Engine giving me HELL - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-19-2011, 06:38 PM   #1
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Default Engine giving me HELL

help! after a LIM and UIM job, as well as everything you can think of (seriously)
crankcase sensor, new plugs, wires, fuel filter, ya ya whatever, thought i knew what i was doing---

im about to give up. sometimes i would leave it overnight and it would start right up next day as if the engine was flooded.

Everytime i try starting the car, it would either start like normal then slowly stall out while pushing out mostly white smoke. I open the oil fill on the valve cover and theres smoke in there too.

now I thought i did the job right with the gaskets and all, i think theres no leaks there, now could this be a blown headgasket now?

i mean I AM getting fuel, i smell it after trying to start sometimes it will just crank over and nothing, so I thought hmm maybe igition, checked all that out seems fine but need to get some spark tester, checked vaccum hoses everything...

down to the wire its either IGNITION or HEADGASKET. or is there still coolant/water in there that needs to come out, or am i just running bad gas? i used heet, i did everything you all would do, should I give up and tow it to a prove or hang on and let it run the water out, any thing else I am missing here???
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Old 03-19-2011, 06:48 PM   #2
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Have you checked the coolant level? If it'* going down then your leaking coolant in to the engine. The UIM may be cracked and leaking coolant in to the engine.
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Old 03-19-2011, 07:19 PM   #3
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I just got done replacing mine(96 Regal 3. the first of the year. When we got the car it had 131K and the gaskets had just been replaced so I thought we were good to go. At 140K we got the dreaded white smoke and the engine quit, hydrolocked!" After teardown I found that the EGR nipple that goes through the bottom of the UIM had "cooked " the plastic and there was a hole from the water passage into the UIM that you could stick a small phillips head screwdriver through which filled the UIM with water. Check the date on top of the intake(3 places) to see if it has been replaced as mine was the original. I used the improved design with a metal ring around the EGR hole and alumium LIM gaskets from GM. All is well since repair. Good luck!
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Old 03-19-2011, 08:48 PM   #4
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Did this start before or after the UIM job?
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Old 03-21-2011, 08:41 AM   #5
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Veg... I've offered help on more than one occasion. Never hear a thing back from you.

Would you like a hand? I'm local and I like to think I know a little about these cars.
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Old 03-22-2011, 01:41 PM   #6
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do a compression test to verify that your engine sealed right at first. then do a coolant leak test, put the system under pressure to verify its not leaking out as well. make sure your oil pan gasket isnt leaking badly as well as PCV valve. i have seen once, but still, seen it the car would do similar smoking w/leaking gaskets to crankcase.
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Old 04-02-2011, 07:38 PM   #7
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thanks for the replys, ive been busy trying to put things back together and well... after doing the common job for Upper and lower Intake, i started to add my coolant thinking everythings cool and bam, back to where i started, engine bogging down and white smoke. i started to get a code, got my brother to get a code reader and it was low voltage from TPS. picked up a new one and no more codes but still same problem

so i drained it back out and it started up again now i notice my oil level has gone up and seems more viscous or watery.

i thought maybe i didnt seal the LIM right, using the new aluminum one, maybe there was a leak, but i remember with the car running i saw bubbles coming from the radiator cap.

i guess i could perform a compression test, i have one of those things not sure how well itll do.. and my bro said hes getting an engine block tester, but after eliminating electrical and ignition and sensors, its gotta be something leaking in right?

so how can i test the oil for water, even though im sure its got some in, and how can i test which heads have a blown gasket if any? preferably without the engine running, thank you.

ps. if i didnt seal the lower intake well, easy fix. but if its a head..... then im screwed and this car wont be running til summer!!
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Old 04-02-2011, 08:22 PM   #8
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Bubbles in the radiator has me thinking blown head gasket, even though it rarely happens on these engines.

If the oil looks like chocolate milk, then it has water in it.

A compression test may show a blown head gasket, you should see a cylinder with lower compression then that others. A leak down tester my be a better option in this case.
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Old 04-04-2011, 09:19 AM   #9
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When you say drained it back out, the cylinders or radiator?
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