Oil in Coolant Reservoir An Engine's Silent Cry for Help

The diagnosis was that the oil cooler was leaking oil into the coolant. The oil cooler is part of the oil filter housing. they did install a new ... GL 450 2007. It's still drivable. I just got an alert yesterday that coolant is low. Is this an expensive fix ? Then flush your coolant and do an oil change. If you suspect you have an issue with your head gasket, do a compression check. Check your hoses ... If there's oil in the coolant reservoir it could be a head gasket. If you open the radiator cap with the engine cold is there oil present under it? Engine Oil in Coolant Reservoir - Can the Engine Oil Cooler Leak Into the Coolant? ; EUROW. 446 posts · Joined 2022 · #2 ; mschwab327. 169 posts ... The coolant reservoir was leaking a brown liquid. I guess this is oil and i have heard that means its most likely a blown head gasket. If you have oil in the coolant reservoir, then it means you have leaking head gaskets and oil is moving into the coolant and/or coolant is moving into the oil. Instead of liquid soap, I would use baking soda and water. I would mix the baking soda and water in a 5 gallon bucket and I would add enough ... There's evidence of oil residue in the coolant overflow tank in my 2012 Outback 3.6R. It has 150K miles, and has been dealer maintained. It seems that one of the aluminum heads developed a pinhole leak in one of the STEEL freeze plugs, which then leaked water into the crankcase ...