quote:
Originally posted by DJEZC:
Ok so I finally try to run the car for an extended period since putting the engine in. After about ten minutes it starts to overheat.
After trouble shooting the system I checked the thermostat and it worked correctly. The fans were not working and they have now been fixed, but I also discovered that the pressure cap was not working.
I have heard the the caps do not always have the correct seating and therefore pressure with some pressure tanks. I have a Hall Stainless Steel tank. How do I make sure the cap is seating correctly?
Take the cap off and look at the gasket seal on the bottom. If it is making a groove all the way around, then it is seating correctly. I have a Hall tank that came with a special plastic cap that was rated for about 16 to 18 psi. If that is the same tank that I have, then a conventional cap will fit it.
You need pressure on the system to keep it cool, but around 15 psi is more than enough. The bottom line is that if it is overheating at low speed, then it is an air flow problem and if it is at high speed, it is a coolant flow problem.
