Oil in Water Coolant The Definitive Guide to Contamination Monitoring and Control

It's clearly oil, and there is only enough of it to rise to the top of the coolant and stick to the cap and get purged into the overflow tank ... I have a 09 Beetle, my mechanic called me with my issue and it was a failed oil cooler. I had oil in the coolant and the car overheated. Coolant and oil mixing is a bad sign. This is because it usually points towards the failure of an important part in your engine/cooling system. An oil/coolant ... Engine coolers use fluid, which can be either coolant or water, to maintain the optimum temperature of the engine. Regardless of the fluid you are using, its ... This happens because the o ring seals on the water pump have gone bad and turned hard as a rock and because of the seals can no longer separate ... The water in oil is a bigger concern. The kneejerk answer is to say “cooler cracked” because that absolutely would let those fluids mingle. A mechanic told me that it could only be from a leaking head gasket. I'd like to rule out the possibilities that it could be oil leaking into ... You can refill cooling system with a dishwasher detergent/water mixture (like Cascade) and run that for a few minutes, then drain and refill ... You are correct, the two places pressurized oil could enter coolant is the turbo and oil cooler. Typically it's an oil cooler failure. If the ... Seller reports it started putting oil in the coolant several weeks ago and overheating. Seller pulled heads but did not see any signs of head gasket failure.