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Re: gmc radiator pressure valve fix.
It's always best to start your own new thread than tack a question on the end of a 13 year dead thread. Folks will toss out an answer to the first post and never scroll down the page to see what you asked.
One thing, these old radiators and heater cores will handle 4 to 7 lbs pressure max before they fail. Add in that a 70 year old radiator has a lot bigger chance of failing. Even 7 lbs is pushing the limit.
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Founding member of the too many projects, too little time and money club.
My ongoing truck projects:
48 Chev 3100 that will run a 292 Six.
71 GMC 2500 that is getting a Cad 500 transplant.
77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.
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