98 Bonneville SE died local mechanic said its head gaskets?? - 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 05-24-2010, 12:24 AM   #1
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: May 2010
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
JR98bonne is on a distinguished road
Default 98 Bonneville SE died local mechanic said its head gaskets??

Ok so my mom has a 98 bonneville and i want it she was driving it home one day and it died so she had it towed to a local shop the guy said there was water in the spark plugs so the head gaskets are bad or the head is cracked. from everything ive seen these 3800 dont normally have head gasket or head issues i want to fix the bonne and make it my daily driver it has about 100k on the motor and did run great until this happened the bad part is shes in california and im in nevada so i cant just drive over and take a look at it myself. from the symtoms what would you guy suggest? UIM? LIM? i dont have alot of money so i want to be very educated on this subject before i dive in and make that road trip to fix it and bring it back with me. i am a certified kia/mazda/Subaru mechanic. just not familiar with the bonnevilles. i have a full set of hand tools available where the bonnevillies located. Please any information on this subject would be greatly appreciated i searched alot of the forums but found nothing similar to what im experiencing. Please help!
JR98bonne is offline   Reply With Quote
Old 05-24-2010, 12:26 AM   #2
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Pull the throttle body and look at the EGR tube. You will find coolant there. That'* the problem, not the head gaskets.
Danthurs is offline   Reply With Quote
Old 05-24-2010, 12:34 AM   #3
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: May 2010
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
JR98bonne is on a distinguished road
Default quick fix?

Wow for the quick response is it a quick fix? How much would it cost to fix and what do I do I need to purchase??
JR98bonne is offline   Reply With Quote
Old 05-24-2010, 12:37 AM   #4
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

What happened is the plastic is cracked around the EGR tube and there'* coolant ports run right next to it. You can get the gaskets and pull the UIM and plug those coolant ports, you really don't need them. they just warm up the throttle body a bit.
Danthurs is offline   Reply With Quote
Old 05-24-2010, 12:54 AM   #5
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: May 2010
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
JR98bonne is on a distinguished road
Default re

Ok so I'm going to need a new throttle body gasket ,egr elbow, uim gasket and what else?
So since its just that little elbow could coolant have gotten into the motor? Second that elbow being cracked would make it not run? Should I replace the plugs as well?
JR98bonne is offline   Reply With Quote
Old 05-24-2010, 01:05 AM   #6
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Not sure what elbow your talking about. The problem is most likely the EGR stove pipe.
Danthurs is offline   Reply With Quote
Old 05-24-2010, 01:09 AM   #7
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: May 2010
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
JR98bonne is on a distinguished road
Default

Would I replace the whole egr? Or is just the stove pipe able to be replaced? Basically what all do I need and where would I get the parts I need! Thx for your help! BTW nice bonne nice shiny supercharger!
JR98bonne is offline   Reply With Quote
Old 05-24-2010, 01:19 AM   #8
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

The EGR is fine, it'* the UIM that'* the problem. You see, some mental midget thought it would be a great idea to make the UIM our of plastic, and then run hot exhaust gas threw that with coolant passages right next to it. The plastic get brittle and cracks letting coolant in to the EGR passage. That then allows coolant to get in to the engine.
Danthurs is offline   Reply With Quote
Old 05-24-2010, 01:35 AM   #9
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
Join Date: May 2010
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
JR98bonne is on a distinguished road
Default

Cool so where can I get a uim should I replace the lim as well?
JR98bonne is offline   Reply With Quote
Old 05-24-2010, 06:59 AM   #10
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

This is what you need to fix the problem...



Rockauto.com has this part, and the needed gaskets for $79.
Mike is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Am I the idiot or my mechanic? (LIM gaskets) bigerik 1992-1999 9 04-09-2007 08:10 AM
Intake Manifold Gaskets vs Head Gaskets mattsh 1987-1991 13 12-28-2006 11:24 AM
He Said, She Said: Marriage vs. Dating MOS95B Lounge 6 06-28-2006 11:30 AM
Head gaskets and all intake gaskets Jason C. 1992-1999 10 02-07-2006 12:10 AM
Rough acceleration, Died, Started, Blue Smoke, Died again... DannyM 1992-1999 38 09-01-2005 11:28 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 04:42 AM.


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.