Battling overheating new 360 build

charles mill said

as one person said . spring maybe. 22 as compared to a 26 rad. first clean all 8 fan pump great. clutch fan great. if that does not work u got nastyblock. u r rebuilding ? so u screwed up. 2 dollars more . and get a new FAN CLUTCH. f the blade fan. clutch fan kicks in at temp needed. the fan I see one blade can come off and fuc? up life. flush or replace rad. is prob go stock and sue me if I me b wrong.

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This is a completely rebuilt engine and it cools great at idle. The more I read the more I don’t believe I have a fan issue. The car stays cool at idle or during warmup on fast-idle. It overheats under load which seems like more of a heat-soak issue due to inefficient flow or to excess temps that could be timing related.

I’ll be starting with timing reduction tomorrow. If that doesn’t do it I’ll be pulling radiator and replacing with an aluminum unit