broken plastic coolant bypass fitting repair info - 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.

Closed Thread
 
 
 
Thread Tools Search this Thread
Old 01-14-2005, 12:06 PM   #1
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Jan 2002
Location: southern California
Posts: 538
Thanks: 0
Thanked 0 Times in 0 Posts
billha is on a distinguished road
Default broken plastic coolant bypass fitting repair info

If anyone'* interested, the following info may be helpful if your Bonnie has the plastic coolant bypass fitting and it breaks off, as mine recently did on my '92 SSE */c at 165,000 miles.

Here'* what happened. I noticed some coolant on the top of the intake near the bypass hose, so I assumed that the hose was leaking, although there was no sign of coolant running along the bottom of the hose or dripping at the end. I loosened the hose clamps and when I gently turned the hose to try to remove it, the bypass fitting snapped into two pieces so that half of it was in the end of the hose, and the other half was still in the intake.

I found an easy way to remove the broken piece of the fitting from the intake. I gently tapped a nipple removal tool (a $3 tool used to disassemble PVC sprinkler pipes) into the opening on the broken part of the fitting and slowly turned it counterclockwise. It removed the broken piece of the fitting quickly and easily, and it only took 1 attempt to be successful. I bought a replacement fitting (metal) from Pep Boys for $6...shame on GM for making the part out of plastic.
billha is offline  
Old 01-14-2005, 01:19 PM   #2
Senior Member
Posts like a Turbo
 
Join Date: Jul 2003
Location: Markham, Ontario, Canada
Posts: 239
Thanks: 0
Thanked 0 Times in 0 Posts
faisalmali is on a distinguished road
Default

Sounds familiar. Just happened to me two months ago. What I did was use a hacksaw blade and sawed in 3 places and removed the broken pieces by hand. You have to be careful not to 1) saw into the metal housing and 2) drop any plastic pieces inside. It turned out very well.

Unfortunately, I paid $25 Cdn for the metal fitting and $22 for the bypass hose from the dealer. (my brother subsequently told me that you can get that fitting at Home Depot for $1 - I never checked.... )
faisalmali is offline  
Old 01-14-2005, 06:23 PM   #3
Junior Member
Posts like a Ricer Type-R
 
Join Date: Nov 2003
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
OregonRuddFan is on a distinguished road
Default

Congratulations, you got lucky. I tried the same tool a year ago when the fitting on my 92 SE broke and it did not work at all. After numerous tries with that and other tools, I ended up using a hacksaw to cut the piece like faisalmali did and then a screwdriver and hammer to chip out the parts.

This weekend'* project involves replacing the failed lower intake gaskets and the throttle body gasket. Since there is no coolant in the car anyway, I figured it was a good time to put in a 180 degree thermostat also.
OregonRuddFan is offline  
Old 02-08-2008, 09:28 AM   #4
Senior Member
Posts like a Turbo
 
Join Date: Nov 2004
Location: HIRAM, OHIO
Posts: 237
Thanks: 0
Thanked 0 Times in 0 Posts
TROYPORT is on a distinguished road
Default fitting and o-ring?

I removed this plastic fitting from my lower intake - It'* not broke, but I want to put in a fresh one. This thread speaks of one from Home Depot? I'm guessing you're talking about an NPTmale - to - barb standard plastic pipe fitting that I might use on my well pump at home. I'm skeptical on that, with head and antifreeze vs. domestic cold water.
Also, it looks like my fitting had an o-ring on it and straight threads? Can someone verify and / or give me part numbers and / or a source for this nipple and o-ring? Thanks. Mike
TROYPORT is offline  
Old 02-08-2008, 09:36 AM   #5
Junior Member
 
Join Date: Apr 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Bonneville92V688 is on a distinguished road
Default

Wow.. this post is OLD that you brought up.

Start a new post, so we can help you, I know of the part you are talking about.
Bonneville92V688 is offline  
Old 02-08-2008, 10:17 AM   #6
Senior Member
Posts like a Supercharger
 
Join Date: Jan 2008
Location: Orlando Florida
Posts: 182
Thanks: 0
Thanked 0 Times in 0 Posts
lunchboxx is on a distinguished road
Default

Just did this, along with a LIM job on my 96 sle. My bypass elbow was not threaded, but it did break off about flush with the fitting so that about 1/2 and inch of plastic was still in my tensioner assembly and in the LIM. I dug it, and the gooey excuse for an O-ring out, and gently cleaned the gasket maker out of the holes. Looks like this leaked before i got the car and instead of fixing the problem correctly, previous owner decided RTV would fix everything. It did,...for a while i guess.
lunchboxx is offline  
Old 02-08-2008, 11:49 AM   #7
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Luchboxx, totally different application and part. Not even close.

Troyport, please check the dates on super-old topics before replying. We've been suggesting this for years as preventive maintenance. Steel replacements are available all over. In fact, I doubt you can find plastic any longer.
willwren is offline  
 
 
Closed Thread

Related Topics
Thread Thread Starter Forum Replies Last Post
Plastic coolant fitting! 92BonnivilleSSEi 1992-1999 4 04-11-2010 11:20 PM
plastic fitting TROYPORT 1992-1999 6 02-08-2008 11:54 AM
Oopsy, I broke my plastic coolant fitting. Bonneville92V688 1992-1999 7 08-12-2007 08:32 PM
Broken upper bypass fitting Aubie 1992-1999 2 06-01-2004 01:47 AM
Changing plastic fitting between bypass hose and intake bigJ 1992-1999 8 12-18-2003 03:21 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 07:43 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.