Coolant on intake

[whitecobra98]

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?

 

[Nick Micale]

Start by checking the heater control valve on the pass side rear of the intake.

 

[1fastcobra]

Ck the 2 small lines going to the t.body .

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[Heisenberg]

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.

 

[precizion818]

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.

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[Jay J]

My heater control valve looks like the pic that Heisenberg posted. Where to buy?

 

[1fastcobra]

My heater control valve looks like the pic that Heisenberg posted. Where to buy?

Any auto store

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[Jay J]

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

 

[earlbrown]

The one you find at McParts will be plastic, not metal, but it'll work just fine.

 

[TLIMITED]

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

I think Kirban,Highway Stars etc.has the AC Delco valve.