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M35a2 fuel in oil

bassetdeuce

bassetdeuce

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stumps said:
Cool!

I would bet that the PMCS depot has a huge tank full of 15W40 oil with an electric pump on it. Someone probably wasn't paying attention to the meter on the pump.

-Chuck
Click to expand...
Yep. Never thought of that, but I'd bet that is what happened. I was concerned about the rear main seal after that fiasco, but I drove it another 550 miles and the oil level stayed normal. Also, I didn't notice any diesel smell on the stick after the trip, so I don't think I was "making oil" at a rate that would match a leaky rear main. Oh well, interesting recovery nonetheless.
 
S

stumps

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Another way to end up a gallon or so overfull is to not drain both sumps on the oil pan, and then dump in the full 6 gallons.

-Chuck
 
m-35tom

m-35tom

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eldersburg maryland
a fuel leak that i have not seen mentioned is the booster pump shaft seal. these trucks are getting old and the seals are getting hard. mine was leaking so badly it was a trickle. just pull the pump out and run the in tank pump to confirm it is leaking. seals are about $6.

tom
 
T

tater575

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Alamogordo
My m35a2 has a very bad fuel leak (diesel) that is mixing in with the oil somewhere to the point it is dripping all over at a steady flow. My FDC was bypassed by the military when the truck was rebuilt so I know the problem cant be there. I have read about the Flame Heater being an issue, is there a way to bypass this and would it even be a cause for this problem? and how does a guy go about bypassing it if it is? I also was wandering if it could be an o ring or seal problem in the injection pump. I ordered a new injection pump seal and o ring rebuild kit just to be sure, but looking forward to hearing back from you guys. thanks
 
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wildbill88

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Illinois
m-35tom said:
a fuel leak that i have not seen mentioned is the booster pump shaft seal. these trucks are getting old and the seals are getting hard. mine was leaking so badly it was a trickle. just pull the pump out and run the in tank pump to confirm it is leaking. seals are about $6.

tom
Click to expand...
Where is the mechanical boost pump located and where did you get the seal a part number might also help
 
Breach27

Breach27

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Bentonville AR
Same problem here. I have disconnected the FDC, removed heater and replaced all three o rings. Next step is the booster seal. Fingers crossed
 
K

Ken Borrell

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Waverly, MN 55390
I have diesel fuel in the crankcase oil. Everyone seems to know the problem but what I am looking for is a step by step process to replace the o-rings. Is there such a site????Kenny B
 
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