Ford fuel in oil system

Some engine problems are sleeping giants...

And are difficult to diagnose with out some degree of engine tear down. A customer brought in his newly purchase used Ford 6.0 with some preventative maintenance and upgrades in mind. Once our mechanic started removing some of the accessories he discovered a messy problem.

Fuel in the Oil System

It's the only way to explain the shredded silicone gaskets, spotty oil and the tell-tale smell of diesel in the oil pan.

Shredded silicone gasket

A large piece of the gasket and small debris left on the block

oil screen in the main oil supply completely full of gasket debris and handle for screen expanded and disconnected from tray due to fuel

In many instances a pre-buy inspection can save you on some major repairs, but this truck would have required a very extensive inspection and testing to really catch the depth of this issue. 

This truck came in with no complaints to it's performance, the customer wanted to "bulletproof" the truck by doing the bulletproof oil cooler, new head gaskets and ARP head studs. If the customer hadn't been ready to do those upgrades it might have taken a while for these problems to make themselves known on their own.

side of block caked with oil

rear main seal leaking- likely because of fuel contamination

Fuel bubbles can be seen in waste oil bucket

Fuel contamination can be seen and smelled in oil pan