Engine oil is getting in the radiator of my 2016 Holden Cruze
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Asked by Brian
I'm getting engine oil in the radiator of my 2016 Holden Cruze station-wagon. It has just had a new head and new oil cooler. Any ideas?
Answered by CarsGuide
30 Apr 2024The first conclusion many mechanics will arrive at is that the engine’s head gasket has blown, allowing the oil and coolant to mix. Have a look at the dipstick. If the engine oil is milky, then this is a very real possibility. Perhaps when the cylinder head was replaced, the gasket has not sealed properly.
But if the oil cooler was replaced because it was leaking into the radiator (which is pretty common) then you might find that the oil you’re still seeing is just residual oil from the previous failure, and not a problem at all. Even so, it would be wise to replace the coolant and flush the system to try to eradicate all traces of the old oil.
A workshop can perform a chemical-based test to see if the head gasket is leaking. It’s worth the relatively small cost to rule this out and begin to look elsewhere.
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