I'm not sure if any of the testing labs might be able to take a sample of the coolant and identify what type of oil (ATF, motor oil, etc.) is present. In the US there's companies like Blackstone Labs and others that can do an analysis of the motor oil and this will often show if even tiny amounts of coolant is getting into the engine oil well before it becomes a milky sludge. It would still be a possible source if you have a trans cooler in the radiator or oil-to-coolant heat exchanger you've ruled out.Īnother test you could do is to send a sample of the engine oil in to an independent testing lab for a used oil analysis. Other most common source for oil getting into coolant system would be a head gasket leak, but with modern multi-layer steel head gaskets they usually don't weep oil to coolant passages and vice versa but instead normally fail catastrophically. However, its not a picky beast just about any generic coolant either pre-diluted or mixed 50/50 with water should work. Based on my reading it sounds like it could be the coolant. 1.4 ECO - Thermostat Swap - 221F to 176F Chevrolet Cruze Forums () I don't know exactly where it's leaking from but the coolant reservoir was almost empty and yes there is spots where I park. The 2012 Chevrolet Cruze uses Dex-Cool coolant, according to General Motors. At 141k I got the parts and replaced all. Figured it was the coolant leaking into the oil from the leak in the oil cooler gasket. Average repair cost is 750 at 56,150 miles. While waiting for parts, I noticed a very small amount of chocolate milkshake on the oil cap. The 2012 Chevrolet Cruze has 1 problems reported for engine oil mixing with coolant. Around 140K, I noticed coolant leaking and found the leak at the oil cooler. I see there is a million posts about this problem but I don't see where anyone found the fix, I just see everyone complaining about the same issue I have. 2011 Chevy Cruze 1.4L with 142k miles on it. Since you're in the UK and I'm not sure which powertrain you have and if it's applicable, if your car has an oil-to-coolant heat exchanger those can also leak internally and allow oil and coolant to mix.Ī cracked turbocharger CHRA (center housing rotating assembly) for a water and oil cooled turbo could theoretically allow coolant into the engine oil, but since the housing isn't pressurized with oil outside the bearing surfaces (and in fact would leak oil past the dynamic seals into the compressor and turbine wheels if the CHRA were pressurized with oil), you wouldn't see oil getting into the coolant from a turbo problem. So I just started to get the oil/antifreeze/burning stench in my Cruze about 2 weeks ago. Hello I have a 2012 Chevy Cruze 1.4 and I'm having this obnoxious problem with the oil going into the coolant resivour, the car does not overheat or no white smoke from the exhaust, about 2 months ago I had taken it to the shop and replaced the oil cooler gaskets and flushed the old antifreeze and still oil. A leaking internal trans cooler inside the radiator could allow transmission fluid into the coolant.
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