ISX450 coolant issues
04-21-2020, (Subject: ISX450 coolant issues ) 
Post: #1
ISX450 coolant issues
Evening everyone I have 13 386 that I have always smell coolant but never find at one point the coolant went brownish black then last year head gasket went out decided to do a in frame 600 hp upgrade. Still could smell it would lose about a gallon between services (10,000 miles). I mainly smell it on the passenger side under door and inside cab but no coolant inside cab so assuming heater core is good just did a service and coolant is getting dark again it doesn’t smell burnt my mechanic is baffled anyone got suggestions . Thanks all
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ISX450 coolant issues - Chubbs68 - 04-21-2020



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