boiling after 3 miles but...

Moparbaker said

Thanx, I'm gonna look over the stuff tomorrow, gotta be something that's wrong with the cap since it aint letting any air out. I reckon the spring is way to hard, it feels harder than other cap's springs I have laying around, but sadly they don't fit.

Click to expand...

There are two types of caps at the parts store; those for the older puke-systems, and those for the recirculating systems. And they can both be had in a multitude of pressure ratings. Be sure your expansion tank is matched to your system. In the recirc type, the hose has to draw from the bottom of the tank. The tanks usually have a pick-up straw cast integral with the tank, and an external nipple connected to the straw. You can convert an older tank simply by drilling the plastic cap and stuffing the hose all the way down to about 1 inch from the bottom.