Re: Foaming coolant under heavy load, bad head gasket?
Test the coolant for combustion gases. There are simple test kits available here at auto parts stores that are pretty inexpensive. I would think that they would be available there.
It is a liquid that with the engine running you pull the air off of the top of the radiator through the liquid turning it a different color if gasses are present.
It will almost surely answer the question as to if you have exhaust gas leaking into the cooling system.
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Dave / Lincoln Nebraska
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