Originally Posted by JimBlake
The radiator cap is what controls pressure in the cooling system. Isn't anyone gonna suggest trying a new cap??
The radiator cap doesn't control the pressure, it's only an emergency vent for when pressure gets to high. All it does is bypass antifreeze into the overflow bottle when the pressure gets excessively high. This saves the heater hoses from blowing, dumping out all the coolant, and leaving you stranded on the side of the road.
It does the same job as a pop-off valve (not to be confused with a blow off valve, they are different) in a good turbo system.
Originally Posted by Grifter
if i get the head off myself how much will the resurfacing cost?
I doubt it would be over $100. Hell, a used Tercel head should only be about that, and a rebuilt one in the $300 range.