Oh Crap, UIM or Engine Failure? - 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.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-19-2005, 09:09 PM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2003
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
95greense is on a distinguished road
Default Oh Crap, UIM or Engine Failure?

Just got my 95 SE all back up to snuff. New ECM, struts, tires, brakes, alignment, etc.

Then today, it started sputtering and I just *barely* made it into my driveway. Now it'* hydrolocked I think. Cyl #3 is full of OIL (not antifreeze). Is this an UIM problem?
95greense is offline   Reply With Quote
Old 08-19-2005, 10:26 PM   #2
Senior Member
True Car Nut
 
Join Date: Oct 2002
Location: Groton, CT _NEBF 05, 06, 07_
Posts: 2,703
Thanks: 0
Thanked 0 Times in 0 Posts
markwb is on a distinguished road
Default

Valve guides?
markwb is offline   Reply With Quote
Old 08-19-2005, 10:27 PM   #3
Senior Member
Posts like a Camaro
 
Join Date: Feb 2005
Location: Gilroy, California
Posts: 922
Thanks: 0
Thanked 0 Times in 0 Posts
Bob Dillon is on a distinguished road
Default

coolant in the oil? Bottle empty?

Pull the plugs and crank it. It water comes out, yep.

If it'* your daily driver and you need a quick fix, PM me.
Bob Dillon is offline   Reply With Quote
Old 08-20-2005, 01:48 AM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

At this point, I'd be tempted to simply start tearing it down. It'll speed up the diagnosis and the repair.
willwren is offline   Reply With Quote
Old 08-21-2005, 12:58 AM   #5
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: Aug 2003
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
95greense is on a distinguished road
Default It was the UIM gasket

The plastic gasket was split around the area of the little pipe that comes out of the manifold. Replaced the whole UIM, cleaned injectors, throttle body, etc. Man was that nasty. Runs awesome now. Did I err by not replacing the head gaskets while I had it partially torn apart? What kind of life can I expect from the engine based on the somewhat limited facts I've put out this far? 50k more miles??

One other thing, we put Dexcool in it, although the old stuff was the green coolant. Will this be a problem? I would have used green stuff but my dad did it while I was away.
95greense is offline   Reply With Quote
Old 08-21-2005, 01:13 AM   #6
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

First of all, the head gaskets rarely fail.

Secondly, I hope you changed the oil before your crank bearings and rods rust.

Third, I'm not a fan of dexcool, although some have switched. I hope you didn't mix them, though, otherwise flush immediately. They're not compatible. Did you use the improved UIM?
willwren is offline   Reply With Quote
Old 08-21-2005, 01:51 AM   #7
Senior Member
Posts like a Camaro
 
Join Date: Feb 2005
Location: Gilroy, California
Posts: 922
Thanks: 0
Thanked 0 Times in 0 Posts
Bob Dillon is on a distinguished road
Default

95greense: Could I have your old UIM? I'll pay postage. You can use the shipping container the new one came in.

I'm sleeving them for members here who have failed UIMs.
Bob Dillon is offline   Reply With Quote
Old 08-21-2005, 11:20 AM   #8
Junior Member
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

Did you change the lower intake gaskets, too? If you run into this again, and you didn't change them, you should consider doing it. IMO, the lower intake gaskets are just as important to change as the lousy GM UIM.
vital49 is offline   Reply With Quote
Old 08-21-2005, 11:45 AM   #9
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Quote:
Originally Posted by willwren
First of all, the head gaskets rarely fail.

Secondly, I hope you changed the oil before your crank bearings and rods rust.

Third, I'm not a fan of dexcool, although some have switched. I hope you didn't mix them, though, otherwise flush immediately. They're not compatible. Did you use the improved UIM?
Agreed, its rare to ever see a set of head gaskets go out on a 3800... Not impossible, but incredibly uncommon...

I too hope that the oil was changed when you did all of this work... And if so drive the car a few hundred miles and change the oil and filter again to get the remaining contaminents out of the crankcase...

I was using dex cool as well... I changed over to Prestone Longlife... But if you mixed the red and green, flush the system, and go with fresh Prestong longlife or make sure its dex cool with no green mixed in at all...

Also it would have been a very good idea to do the lower intake manifold gaskets while you were in there as they too are proned to failure with age...

There is actually an upgraded GM intake gasket set that can be used on the 3800 II... You wouls also need a new coolant bypass elbow as well..

Good Luck

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 08-21-2005, 12:14 PM   #10
Senior Member
Certified GM nut
 
Join Date: Feb 2004
Location: CT
Posts: 2,099
Thanks: 0
Thanked 1 Time in 1 Post
SSEBONNE4EVA is on a distinguished road
Default uim

Yes do the lowers also. you'll be glad you did.
SSEBONNE4EVA is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
What are the early signs of UIM/LIM failure? two bonnies 1992-1999 11 02-25-2007 03:14 PM
UIM failure plug fouled??? 19bonnie95 1992-1999 14 12-03-2006 05:03 PM
post UIM failure trouble klystronik 1992-1999 7 12-02-2006 11:27 PM
It looks like new engine time - UIM failure Shovelhead 1992-1999 10 10-03-2006 05:30 PM
New Member Link to Techinfo Article on UIM failure Archon Forum updates and suggestions 3 07-24-2006 11:49 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:53 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.