Gunk coolant reservoir

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Dumbitfown4me, Oct 17, 2020.

  1. Dumbitfown4me

    Dumbitfown4me Bobtail Member

    25
    14
    Aug 20, 2019
    Phoenix
    0
    What is the gunk attached to the top of my coolant reservoir??? There is no layer of oil directly on top of the coolant checked with paper too. I sat all nigh with ignition off so I expected there to be oil on top of coolant not sure what my problem is.
     

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  3. uncleal13

    uncleal13 Road Train Member

    3,797
    6,297
    Apr 9, 2009
    Humboldt, Sk
    0
    Mine was fuel, leaking injector cup seals.
     
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