99 cat C12 is pushing oil into the coolant

Trade it for a c15

 

Few things it could be.

Water pumps on those C12s are known to the point of notoriety have a seal go out and leak oil into the coolant. Next could be a bad head gasket. I THINK there was an updated gasket seal recall at one point? I know when i worked for a company that had 2 dozen C12s every single one od them went in at the same time for new gaskets.

Finally could be a bad liner. Check the waterpump first. Then if that wasnt the issue pressure the system and have them pull the pan to see which hole if any coolant is dripping down. If coolant pouring out of a cylinder odds are theres your liner. Or you will be able to find the break in the head gasket.

Im not super experinced with the C12s but i do remimber those being the number one issues. That said....the above comment is the most correct C12s are pretty underpowered in many tasks and a C15 is a better all around engine. But if your stuck or happy with what ya got my advice will at least send you in the right general direction.

Also make sure to clean the system really good and just replace the hoses. Even if you clean them up once you get oil in the coolant them hoses nearly always fail shortly afterwards in my experince. Cheaper to do it while they are pulled apart anyway....plus no risk of dumping your coolant on the road.

 

Put an oil cooler on it. Do you need an address to send a thank you card?

 

I'm not smart enough to reply.

 

smart guy would tow it case closed.

 

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Then why'd you ask us?

 

...for entertainment