Posted by Bobl1958 on August 16, 2015 at 10:25:37 from (70.195.9.123):
I bought a 1968 Ford Mustang with a 302 v8. When driving it wants to build pressure in the radiator and blow out the radiator overflow around the rad cap. I bought a new 13 psi cap, but they also showed 16psi caps, but we're out of the 16 pound caps.
I put the new 13psi cap on and drove about 8 or 10 miles and pulled back into the shop. Shortly after shutting it off it popped off and blew out the rad overflow. It was steam coming out.
The temp gauge doesn't show hot and appears to be working, but what is causing this overheating?
Would a head gasket cause this? I changed plugs and the old plugs looked good. Maybe the old radiator needs attention. Would it need a 16psi cap? Any thoughts? Thanks in advance for any help. Bob
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