Unveiling the Mystery Oil Contamination in Coolant Reservoir

Clean the coolant tank out with brake clean or engine degreaser, then follow up with dish detergent (that will remove all the oil residue). Let ... The ONLY place I'm finding oil is IN the antifreeze coolant reservoir. Just to clarify: 1. There is NO power loss at all. The car feels and performs great. Share your videos with friends, family, and the world. When a head gasket fails, oil can leak into the cooling passages and then end up in the coolant. This results in the brown sludge that can be seen in the top of ... Wouldn't oil in the coolant circuit tend to lay low (as in more dense) instead of showing 'up' in the overflow tank ? Either way, this would ... I have asked an "Audi specialist" garage for an opinion on the oil in the expansion/coolant tank. They believe the oil cooler to be the most likely fault. Blown head gasket\cracked head if you're not getting a CEL with a miss. Oil and coolant only combine into that nice brown goo under high ... Seems to be running and idling well, temp normal. Light brown oily mousse in the radiator and overflow reservoir. Engine oil is normal. I have an L322 HSE 2008 4.4 V8 i found oil in the coolant reservoir. I've changed the oil coolers and hoses and it happens again 6 months later. Damaged head gasket · Faulty Oil/Coolant Heat Exchanger · Cracks in the cylinder head · Cracks in the engine block.