Hi guys l have a GQ 99 2.8 diesel turbo and have a lot of oil in cooling system.
When it happened l opened up coolant bottle and a lot of oil came out and is through the cooling system. A friend said may not be head or gasket , could be the oil cooler so l by passed it and have been flushing the water .lm still getting oil in water . Could it be old oil in water jackets in cooling system.
Any suggestions would be great thanks