So, this weekend I did a Muriatic acid flush on my late model Atomic 4 and then proceeded to do the pressure water flush with a kit purchased from Moyer. That was a pretty tough/time consuming job and I'm sure glad I'll only have to do it once every three years! 2 questions. When I flushed the aft section of the block (water intake in aft drain hole), the discharge water ran perfectly clear - no crud at all. When I flushed the forward section, it was so plugged that I only got a trickle of water at the discharge hose. After probing in that hole with a coat hanger and flushing again, it worked and a bunch of black crud came out. Is that normal to have one section of the block run clear and the other be filled with crud?
Also, the previous owner of this engine flushed the block with 2 gallons of straight vinegar twice a year using a T valve arrangement. He only let it sit for about 2 hours each time. I was wondering if I can keep my cooling passages in better shape by letting 2 gallons of straight vinegar sit in the engine for about 12 hours twice a year. Is there any possible risk to doing this? I was amazed at what 12 hours of vinegar soaking did to my incredibly gunked up thermostat (it went from looking like trash to looking brand new) so I was thinking that it might really clean up the cooling passages of the engine too.
Appreciate any insight.
Also, the previous owner of this engine flushed the block with 2 gallons of straight vinegar twice a year using a T valve arrangement. He only let it sit for about 2 hours each time. I was wondering if I can keep my cooling passages in better shape by letting 2 gallons of straight vinegar sit in the engine for about 12 hours twice a year. Is there any possible risk to doing this? I was amazed at what 12 hours of vinegar soaking did to my incredibly gunked up thermostat (it went from looking like trash to looking brand new) so I was thinking that it might really clean up the cooling passages of the engine too.
Appreciate any insight.
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