A1EK

I flushed my coolant as it was full of sludge, two weeks later it's getting oily again but not quite as bad so I've flushed out for one more time today just to see if that helps.

As the oil in the engine looks OK and not sludgy and there is not any white exhaust smoke , I am suspecting a bad oil cooler could be the root cause. Can anyone tell me how to best check the oil cooler is okay and not leaking oil into the coolant water? Is there a rubber seal that should be replaced etc?

Thanks

quattrorings22

Here are the symptoms of a bad oil cooler.

1. Oil leaking from oil cooler
2. Engine coolant leaking from oil cooler.
3. Oil in the cooling system
4. Coolant in the oil.

https://www.yourmechanic.com/article...ing-oil-cooler

A1EK

I don't see any oil fortunately in the engine oil, but there is definitely oil in the coolant.

Do I need to be under the oil cooler to properly see leaks, of so will it be leaking at the seal between the filter?

Is there a seal that just needs replacing or should I get a whole new cooler? Thanks