'92 Bonne oil usage and now IM leak - 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.

Thread Tools Search this Thread
Old 08-13-2008, 01:10 PM   #1
Junior Member
Thread Starter
Join Date: Aug 2008
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
ThomD is on a distinguished road
Default '92 Bonne oil usage and now IM leak

I'll enter the fray over IM gaskets/Dexcool, along with oil usage.
I have a '92 Bonneville, with 224K. In March of 05, I bought a GM Goodwrench engine, had it installed (swapped) and changed over to Dexcool. About a year ago, I noticed that my oil usage (first 2 years, changed it twice a year, using only Mobil 1) was up...had to add a quart in between the 6 month change interval. I'm now using a quart about every month (still sticking w/Mobil 1), depending on how my wife drives it This past weekend, i noticed my coolant resevoir low/empty....YIKES. I know these engines are known to go through IM gaskets. There is not a single drop of ANYTHING that comes from the engine/trans area...except water from the A/C evaporator. So i called my 'trusty' engine shop, got a quote on heads (~$295/ea) and decided to start the tear down this weekend. UNTIL I see all the fray over Dexcool. This car had about 185K on it using the standard Green stuff (prestone) and it NEVER had any IM problems (from 16K anyhow, as my folks bought it in 5/92 as a program car with that many miles on it). I bought it from them with 99K and it has been the daily driver, ever since.

Anyway, I think I'll be replacing the Dexcool with the standard green stuff after I pull the heads and have them rebuilt. (Yes, i've done all the recommended stuff, new PCV valve, clean oil, etc...but the oil usage still continues...I even changed out the valve oil seals this past Nov....and after an 800 mile road trip (didn't see any oil usage during the trip), it'* back to the same thing.)

I've heard that (sometimes) the EGR valve may contribute to premature IM failure (due to heat), but since the 92 doesn't have an EGR valve (the only year, I believe), I can't see any other reason for an IM failing other than Dexcool (no...even though my wife drives it, its maintained nicely).

Regarding this Goodwrench engine, this is the first GM engine i've had problems with. I've purchased 3 TARGET engines (2-3800,1-5700) over the years (yes i'm old and cheap) and have never had problems with any of them (A target is a service replacment engine that GM uses to swap out warranty work at dealerships, from what i've been told. But once the engine is superceded, as in the case of my '92 3800, GM wouldn't produce them after 1 or 2 years). Anyway, no more Goodwrench engines for me. If I ever need another engine rebuilt, I'll either junk the car or take it and have it rebuilt by my trusty engine mechanic.

I don't have any specific questions, just thought i'd through my 2 cents in and see if anyone has any comments. Normally, I don't like going into the engine (hence, i've always purchased a complete one), but from my vantage point, this doesn't appear to be rocket science. First time looking at a fuel rail...but according to the book, you just have to be careful. Thanks for your time.
ThomD is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Oil usage Punkyberta Pontiac 5 06-12-2013 09:26 AM
Cell Phone Usage Ireli Lounge 19 02-03-2005 03:25 PM
Excessive natural gas usage? J Wikoff Lounge 9 01-19-2005 11:46 AM
Estimate usage out of a Intake Twister97 1992-1999 18 03-02-2004 08:27 PM
Usage of steering wheel buttons.. BonneAlien 1992-1999 2 12-26-2002 05:05 AM

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 02:52 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.