Coolant on intake

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whitecobra98

Member
Joined
Dec 6, 2006
Messages
738
changing the oil on my gn I noticed coolant pooled up on back of intake..couldn't see anything leaking while it was running..have smelled coolant after a long ride b4..where to start?
 
Start by checking the heater control valve on the pass side rear of the intake.
 
Ck the 2 small lines going to the t.body .

Posted from the TurboBuick.Com mobile app
 
I'd start with a few of the usual suspects:

The twin Coolant hard lines that go from the "Z" hose on the water pump - along the intake manifold and back to the heater control valve
Then - the heater control valve
Then either of the three "J" hoses that are back there
Then - either of the two smaller hoses that feed the throttle body hot water.

Chances are high that the larger hardline has spring a leak.
If it is stock - they are made of standard steel - and rust from the inside out.

Replace with a stainless unit from Gbodyparts
I prefer to buy the one that deletes the TB lines.
 

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X2 on throttle body lines!
I had a piece of hose on mine looping the nipples on the hard cooling lines together and it developed a leak that you could not see, but puddled on the intake when the car was running.

Posted from the TurboBuick.Com mobile app
 
My heater control valve looks like the pic that Heisenberg posted. Where to buy?
 
Thanks. I am not used to going to a "fast food parts store" as Earl calls them, and finding much of anything for our cars...lol
 
The one you find at McParts will be plastic, not metal, but it'll work just fine.
 
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