Several Questions Relating To LIM Gasket Replacement - 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 01-04-2008, 12:27 PM   #1
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Mar 2007
Location: Minneapolis, MN
Posts: 509
Thanks: 0
Thanked 0 Times in 0 Posts
Barry is on a distinguished road
Default Several Questions Relating To LIM Gasket Replacement

Three questions: First, with 107k on the engine, would it be wise to replace the water pump when I do the LIM gaskets. I have no issues with it now, but they are not very expensive and would seem to be a good time to do it.

Second, Is it really necessary to remove a knock sensor to drain the block when doing the LIM? I would think draining radiator would lower water level enough. I have heard the knock sensors can be a PITA to get at.

Third, what type/brand of thread coating do you recommend for bolts that go into water jackets? Thanx
Barry is offline   Reply With Quote
Old 01-04-2008, 01:43 PM   #2
Senior Member
Posts like a 4 Banger
 
Join Date: May 2006
Location: East Central Illinois
Posts: 135
Thanks: 0
Thanked 0 Times in 0 Posts
BMWhound is on a distinguished road
Default Re: Several Questions Relating To LIM Gasket Replacement

Quote:
Originally Posted by Barry
Three questions: First, with 107k on the engine, would it be wise to replace the water pump when I do the LIM gaskets. I have no issues with it now, but they are not very expensive and would seem to be a good time to do it.]
Depends if you plan on keeping the car. It sounds like you plan on keeping it, so I would say yes, go ahead and replace.

Quote:
Second, Is it really necessary to remove a knock sensor to drain the block when doing the LIM? I would think draining radiator would lower water level enough. I have heard the knock sensors can be a PITA to get at.
I don't think this is necessary
BMWhound is offline   Reply With Quote
Old 01-04-2008, 02:41 PM   #3
Senior Member
Posts like a Corvette
 
Join Date: Jan 2007
Location: San Diego, CA
Posts: 1,451
Thanks: 0
Thanked 0 Times in 0 Posts
agrazela is on a distinguished road
Default Re: Several Questions Relating To LIM Gasket Replacement

Quote:
Originally Posted by Barry
Three questions: First, with 107k on the engine, would it be wise to replace the water pump when I do the LIM gaskets. I have no issues with it now, but they are not very expensive and would seem to be a good time to do it.

Second, Is it really necessary to remove a knock sensor to drain the block when doing the LIM? I would think draining radiator would lower water level enough. I have heard the knock sensors can be a PITA to get at.

Third, what type/brand of thread coating do you recommend for bolts that go into water jackets? Thanx
I asked a similar question once about the WP. The general consensus was, "if it ain't broke, don't fix it."

As to the coolant...if all you're looking to do is remove enough coolant to do the LIM gaskets, you can easily just siphon the radiator dry with a long piece of tubing and a bucket. If, on the other hand, you are looking to get every last trace of Dexcool out of your engine, a lengthy hose flushing with the knock sensors removed is the easiest way I know of to flush and drain the block completely.

For sealing bolts into water jackets, I've used this:
http://www.permatex.com/products/aut...ad_Sealant.htm
(Contains PTFE according to MSDS. Stuff also works great on transmission cooler fittings, coolant level sensor in LIM, oil level sensor in oil pan, washer fluid level sensor in washer reservoir, etc.)
agrazela is offline   Reply With Quote
Old 01-04-2008, 02:44 PM   #4
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

The most effective and quickest way to drain the coolant is to syphon the radiator using some 1/4 hose shoved down all the way to the bottom of the rad so you can drain the entire rad. As long as you get one gallon of coolant syphoned out, you will be fine. I did my water pump and didn't lose a drop.
2000SilverBullet is offline   Reply With Quote
Old 01-04-2008, 02:48 PM   #5
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Mar 2007
Location: Minneapolis, MN
Posts: 509
Thanks: 0
Thanked 0 Times in 0 Posts
Barry is on a distinguished road
Default

Thanks for comments so far. I had Dex flushed out last summer by a shop, so that is not an issue.
Barry is offline   Reply With Quote
Old 01-04-2008, 03:48 PM   #6
Junior Member
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

I wouldn't mess with the water pump. I sold my 99 SE this past summer with 177,000 on the clock with the original water pump. No issues with it.

I like using the pet **** on the driver'* side bottom of the radiator for draining the coolant. No need to remove knock sensors.
vital49 is offline   Reply With Quote
Old 01-04-2008, 08:58 PM   #7
Senior Member
Posts like a Turbo
 
Join Date: Sep 2007
Location: Saginaw, MI
Posts: 345
Thanks: 0
Thanked 0 Times in 0 Posts
TheDude is on a distinguished road
Default

I replaced the waterpump on mine when I did the rebuild, just because it was cheap and the best time to do it. But when I do customers cars, I usually dont unless I notice it leaking. I use "Right Stuff" black sealant on mine and havent had a single one come back excecpt for an oil change. JMO
TheDude is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
forum newbie...2000 regal LS lim gasket replacement questions fiddlebick Buick 13 02-17-2013 03:05 PM
Several Questions/Problems 93 SSEI Rough Idle/Fuel Pressure Knight-Design 1992-1999 21 09-02-2010 04:00 PM
How can I diagnose a blown head gasket? Maybe LIM gasket? rstrunk 1992-1999 6 03-15-2009 10:24 PM
building a nitrous motor... several questions within. Marik_bathory Performance, Brainstorming & Tuning 7 11-19-2006 07:09 PM
'96 SE - Have several questions, maintenance, T-shoot & Neisse 1992-1999 5 09-15-2005 03:47 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 10:53 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.