I pressure washed top and bottom of engine to try to get to the bottom of some of my oil leaks. I have noticed a fairly large oil leak on the back of the engine head somewhere around the area where the oil feed line line to turbo is attached to the head with a bolt has anyone ever had a oil leak in this area, the oil appears to run down trans bell housing between the solonoid for the starter. It is very hard to see because of the location to the firewall could this be a head gasket leak?