What is it and.... - 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 09-14-2004, 09:37 PM   #1
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Default What is it and....

I've got a coolant leak in my 95 SE and I know where it'* coming from but I'm not sure what it does. It'* a little plastic pipe with a 90 degree bend.... It seem to go between the intake manifold and the mount for the tensioner for the serpentine belt. It seems like some kind of bypass pipe. What is it and how hard is it to replace?
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Old 09-14-2004, 10:23 PM   #2
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Its called a coolant elbow and it goes into your water pump. Only about $8, but usually its just the o-ring which is less than $1.
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Old 09-15-2004, 07:03 AM   #3
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I'm guessing it'* the O ring. How do I get at it? Do I have to pull the water pump?
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Old 09-15-2004, 09:11 AM   #4
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To change the coolant by-pass elbow you have to remove the lower intake manifold, which involves removing the upper first. It'* a precise fit and which requires the lower to be removed. Dealer sells them for $7.60! While in there, it'* a perfect opportunity to replace your lower intake gaskets too!
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Old 09-15-2004, 09:19 AM   #5
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mine didn't just loose the o-ring, when it was being pulled out, it lost all of the material past the o-ring with it... it was a little brittle.

anyhew, part number is 24503423 - that'* straight from the baggie, so it'* good. don't have a picture on hand of the coolant elbow itself that I pulled out.

but, as stated, it'* a great opportunity to do your lower intake gaskets (12537179) and your upper intake gaskets (89017554).
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Old 09-15-2004, 02:10 PM   #6
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Quote:
Originally Posted by vital49
To change the coolant by-pass elbow you have to remove the lower intake manifold, which involves removing the upper first. It'* a precise fit and which requires the lower to be removed. Dealer sells them for $7.60! While in there, it'* a perfect opportunity to replace your lower intake gaskets too!

What about going after the other end? Instead of pulling the intakes can you get it from the pump side?
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Old 09-15-2004, 03:54 PM   #7
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Quote:
Originally Posted by 95seand78z28
Quote:
Originally Posted by vital49
To change the coolant by-pass elbow you have to remove the lower intake manifold, which involves removing the upper first. It'* a precise fit and which requires the lower to be removed. Dealer sells them for $7.60! While in there, it'* a perfect opportunity to replace your lower intake gaskets too!

What about going after the other end? Instead of pulling the intakes can you get it from the pump side?
I've never tried to replace it from the tensioner side. I'd have to look at it more closely to see if it'd be easier. Do you have a FSM, Chilton'* or Haynes manual that you could look in? The dealer could probably tell you what route they take when they have to do it for a customer, too.

Mine never broke, but I changed it as PM when I did my lower gaskets and upper intake.
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