FR240
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« on: October 21, 2007, 08:00:35 PM » |
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I was driving around after washing our 1998 Oldsmobile Eighty Eight LS (3800 Series II) with a friend, so it would dry faster lol. I floored it a few times to overtake him, and it downshifted to first while going 50-60km/h. When I was driving home, I started to feel this slight vibration at lower rpms, and smelled something burning, so I took it easy until I parked the car. Then it seemed normal, so I put it in N and revved it. When the throttle was down, the revving would make the interior lights dim...WTF, and it would hesitate slightly and make this awful noise (synchronized with the induction sound), before the rpms started to fly up, as they should in a free revving engine. My dad took it for a spin and said, nothing seemed to be wrong. But then I assured him something seemed wrong to me, so I went down to the garage again, revved it in neutral and when the rpms dropped back down, the engine stalled. After that, it would not start, just crank. My tach seems to be weird, ever since we bought the car about 2 years ago. Under full throttle acceleration, it seems to exceed 6000rpm and goes to about 6500rpm, almost to the 7 mark on the tachometer :S scary. Also at idle it reads about 1000rpm, sometimes above when its a cold start. I dont know if it overreved while I was driving..... thanks, any help or a diagnosis of what happened would be very appreciated. Gosh I miss my 1997 Oldsmobile LSS supercharged lol, may it R.I.P. ..........stupid insuranceless Integra drivers turning left into ppl  |
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TurboSedan
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« Reply #1 on: October 21, 2007, 08:20:11 PM » |
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sounds like something just got wet, probably the coilpacks and/or alternator? i would let it dry out for awhile and try again. i would also check the accessory belt drives like the tensioner...that might have been the vibration/burning smell?
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  2000 Audi A6 Quattro - 2.7T/6-speed 1998 Buick Regal GS - L67/4T65E-HD |
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FR240
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« Reply #2 on: October 21, 2007, 08:22:34 PM » |
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The tensioner bearing was messed up before and it caused the belts to snap, and we JUST had the tensioner and the belts replaced a few days ago.......so I doubt those are giving out. I'm wondering why it won't even start now. Thanks for the response, any information helps  |
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FR240
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« Reply #3 on: October 23, 2007, 01:30:33 AM » |
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update: my dad told me that according to the mechanic, the engine blew a headgasket, and that was the cause for no coolant left in the "jar". Also we drove around for a LONG time to get home...........I doubt the head survived. Fuck fuck fuck fuck fuck this is gonna be expensive to repair. Any suggestions? I was like, we might as well ditch the L36 and put an L67 into it, like the LSS used to have. But this car gets crazy wheel hop from a start (so annoying) and an L67 has 280 lbs.-ft. of torque.........lol Anyways, any suggestions will be appreciated, thanks |
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Euro
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« Reply #4 on: October 23, 2007, 05:38:10 PM » |
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Is there coolant in the oil? That doesn't really seem 100% to be a headgasket issue to me. I don't even think I've heard of many other 3800's blowing headgaskets. You sure it wasn't an upper intake gasket?
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mfewtrail
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« Reply #5 on: October 23, 2007, 08:35:44 PM » |
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Euro
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« Reply #6 on: October 24, 2007, 08:13:25 AM » |
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What the hell are those 3 things supposed to do for a blown intake gasket? |
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R Dubya
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« Reply #7 on: October 24, 2007, 02:04:26 PM » |
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I've never done one but there is an issue with the exhaust pipe for the EGR that melts the intake and/or ruins the intake gaskets. GM revised the manifold with this new piece installed to prevent it, but its over $300 list price I think.
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Ryan Warren
2 89 TGP's
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mfewtrail
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« Reply #8 on: October 24, 2007, 05:49:53 PM » |
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What the hell are those 3 things supposed to do for a blown intake gasket? I've never seen a L36 blown intake gasket, but I've seen dozens of them with cracked intakes...so I doubt the original posters car has a bad intake gasket OR headgasket. That's why I pointed him to that site and that intake manifold kit. They always crack around that EGR passage... To the original poster, have you removed any of the spark plugs from the car yet? If not, I would remove at least the front and check for coolant in the cylinders. The engine usually gets filled with coolant when that intake manifold cracks like I mentioned above. Coolant can be in the cylinders from a blown headgasket also. You're going to have to do some disassembly work to fully diagnose your issue if you do find coolant where it isn't supposed to be.  |
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FR240
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« Reply #9 on: October 25, 2007, 07:03:18 AM » |
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update: the mechanic said that we might need to do an engine swap.......but then later he decided to open the engine and said that something burst a bit higher than where he said last time and the main problem was a crack in something (not sure where or what....sorry my dad didn't tell me the details.....i'll go there myself today and then post what i've learned ) and that there is a high possibility of saving money by replacing that part and then remachining the head, in case it was warped. There was a cloud of white smoke and a sweet smell when he started the car, so there was def. a coolant leak. the thing is if we get an engine swap, the motors have a "claimed" mileage of 150k at the minimum. We are not sure if those people are even telling the truth, there doesn't seem to be a way to check the mileage on an engine with certiainty. We know our engine has only 125k, so repairing that would be a better idea. Overall I'm very disappointed, I never expected an L36 to die so early.....we always used synthetic oil and changed it on time....did proper maintenance....its a pity really. I've never heard of a similar case before either. |
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Euro
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« Reply #10 on: October 25, 2007, 10:24:25 AM » |
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They aren't really supposed to puke this early......hmm. I don't think a motor swap should be the first thing to jump to.
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FR240
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« Reply #11 on: October 25, 2007, 01:20:11 PM » |
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I apologize for the bad descriptions of parts and typos (damn laptop kb lol) in advance, I dont' exactly know what they're called (the engine parts). I went to the shop in person to see what was going on and that black plastic thing with bumps on the top that air can flow through (right below the engine cover), which I think is the intake, was cracked right beside the small metal component with the mesh in a circle at one end (MAF?). The hole in the black plastic air intake thingy had a small crack and when air pressure was applied with the 3 holes sealed, you could se bubbles forming, indicating a leak, possibly explaining the coolant leak and the loads of white smoke. The mechanic said that that will need to be replaced ($489), and he's changing the thermostat as well as the intake gaskets ($150ish). The metal component (big metal thing at the top of the engine block that the air goes into after the black plastic thingy lol) (intake manifold??) was filled with water, along with the black plastic intake thingy, and coolant didn't really get into the oil according to him, so the engine should be ok. He said he'd replace the parts and run it for half an hour and then do an oil change. I was concerned in case the oil was mixed. Anyways so the total cost of thsi would be about a grand with labour...........better than an engine swap and we knwo thsi motor is only 125k. Thanks for the responses guys, any more information to teh cause would be appreciated, so we could fix that so this does not happen again, i read something abotu a revised EG valve part? What are you referring to, I'll tell the mechanic, so he doesn't order the same part again.
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FR240
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« Reply #14 on: October 26, 2007, 07:02:23 AM » |
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We're getting assraped for labour and dealer prices (approx $600 CAD for the same parts as in the links above + a thermostat, this is not including labour) Overall I'm surprised there was no recall by GM for such a small defect with catastrophic potential damage and consequentially, repair costs.
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Topic: Engine Problems, help! (Read 2347 times)
