Dark coolant and fuel CM871
01-04-2022, (Subject: Dark coolant and fuel CM871 ) 
Post: #3
RE: Dark coolant and fuel CM871
Also smell the oily substance. Sometimes it will be transmission fluid if the truck is equipped with a heat exchanger for the trans. Though the oil usually presents as a grey brown color, black is not out of the question. It will smell strong like gear oil.
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RE: Dark coolant and fuel CM871 - Chamberpains - 01-04-2022



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