MM GVI With Coolant In The Oil

skycarp · Jul 15, 2015

I have a '57 MM GVI that is showing coolant in the oil. Where is the most common place that this would be coming from? Where to start my search?

Thanks in advance,

Dean

Dieselbear · Jul 15, 2015

Try water pump seal first, would have to be 59 or newer

larry Mi · Jul 15, 2015

Water pump seal. I would try that first.

mmfan55 · Jul 15, 2015

Water pump seal is simplest, next head
gasket, then cracked head or jug

SWMolines · Jul 15, 2015

There is a weep gap between the water pump and the housing it mounts to at about the 6 o'clock position. Use a small screw driver to remove any grease and dirt that may be plugging weep gap. If coolant comes out of the weep hole, your problem is likely the water pump seal.

skycarp · Jul 20, 2015

OK, I found what appears to be green staining on the lower face of the pump to case shim, which would lead me to believe that coolant is leaking past the seal.

I need a source to purchase the seal, a set of shims and a cover gasket. Any suggestions, I tried NAPA with no luck.

TIA, Dean

BMG1 · Jul 20, 2015

Welters in Verona MO sells a rebuild kit for that pump. 417-498-6496.

MM GVI With Coolant In The Oil

skycarp

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