Grounding is definitely critical any time you have aluminum heads/ aluminum radiator. Yeah if you dont ground properly, you not only get problems with the radiator itself, but problems in the cooling passages of heads too. I've posted this before but old buddy Danny didn't ground his small block 350 Chevy motor, and wondered why he was starting to overheat in hot weather. He did all the obvious stuff, thermostat, radiator new water pump,etc. Well he had to pull his aluminum Intake off for some reason, I forget what. You should have seen how plugged the cooling passages were after only 10 k. Cleaned out Intake, got ground straps, and voila, no cooling issues after that. Tom's case though I think is just due to cheap manufactures. Tom if you have a radiator shop near you, you might want to have them build you a good one, like Ron Davis quality. It won't be cheap, probably around $700.00 clams but it will be good. You might want to also call Ron Woods and see how much a customer built one is. I'd sure get tired of yanking it every year. Coolant is so expensive these days.
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