steve87iroc

iTrader: (1)

heres the problem the blower motor works fine but blows out cold air. the vent door works fine. the heater hoses going to the heater core are not even geting hot at all so i changed the core and there are still not geting hot. the engine runs normal operating temp. the heater core hoses come from the top of the water pump and the other to the top of the radiator. no control valve. i noticed a small leak in the top of the radiator only drips when i turn the engine off. another thing is that i can even take off the radiator cap at 210 degrees and there is no pressure. coolent is full any ideas i hate when things go bad right befor winter.

frirebird952

hi my car had a prob kinda like that mine you could take the cap off with it at 200 deg i found it was the cap it wasnt sealing and letting the preasure bleed off i got 3 new caps from advance still had the same prob finely took the rubber seal off another cap put it in the filler neck then put on my cap now it builds presure and my heat works i went to chev dealer my freind there said it was probthe cap i guess try that i worked at chev dealership for 15yrs never seen that prob before