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Old October 14th, 2020, 04:11 PM
IslandGMCguy IslandGMCguy is offline
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Default 1966 GMC 910 V8 radiator cap

Hi all I have just gotten a 1966 GMC 910 1/2 ton stepside pick up. It’s the Canadian built model with the Chev 283 V8 in it. I am wondering what is the correct radiator cap pressure. Is it 7 or 13 lbs. it has the stock radiator in it. Thanks.
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Old October 15th, 2020, 09:40 AM
George Bongert George Bongert is offline
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Default Re: 1966 GMC 910 V8 radiator cap

Greetings IslandGMCguy!

It most likely is the 13# pressure cap. the 7# caps are for older vehicles, and have pretty much gone the way of the Dinosaurs. Other members, please correct me if I'm wrong on this one.
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Old October 16th, 2020, 12:32 AM
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AZKen AZKen is offline
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Default Re: 1966 GMC 910 V8 radiator cap

I agree with 13lb. Temp gauge is to be monitored.
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