There was some discussion re blown head gasket recently. Another list has has
the following
advise for years, and reportedly works very well. FYI.
Larry
Hans, Liquid dishwasher detergent can deoil the/block/head/cooling
system and citric acid (available where home canning supplies are sold)
are what are required. There are doubtless other products. THOSE work!
This procedure is NOT for routine use. Both are required if the head
gasket has blown (or oil from some other source enters the cooling
system) and the citric acid flush is required if the system becomes
clogged with calcium salts (or salts of other metals).
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