coolant 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.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-09-2012, 09:40 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2010
Location: little rock, ar
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
trlbzrss is on a distinguished road
Default coolant leak

I recently changed a leaky water pump on my 96 Regal 3.8 along with a new 195 thermostat, rubber seal and paper gasket for the thermo housing. It looks like antifreeze is wicking through the paper gasket and down on the block and bellhousing. I was really careful cleaning the housing and tried not to scratch the surface to prevent leaks. What did I do wrong? All the bolts are tight along with the hose clamps.
trlbzrss is offline   Reply With Quote
Old 02-10-2012, 05:40 PM   #2
Senior Member
Posts like a Supercharger
 
Join Date: Sep 2005
Posts: 195
Thanks: 0
Thanked 6 Times in 5 Posts
imidazol97 is on a distinguished road
Default

Quote:
Originally Posted by trlbzrss View Post
I recently changed a leaky water pump on my 96 Regal 3.8 along with a new 195 thermostat, rubber seal and paper gasket for the thermo housing. .
Did you seat the thermostat edge into the slit in the middle of the rubber gasket? Did you get a new rubber gasket?

Those don't use a paper seal. The pressure of the top housing on the rubber in the small depression for it seals it to the thermostat and the lower housing.
imidazol97 is offline   Reply With Quote
Old 02-10-2012, 05:45 PM   #3
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Ditch the paper gasket.
2kg4u is offline   Reply With Quote
Old 02-10-2012, 07:42 PM   #4
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 418 Times in 376 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

I'd put some RTV on the paper gasket and put it back if it were me, because I looked my thermostat over and could not see how the rubber ring on the side of it would seal the thermostat housing to the LIM where it screws into.

Should one not use both gaskets?
I thought you had to use both...
I put the rubber one around my thermostat, and used the paper one on top, even out a little RTV on it, so far I have had no leaks at all.
WilliamE is offline   Reply With Quote
Old 02-11-2012, 04:27 PM   #5
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2010
Location: little rock, ar
Posts: 34
Thanks: 0
Thanked 0 Times in 0 Posts
trlbzrss is on a distinguished road
Default coolant leaks

Thank everyone for the hints,help and cures for my problems. It'* turned really cold here in Little Rock so it'll be a few days before I can get to it but I will report my findings and the fix.
trlbzrss is offline   Reply With Quote
Old 02-12-2012, 09:10 AM   #6
Senior Member
Posts like a Supercharger
 
Join Date: Sep 2005
Posts: 195
Thanks: 0
Thanked 6 Times in 5 Posts
imidazol97 is on a distinguished road
Default

Quote:
Originally Posted by WilliamE View Post
could not see how the rubber ring on the side of it would seal the thermostat housing to the LIM .
The lower intake has a recessed area for the o-ring. But the top compresses the rubber ring forming the seal.

Be sure the thermostat edge is in the slit in the middle of the rubber ring. When compressed the o-ring seals around the edge of the stat.

My question is whether the taper of the o-ring goes down toward the engine or up.
Attached Thumbnails
coolant leak-%24-kgrhqjhjboe7ymgfi5zbpbnykb03-%7E%7E60_12.jpg   coolant leak-dsc06213-2-1.jpg  
imidazol97 is offline   Reply With Quote
Old 02-12-2012, 04:53 PM   #7
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 418 Times in 376 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

Quote:
Originally Posted by imidazol97 View Post
The lower intake has a recessed area for the o-ring. But the top compresses the rubber ring forming the seal.

Be sure the thermostat edge is in the slit in the middle of the rubber ring. When compressed the o-ring seals around the edge of the stat.

My question is whether the taper of the o-ring goes down toward the engine or up.
Ahhh ok, I was just unsure as it would seal using just the rubber ring, so I figured I'd use the paper gasket as well, so far no leaks so hopefully it stays that way.

As for the taper, I am pretty sure the tapered part goes in towards the engine, if you put the gasket on the thermostat and drop it in it should fit properly with tapered side toward engine, as long as my memory serves me correctly..
WilliamE is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
93 LeSabre Front Driver Side Water Leak and back passenger leak Kimberly Buick 37 05-04-2014 03:40 PM
Minor Coolant Leak..drip..drip Jim W 1987-1991 28 05-16-2003 07:59 PM
How to check for Intake coolant Leak Daron97SSE 1992-1999 3 05-02-2003 10:35 AM
Coolant leak at MAF/ intake jebstuart 1992-1999 2 01-21-2003 05:49 PM
coolant leak d151avid 1992-1999 6 10-27-2002 11:39 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 06:41 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.