Another Cooling question

[JFP in PA]

Originally Posted by pilut2

Update: I can not hold vacuum in the tank it seems to be sucking around the pressure relief valve. A visual inspection of the tank doesn't reveal any cracks or leaks. The trunk has always been dry. When hot, the tank is above the full mark and coolant occasionally drains out of the black hose ahead and above the right rear wheel. If I blow into the tank it will not hold pressure, i can hear air leaking out- again it seems to be leaking through the pressure relief valve. Is it possible my valve is shot? The car has about 40,000 miles on it

Your own tests say it is shot...............................

[pilut2]

Originally Posted by JFP in PA

Your own tests say it is shot...............................

Should I replace the whole valve or try the o-rings first?

[JFP in PA]

Originally Posted by pilut2

Should I replace the whole valve or try the o-rings first?

Depends upon how cheap you are and how much you like taking things apart multiple times before you solve the problem. Replacing the unit with a factory part (not an aftermarket version) gives you a new everything.