2007 savana coolant and oil mix

[gmcowner]

I have the 6.6 lmm diesel motor and i recently found oil mixing with the coolant.. What could be the cause of this?

 

[Smoky02]

Bad intake manifold gasket, head gasket(s), or cracked block, cracked head(s), overheated engine causing head to warp and last not least bad radiator. So as you can see there are many possiblities. This is way too difficult to try to tell from the info that you have provided and without see the vehicle.

 

[happy 2011]

oil mixing in the coolant is a bad radiator. Replace the radiator and flush system well and you will be fine.

Bad intake gasket will put coolant in oil not oil in coolant. Cracked block will put coolant in oil not oil in coolant. Warprd heads will put compression in coolant system not oil in coolant.