05-06-2009, 05:13 PM
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#1
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Registered User
Join Date: Aug 2007
Location: Central Michigan
Posts: 42
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Info needed (over-heating issues)
Hello all,
I have a 1969 GMC w/402 BB. . . and she runs a little hot. We've added a ton of performance parts, but the HP hasn't increased so much where my stock 4 core shouldn't handle it. I've put a new thermostat on, all new hoses, new water pump, and have pulled the radiator (clean as a whistle) I have two questions before I pop a gasket myself!
What is the correct pressure rating for the radiator cap? (I suspect I running one that's too low.)
Also, what is the right size (diameter) of the stock water pump & crank pulley? I think it may have been changed out to a larger one along the line somewhere.
Thanks for any help. . . .
![Gmc2](http://67-72chevytrucks.com/vboard/images/smilies/gmc2.gif)
JH
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