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

Tell me when this thread is updated:

Subscribe Now Add to my Tracker

Add your comments below

Characters left: 4000

Please note by submitting this form you acknowledge that you have read the Terms of Service and the comment you are posting is in compliance with such terms. Be polite. Inappropriate posts may be removed by the moderator. Send us your feedback.

Caterpillar Discussions

Title Updated Last By Comments
Cat engine 3126 (Oct '06) 6 min jom 681
Increase maximum RPM in C15 Sun SuperTruck 1
water leaking out of radiator cap (Jul '11) Jan 25 P_SELVAM 7
how to hack caterpillar ecm (Nov '08) Jan 21 davewilson 48
Caterpillar C15 Engine TPS error code (May '09) Jan 21 junktrucktrucking 56
6 nz Jan 19 dan 1
Roll coal in c12 &c15 Jan 18 Cavill 1
More from around the web