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Old 06-16-2021, 11:14 PM   #2
dmjlambert
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Join Date: Apr 2016
Location: Cypress, TX
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Re: BBC temp creeps at idle; how did factory do it?

My truck is close to stock with a 350 and I can idle it or drive it down the highway, winter or summer, and the temperature stays rock steady all the time. So I think if you have a working system it should idle fine.
You didn't mention, do you have a thermo fan clutch? Is the water pump old? Is the radiator cap new or the original old one that came with the used radiator? Is your distributor vacuum advance connected to manifold vacuum or ported vacuum?
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