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H6 head gasket sealer?


markrw1
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Hi I have a 2006 H6 OB which I'm fairly sure the head gasket is going. I've had the thermostat replaced with an OEM but I get overheating on loading like hills or speed. It will run just about ok round town and will idle forever without problems. However I'm getting a few bubbles in the overflow. It's done 186k but was hoping for more as I know its a fairly bomb proof unit. 

Has anybody had any luck with gasket sealers such as Steel Seal etc. ? It doesn't do big miles but I'd like to try and get some more life from it as it's a great car.

Any advice appreciated.

Thanks

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I have only read bad things about liquid gasket sealant and the subaru product steer well clear - blocked coolant passage ways leading to engine destruction

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OK thanks - doesn't sound good. I've heard drilling holes in the thermostat is also a temporary work around?! I'm not in the market for new engine or full repair just something to keep it on road.

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On 9/8/2021 at 12:13 PM, markrw1 said:

OK thanks - doesn't sound good. I've heard drilling holes in the thermostat is also a temporary work around?! I'm not in the market for new engine or full repair just something to keep it on road.

I am not sure how drilling the thermostat will help as it already has a small hole to enable a little flow when closed and when heating up it will open fully so as soon as it gets warm you will have full flow to the radiator.  Is it possible you have and airlock in the system?

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