New answers tagged subaru
Your AirCon compressor will cycle on and off, partly as a pressure control procedure. It will also cycle off on a full throttle. These cycle operations are usually imperceptable to the driving experiance.
In direct answer to your question... no, there's probably nothing you can try before you invest in a head gasket. There are two possibilities here. No, there are three. First is that your motor oil is entering the water jacket through a breach in the head gasket - the motor oil is under higher pressure than the coolant should ever be, so it'd pressurize ...
It's most likely a headgasket. When they fail in a certain way, they allow exhaust gases to get into the coolant circuit instead of escaping out the exhaust valves like the Lord intended. Only way to be sure is to have a compression test done by a workshop. If you're lucky, they'll do it for free, otherwise it's not an expensive or long procedure. They just ...
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