be a direct bolt on to the newer L27 engines as well as the exahust manifolds... So it shouldn't be a large problem...
What I am wonder about is the heads tho... SSEBONNE4EVA, may have hit up on something... Its possible that all he needs is a good valve job... But the valve job and parts will run $300+ doing the work yourself... I have pretty much never seen a 3800 with piston ring issues... OTOH, if he is going to be installing a newer engine himself than it may be worth his while to find a newer L27.. I guess its all in what he'll want to do.. Good Luck.. :wink: __________________ Best Car Insurance | Auto Protection Today | FREE Trade-In Quote |
would he be able to plug and play with a super charged engine?
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No. He'd need the wiring harness, and ECM.
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Be sure to check www.car-part.com for an engine at a salvage yard near you. Plus this site will allow you to find some really good deals.
Wishing you best of luck, Martin |
Thank for all the advice! I think I'll just go with the top end job for now. Now I need to hunt down a new machine shop. The one I normally use is going out of businees after 40 years, I found out yesterday. Its hard to find a good machine shop you can trust these days!
Anything that can be done on the '92 that can correct the valve burning problem? John |
Maybe I'm not understanding this right, but you guys are saying to get a 93-95 engine because they don't get burnt exhaust valves, but then you're telling him it won't be a bolt-in applictation unless he swaps over his intake manifold. Now, I could be wrong on this, but won't that remove the EGR, completely ruining the whole point of going to the newer engine? And if he still does have his EGR, its not going to have wiring and stuff to make it work, so wouldn't wiring harness(es) and the ECM have to be changed?
Shawn |
He van use a newer motor... Without the EGR if he wants to... All the parts will be a direct swap...
Now if he wanted to add the EGR then he would also need the wiring harness and PCM... Seeing that he will be doing the heads as opposed to the engine swap... I reccomend a Fel-Pro gasket set... Unless the dealership is cheaper... The gasket set will have the Valve stem seals, he will also need a new set of head bolts... I will guess that the head work will be a couple hundred depending on what valves need to be replaced... If thats indeed the problem... Its all in what he wants... And eventhough I know of some 3800's 90-92 that have burned valves, most of the ones I have seen have gone well beyond 200,000 with no issues... My friend drive a 92 Park Avenue that runs better than my 91 bonneville... He is only at 139,000 miles... Car runs like new... :wink: __________________ Best Car Insurance | Auto Protection Today | FREE Trade-In Quote |
I called on the cylinder head work and it was priced at $330 w/o the gaskets and bolts. Went on Carpart.com and found 92 motor complete for $325. compression was said to be 180 on all the holes.90 day warrenty. the best thing it was located only a mile away from my home.
I figured it might not be a bad idea to replace the O-2 and crank sensor before I do the install. I read to stay away from Bosch, How is Napa? Thanks John |
My son's '92 SE now has about 280,000 miles on it. Engine has never been opened up. It IS beginning to get pretty weak, though. But 280,000 miles.....
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I think a lot of guys here have recommended the AC-Delco O2 sensor. In my town there is an ACDelco store; they sell the one for my car for $55, about the same as the other brands.
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Thanks............I'll go with the factory parts!
John |
Originally Posted by dbtk2
Maybe I'm not understanding this right, but you guys are saying to get a 93-95 engine because they don't get burnt exhaust valves, but then you're telling him it won't be a bolt-in applictation unless he swaps over his intake manifold. Now, I could be wrong on this, but won't that remove the EGR, completely ruining the whole point of going to the newer engine? And if he still does have his EGR, its not going to have wiring and stuff to make it work, so wouldn't wiring harness(es) and the ECM have to be changed?
Shawn |
Originally Posted by jwikoff99
Originally Posted by dbtk2
Maybe I'm not understanding this right, but you guys are saying to get a 93-95 engine because they don't get burnt exhaust valves, but then you're telling him it won't be a bolt-in applictation unless he swaps over his intake manifold. Now, I could be wrong on this, but won't that remove the EGR, completely ruining the whole point of going to the newer engine? And if he still does have his EGR, its not going to have wiring and stuff to make it work, so wouldn't wiring harness(es) and the ECM have to be changed?
Shawn The EGR'less thread was morte explainatory than anything.... If you kept a 90-92 L27 for a lifetime chances are that you may end up with a burnt exahust valve... That doesn't meant the engine won't get to 200,000+ miles.... I have seen too many go that far and beyone... But in the same note I have seen L27( EGR'less) and 3300's( also EGR'less ) burn valve after 100,000... These are few and far between tho... I just felt that if he could find an entire engine that had an EGR his chances of having a burnt valve in the future would be reduced as it always had an EGR.. At least this way her would get good life out of that motor... :wink: __________________ Best Car Insurance | Auto Protection Today | FREE Trade-In Quote |
Got the replacement engine installed today! The only problem I encountered was locating the transaxle to engine bolt in the rear, the one that goes in from the right side. Used a 36'' extention and an 18mm "wobbly" impact socket to remove the bolt. When I installed the bolt I used some heavy grease, to hold the bolt in the socket.
The engine runs real nice............my weekend was well spent! John |
glad to see that everything worked out
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Glad to hear it... :wink:
__________________ Best Car Insurance | Auto Protection Today | FREE Trade-In Quote |
Good job! Thanks for letting us know how it turned out.
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