Possible coolant leak?

[Chris Stewart]

Nope, the heater core gets water all the time the motor runs. Another option is to take the heater hoses off the motor and connect a single hose on the motor water outlets...until cold weather arrives.

[Toolwise]

well, what I meant was when adding Bar's Leaks to the radiator system, do you have to have the heater on for it to properly stop the leak.

[Toolwise]

more good news is I removed the cover and some other parts of the lower dash, and have verified a small pinhole leak in the heater core. So, because I have had these coolant spots on the carpet since I bought the car, I believe the dealer used a leak stop to disguise the issue. I'll do the same thing untill I get around to buying a new heater core and replacing the old one.

[Toolwise]

well, the stop leak worked, but I won't go for too long without buying a new heater core.

[Chris Stewart]

Very good. You also know how to get the heater core out to replace it later. Now if we could just find someone who builds a really reliable heater core with enough brass to last more than a coupla years...venders, are you listening?

[ericn1300]

Originally Posted by Chris Stewart

Very good. You also know how to get the heater core out to replace it later. Now if we could just find someone who builds a really reliable heater core with enough brass to last more than a coupla years...venders, are you listening?

Amen to that, Chris. And fuel pumps. I've had to change both of them out on 3 of my GM's. The only one that is still origional is on my 1950 gmc half ton, 55 years and still going strong so I know it can be done.

A word of warning Toolwise, be sure to check for antifreeze under your carpets and in the heat insulation under the carpet. It will off gas and coat your interior and windows with a greasy film. Just flush it with lots of water and maybe some Dawn dish soap and suck it out with a shop vac.