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Replacing leaking coolant line

Tiny
JOSHUA D CLARK
  • MEMBER
  • 2005 BUICK RENDEZVOUS
  • 3.4L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 221,379 MILES
The coolant line that runs between the intake manifolds is leaking where it goes in to the intake by the throttle body it basically just falling apart. Do I have to take the upper manifold off to do this repair or is it okay to bypass going where the old line was and get some rubber heater hose and make my own way?
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Tuesday, November 3rd, 2020 AT 3:32 AM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

I attached a picture to see if they are the lines for replacing that you are referring to.

I would not use just rubber lines due to the heat of the engine and the small hoses could cause failures in the hose.

https://www.2carpros.com/articles/radiator-pressure-test

https://www.2carpros.com/articles/car-is-leaking-coolant

Roy
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Tuesday, November 3rd, 2020 AT 4:24 AM
Tiny
JOSHUA D CLARK
  • MEMBER
  • 4 POSTS
Umm, the picture is kind of blurry the best way I can describe it, I removed the air box, throttle body, and of course all the sensors in the way. The line I'm talking about has a 90 degree turn where 90z down into the lower manifold and runs down to the opposite end of the motor where it comes out in a opening between both manifolds and hooks to a rubber house that is connected to the bypass coolant line that runs along the front of the motor and to the heater core on the fire wall with the quick couple high pressure fitting on it.
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Tuesday, November 3rd, 2020 AT 5:24 AM
Tiny
JOSHUA D CLARK
  • MEMBER
  • 4 POSTS
I have looked everywhere online and can't find a name for this line anywhere, I don't have a Haynes manual to check I'm sure the answer is in that.
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Tuesday, November 3rd, 2020 AT 5:25 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Can you please upload a picture of the line?

Roy
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Tuesday, November 3rd, 2020 AT 5:27 AM
Tiny
JOSHUA D CLARK
  • MEMBER
  • 4 POSTS
It's the line running right down the middle of intake.
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Wednesday, November 4th, 2020 AT 10:44 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Thank you.

The line is discontinued for GM. There is no one in the aftermarket that I see that makes the line.

As far as replacing it with rubber, you will need the part of the line that attached to the lower intake. That way you could attach a rubber hose to the fitting and run it to the heater core hose.

Roy
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Wednesday, November 4th, 2020 AT 12:10 PM

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