New member with questions on coolant leaks - 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 01-25-2004, 03:01 PM   #1
Junior Member
Thread Starter
 
Join Date: Jan 2004
Location: Virginia
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
JohnnyB is on a distinguished road
Default New member with questions on coolant leaks

Hi guys, I just found this board by accident and I'm glad I did. I have a Bonneville (SE) that I bought new in 1993. I've always liked the car and it has served me fairly well. It has a chronic coolant leak behind the throttle body. I took it to a mechanic that I trust and he replaced the intake gasket and that pretty much took care of it. Now, it is 1 year later and it is leaking again.

I've read where the series II engines have a prob with the intakes. Is this a problem with the series I engines also? Can someone recommend a good source for a replacement?

Thanks,
John


PS: I'm sorry if this subject has been beaten to death already
JohnnyB is offline   Reply With Quote
Old 01-25-2004, 05:14 PM   #2
Senior Member
Posts like a 4 Banger
 
Join Date: Nov 2003
Location: Boston, MA
Posts: 110
Thanks: 0
Thanked 0 Times in 0 Posts
bigJ is on a distinguished road
Default

From what I hear it is mostly the series II which has the upper intake problem - upper intake degrades in the EGR pipe area, causing coolant leaks. Just to clarify, which gasket did the mechanic replace on your car, the upper intake or the lower intake?

It might also be the throttle body gasket this time. It'* a rubber seal between the throttle body and the upper intake. It would leak coolant in roughly the same area. It'* a whole lot easier to replace - with some tools and a good manual it shouldn't take you that long.

You can find a lot of good information by searching past threads... use the "search" link in the upper-right corner of the forums page. Some good keywords would be "intake" "failure" "coolant" "egr" "gasket", etc.
bigJ is offline   Reply With Quote
Old 01-25-2004, 06:00 PM   #3
Senior Member
True Car Nut
 
Join Date: May 2002
Location: Edmonton, AB Canada
Posts: 2,621
Thanks: 0
Thanked 0 Times in 0 Posts
DeathRat is on a distinguished road
Default Re: New member with questions on coolant leaks

Quote:
Originally Posted by JohnnyB
Hi guys, I just found this board by accident and I'm glad I did. I have a Bonneville (SE) that I bought new in 1993. I've always liked the car and it has served me fairly well. It has a chronic coolant leak behind the throttle body. I took it to a mechanic that I trust and he replaced the intake gasket and that pretty much took care of it. Now, it is 1 year later and it is leaking again.

I've read where the series II engines have a prob with the intakes. Is this a problem with the series I engines also? Can someone recommend a good source for a replacement?

Thanks,
John


PS: I'm sorry if this subject has been beaten to death already
Sounds to me like the Throttle Body Base Gasket is leaking! Try replacing it with a new GM one.
DeathRat is offline   Reply With Quote
Old 01-25-2004, 08:01 PM   #4
Senior Member
True Car Nut
 
Join Date: Dec 2003
Location: Corn Fields, IN
Posts: 2,766
Thanks: 0
Thanked 0 Times in 0 Posts
John Deere Boy is on a distinguished road
Default

Yep i'll second (third?) that on the throttlebody gasket. That happened to my '93.

Hey why is the throttlebody cooled anyway? It doesn't seem to me like it would ever get hot.
John Deere Boy is offline   Reply With Quote
Old 01-25-2004, 08:06 PM   #5
Junior Member
Thread Starter
 
Join Date: Jan 2004
Location: Virginia
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
JohnnyB is on a distinguished road
Default

Thanks for the help guys, I'll tear into it this week.



Quote:
Originally Posted by John Deere Boy
Hey why is the throttlebody cooled anyway? It doesn't seem to me like it would ever get hot.

I believe it is to warm it in cold weather for better gas mileage and reduced emissions on start up. Of course, this also warms your intake air under all other driving applications, thereby reducing power.
JohnnyB is offline   Reply With Quote
Old 12-01-2004, 11:37 PM   #6
Senior Member
Posts like a Camaro
 
Join Date: Jul 2004
Location: Manassas, Virginia NOVA
Posts: 827
Thanks: 0
Thanked 0 Times in 0 Posts
CmptrNerd is on a distinguished road
Default

Yeah with that throttle body having coolant run through it, it turns into Mr. Ouch after a while of driving. Maybe one can put a solid gasket to keep it from flowing through? OMG I just resurrected a really old thread, haha.
CmptrNerd is offline   Reply With Quote
Old 12-01-2004, 11:56 PM   #7
Senior Member
Posts like a Turbo
 
Join Date: Jul 2004
Location: Woodstock Ill.
Posts: 214
Thanks: 0
Thanked 0 Times in 0 Posts
Ranger is on a distinguished road
Default

Quote:
Originally Posted by CmptrNerd
Yeah with that throttle body having coolant run through it, it turns into Mr. Ouch after a while of driving. Maybe one can put a solid gasket to keep it from flowing through? OMG I just resurrected a really old thread, haha.
You don't want to do that. The TB doesn't have coolant running through it to cool it. It has coolant running through it to heat it to prevent it from icing up.
Ranger is offline   Reply With Quote
Old 12-02-2004, 12:25 AM   #8
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

yea I've had the TB gasket go bad on my 93 its a fairly easy process to change it
1993 SLE is offline   Reply With Quote
Old 12-03-2004, 10:38 AM   #9
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 gasket

Lots of people mistake Throttle body leaks for intake gasket leaks.
SSEBONNE4EVA is offline   Reply With Quote
Old 12-03-2004, 10:59 AM   #10
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default Re: gasket

Quote:
Originally Posted by SSEBONNE4EVA
Lots of people mistake Throttle body leaks for intake gasket leaks.
a TB gasket leaking will drip coolant over the transmission
1993 SLE is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Questions,Questions,Questions.......... dbeast420 Lounge 2 05-06-2006 03:49 AM
Coolant Leaks sputnik767 1992-1999 23 02-07-2005 10:42 AM
New member with a couple of questions about a 95 Bonnie gruveb 1992-1999 7 01-11-2004 02:50 PM
Questions questions questions big_boss2010 1992-1999 2 09-06-2003 01:41 PM
series 1 supercharged coolant leaks to watch out for? billha 1992-1999 3 07-18-2003 10:34 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 04:29 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.