Bill
Thanks for the advice but I had already purchased a can of rad flush and started doing it before seeing your post. I spoke to a local radiator shop last year about cleaning my gas tank and he told me that they are now greatly restricted in what they are allowed to use for cleaning gas tanks and rads so that may no longer be a great option. If I continue to have difficulties, I will take the rad there to be cleaned by them however. I have never been a believer in putting lots of paint on a radiator as it will simply act as an insolator when you actually want good heat transfer.
I dumped my
antifreeze, put the rad flush in, ran the engine, dumped it out, refilled it with clean water, ran the engine, and repeated this several times until the water came out perfectly clean. I looked in the rad and it sure appears to be much cleaner than before I started. I refilled it with a 50/50 blend of
antifreeze but I haven't driven it yet.
Wayne