UIM failure symptoms - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Go Back   GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat > Pontiac Bonneville > 1992-1999

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.

LinkBack Thread Tools Search this Thread
Old 05-19-2007, 07:52 AM   #11
Senior Member
Posts like a Northstar
Join Date: Sep 2005
Location: Dayton, OH
Posts: 600
Thanks: 0
Thanked 0 Times in 0 Posts
imidazol is on a distinguished road
Default Re: UIM failure symptoms

Originally Posted by Kimbo
Can anyone provide me with the symptoms of a UIM failure or pictures of what it looks like? Or point me in the right direction?

Like someone posted earlier just check your coolant level regularly, cold and note the level carefully. It will start to drop slowly at first. It may be a cup in a month that doesn't go out through a water pump drip or hose drip that you can feel under a hose after the car sits hot.

The drop in level may increase to a pint a week like mine did or more. It will seem to be proportional to the amount of time the motor spends running when hot. Short trips affect it less because the system is pressurized less of the time. At this point when restarting after the motor sits hot, you may get a sweet scent out the exhaust that you recognize is coolant. It'* different than the fuel scent.

When mine was very bad on leaking there was a peppery effect to the scent out the exhaust pipe. This was within minutes of my motor starting to foul the plugs and not run well.

My leak was not through the EGR piping area. It looked like the thin rubbery seal next to one of the openings in the gasket that water goes up into the throttle body through had been leaking.
LeSabre 98
LeSabre 03
Dual auto air on both
imidazol is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
UIM replacement - symptoms, comments imidazol 1992-1999 4 05-15-2007 05:11 PM
Wheel hub failure symptoms? crzydmnd72 1987-1991 9 11-11-2006 11:00 AM
Symptoms of Cam/Balancer shaft bearing Failure newpontiac 1987-1991 1 01-12-2005 02:30 PM
Symptoms of FPR Failure mkaake 1992-1999 8 12-12-2004 02:24 AM
Fuel Pump Failure? Anyone have these same symptoms? 57chevythunder 1992-1999 13 08-26-2004 12:09 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 On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 01:05 PM.