Quote:

How much use on the bottom end?(miles years)
How old is the rad.
I had a real over heating problem with my big block, and found the cure was in cleaning out the frost plugs and power washing the coolant passages and re coring the rad.
I thought I had re cored the rad the summer before but when my friend and Mechanic took it to his rad guy they told me that my rad had just been cleaned and painted.( it was full of stop leak all thru the engine from the old guy before me trying to stop the heater core from leaking)
Find I guy you can trust.
Thats the hardest part of all we do.



I agree with this guy.

If you haven't had that block chemically hot tanked, and the block is older than dirt, you are likely to find "mung" of the years clogging up the coolant passages and the radiator. Hard to describe, but think of jellied chemicals throughout that mill's water jackets. A viscous, crummy goop is the best description.

Seen it, done that, etc.