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.

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Old 11-19-2004, 02:39 PM   #1
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Default Coolant Leaks

Hey everyone,
My grandfather said this morning that he lost a lot of coolant from his '95 Bonneville, and when I looked at it, there was a puddle of antifreeze on the passenger side of the engine right below the PCV valve. There is a plastic tube going from the belt tensioner into the engine block right below the PCV and if you squeeze the main hose, coolant will trickle from where the tube enters the engine. Can someone please tell me what that tube is for first of all, and second what the problem might be. The tube itself is fine. Thanks a lot.
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Old 11-19-2004, 02:51 PM   #2
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Sounds like the composite elbow failed. Try removing the hose and see if there is a plastic fitting there. I believe that'* a pretty cheap part, but I don't know the number or exact name right now
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Old 11-19-2004, 03:38 PM   #3
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It'* called the coolant by-pass elbow. Goes between the lower intake manifold and the belt tensioner. $7 part from the dealership! It is common for them to fail, btw.
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Old 11-19-2004, 03:42 PM   #4
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Yep. Mine just failed too. Replacement is metal. I paid $25 Canadian at the dealer. The hose is $21 Canadian, but I am going to try to use a 5/8" heater hose (doing it this weekend).
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Old 11-19-2004, 03:58 PM   #5
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Thanks a lot for your replies everyone. I am relieved that it is such a cheap fix. Is it easy to replace the elbow?
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Old 11-19-2004, 04:01 PM   #6
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Depends on where it broke. Mine broke in my LeSabre (same engine, in case you didn't know). It broke off flush with the block, so the repair shop claimed they had a heck of a time getting it out.

My thinking is that if you can wedge something in the plastic part to turn it, it shouldn't be a big deal. Even better if enough of it is sticking out so you can grab it with some pliers or something
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Old 11-19-2004, 04:14 PM   #7
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Quote:
Originally Posted by faisalmali
Yep. Mine just failed too. Replacement is metal. I paid $25 Canadian at the dealer. The hose is $21 Canadian, but I am going to try to use a 5/8" heater hose (doing it this weekend).

They have these in metal? The dealer I deal with doesn't have a metal one (I inquired when I had to buy a new one). I'm gonna cheak another dealership. Metal would be much more durable..
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Old 11-19-2004, 04:15 PM   #8
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Don't know about later years, but my 93 is is a threaded fitting so it should be easy to remove with a socket.
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Old 11-19-2004, 04:26 PM   #9
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Quote:
Originally Posted by vital49
Quote:
Originally Posted by faisalmali
Yep. Mine just failed too. Replacement is metal. I paid $25 Canadian at the dealer. The hose is $21 Canadian, but I am going to try to use a 5/8" heater hose (doing it this weekend).

They have these in metal? The dealer I deal with doesn't have a metal one (I inquired when I had to buy a new one). I'm gonna cheak another dealership. Metal would be much more durable..
Yes, it'* pretty strong now. Part #88891743. I don't have access to a dig camera, otherwise, I'd post a pic.

Check BigJ'* response on the attached:

http://www.bonnevilleclub.com/forum/...ant+elbow+part
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Old 11-19-2004, 04:27 PM   #10
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Thanks a lot guys. Yea, mine seems to be broken flush with the block. I guess it wouldn't be easy. Oh well. How does it work, Is it threaded so I have to turn it, or do I just pull it. I am sorry for the silly questions, but I don't know a lot about these engines.
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