Why does my C220 not have an oil cooler?
C220 as standard is not fitted with an engine oil cooler. I have just gone through the worst journey with the same symtoms. I took my ’96 C220 to the Mercedes stealership with concerns of oily foamy stuff in the coolant resevoir. The mech said it could be tranny fluid leaking in from the radiator or engine oil from the head gasket.
Can a radiator leak oil but not coolant?
Yes, oil can leak into the cooling system but that does not mean coolant will necessarily simultaneously leak into the oil. For example, if you have an oil cooler inside your radiator and that starts to leak, you will find oil in coolant but not necessarily any coolant in oil. This happened to me recently on my ’94 Suburban.
Why is there no coolant in the oil?
When the engine is restarted the cylinder heads and intake manifold expand faster than the cooling system pressurises so no coolant leaks into the oil. If neglected long enough it will either leak coolant into the oil or will leak externally.
What does oil in coolant C220 1996 mean?
I took my ’96 C220 to the Mercedes stealership with concerns of oily foamy stuff in the coolant resevoir. The mech said it could be tranny fluid leaking in from the radiator or engine oil from the head gasket. Hoping for the cheaper solution he pulled the rad and sent it to another shop for pressure testing.
Yes, oil can leak into the cooling system but that does not mean coolant will necessarily simultaneously leak into the oil. For example, if you have an oil cooler inside your radiator and that starts to leak, you will find oil in coolant but not necessarily any coolant in oil. This happened to me recently on my ’94 Suburban.
When the engine is restarted the cylinder heads and intake manifold expand faster than the cooling system pressurises so no coolant leaks into the oil. If neglected long enough it will either leak coolant into the oil or will leak externally.