C-15 blowing oil from dip stick

Posted in the Caterpillar Forum


Medicine Hat, Canada

#1 Nov 13, 2011
I have a C-15 6NZ that we just replaced #2 hole with an OEM cylinder pack and now the engine is blowing oil out the dip stick tube engine runs awesome otherwise, Can anyone help with this problem?

Sugar Land, TX

#2 May 14, 2012
sounds like your blowing compression into the crank case. possible the orientation of the rings on the piston could be wrong if you put a piston pack into the engine. possible valves may not seat properly on the cylinder head or turbo seal is leaking boost into the oil return line or just the breather is clogged

United States

#3 Feb 22, 2014
My c15 is doing same thing and only have about 62 pounds of oil pres could that be the tourbo or a ring broke

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