the oil cooler is leaking near the filter. im pretty sure its the gasket. how hard is it to replace and where can i buy a new gasket?

 

you can order from Cummins. Its pretty cheap. its a good opportunity to flush the cooling system while your at it. Its bolt on simple but there are o rings for the cooler that you might want to replace too. Is it leaking oil or coolant. I think the oil flows through the cooler and is surrounded by a jacket of coolant.

 

its a few hour job .. not too bad

 

5 min job when engine is out