Whats a MACH Z
Hi Bruce, I must admit, I am not sure what a MACH Z is,
You might check kinked hoses under operation- soft, also perhaps a water leak at the pump seal causing air leak on cavitation side,
You need to run a 50/50 mix of coolant, if not sure **ain completely, and start fresh . Additives do a little for help but the engineers built those to run, so unless you blown a head gasket, low water etc. you problems are not vehicle specific in my opinion . GFood Luck
From teh saddle
Bill
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