Couple of questions - 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 10-21-2006, 09:09 AM   #1
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Default Couple of questions

1-Okay, so I have been losing coolant for a while now, and I think it is getting inot the motor somehow. ( Saw a fair amount of it running out the exhaust right after taken it for a short drive immediatley after filling it with coolant) Not 100% certain, but from what I read here guessing it is either the UIM or LIM? So how much do these cost and how hard are they to do?
2- Have been also losing power (stalling). See link for full story http://www.bonnevilleclub.com/forum/...t=losing+power
Now know it is either the crank sensor or the EGR valve. I have pulled and cleaned the EGR vavle and problem remains. SO question 2 is basd on expertise of the club, which of these is more likely to be the culprit? Which of these is more likely to be making the battery guage "dance"? Heck, what do these 2 parts even do?
I found out that I am gonna have to take it to a garage for the crank sensor, don't have access to the tools I thought I would. Gonna try to put it on the computer next week to see if I can get any codes, but trying to be prepared, ya know?
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Old 10-21-2006, 11:38 AM   #2
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1 im ganna guess head gasket on that one. as far as i know the uim and lim have nothing to do with it going into the exaust.

2 dont think egr valve would have anything to do with the voltage meter goin crazy...
try wikipedia for what they do
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Old 10-21-2006, 03:42 PM   #3
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Here is my opinion on the first question. I would bet you have an UIM failure. If the leak is bad enough to spit it out the exhaust I would say that this could also be your reason for the stalling and power loss. Due to coolant leaking into the combustion chamber and killing the spark. This would cause it to run very rough and also stall. I am not a pro and I am sure one of the resident gearheads will chime in soon. I would also recommend not operating the car anymore as you could blow the gasket too much and cause Hydrolock. You will then need to rebuild. Save yourself some money and fix the UIM with one from the two members here that customize them to never fail again. I would do it now before it is too late. This is a common problem to many members here. By the way I have also found from other members here that it is very rare for head gaskets to blow on theses motors, and that they have only confirmed 4 cases so far. Good luck.
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Old 10-21-2006, 04:45 PM   #4
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Quote:
Originally Posted by ieatfeets
1 im ganna guess head gasket on that one. as far as i know the uim and lim have nothing to do with it going into the exaust.

2 dont think egr valve would have anything to do with the voltage meter goin crazy...
try wikipedia for what they do
How many 3800'* have you see with a blown head gasket?

Now if we want to talk about the alluminum head 60* V6'* and Quad 4'* as well as the 2.0 and 2.2 Pushrod 4 cylinders, then we'd have a diffrent story..

Its uncommon for a 3800 to blow a head gasket unless it has been run extremely hot..

This is classic Upper intake failure.. And should be checked before we decide the head gaskets are at fault..

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Old 10-21-2006, 04:47 PM   #5
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Quote:
Originally Posted by Blownville
Here is my opinion on the first question. I would bet you have an UIM failure. If the leak is bad enough to spit it out the exhaust I would say that this could also be your reason for the stalling and power loss. Due to coolant leaking into the combustion chamber and killing the spark. This would cause it to run very rough and also stall. I am not a pro and I am sure one of the resident gearheads will chime in soon. I would also recommend not operating the car anymore as you could blow the gasket too much and cause Hydrolock. You will then need to rebuild. Save yourself some money and fix the UIM with one from the two members here that customize them to never fail again. I would do it now before it is too late. This is a common problem to many members here. By the way I have also found from other members here that it is very rare for head gaskets to blow on theses motors, and that they have only confirmed 4 cases so far. Good luck.
I agree... I'd say get the coolant drained... Then drain the oil... Refill with fresh cheapie oil... Start it and let it run for a brief moment... I mean very brief... As in 15-20 seconds after the oil change... Just enough to get fresh oil on the crank bearings and journals

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Old 10-21-2006, 05:01 PM   #6
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Also, when you do the upper, might as well do the lower & coolant elbow.
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Old 10-21-2006, 05:58 PM   #7
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I've been thinking I would do both upper and lower.
I figured it wasn't head gasket. I've had that happen before and it doesn't seem like that. So how do I do the UIM and LIM and how much do they cost?
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Old 10-22-2006, 06:39 AM   #8
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Please read the Techinfo article on this problem: http://www.bonnevilleclub.com/forum/...e=article&k=38

If you do the work yourself, about $220. If you spend some time reading the links in the above article, you will see several examples, including photographs, of how to do the repairs. If you have it done, maybe $350 - $500. No matter who does the labor, I recommend the APN upper kit and GM aluminum frame lower intake manifold gaskets.
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