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T-Cut · 25th January 2020, 10:42

My 1.8T recently dumped the coolant into the sump. It wasn't overheated or stressed, it simply happened. Prior to that, I'd been topping it up with a cupful of coolant every couple of weeks. I knew something was wrong, but it happened before I'd a chance to work on it.

The problem was the OEM elastomer head gasket. The 'rubber' seals around the oil channels had simply delaminated from the metal. The fire rings were perfect.

With this sort of failure, you don't get pressurisation in the cooling system. It's very insidious because there are few outward signs. Mayo under the oil filler cap is one as is steam being emitted from the open oil filler neck when the hot engine's running. Cold weather is best for this test.

I replaced the gasket with the latest elastomer type from DMGRS.

TC

25th January 2020, 10:42	#10
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	My 1.8T recently dumped the coolant into the sump. It wasn't overheated or stressed, it simply happened. Prior to that, I'd been topping it up with a cupful of coolant every couple of weeks. I knew something was wrong, but it happened before I'd a chance to work on it. The problem was the OEM elastomer head gasket. The 'rubber' seals around the oil channels had simply delaminated from the metal. The fire rings were perfect. With this sort of failure, you don't get pressurisation in the cooling system. It's very insidious because there are few outward signs. Mayo under the oil filler cap is one as is steam being emitted from the open oil filler neck when the hot engine's running. Cold weather is best for this test. I replaced the gasket with the latest elastomer type from DMGRS. TC Last edited by T-Cut; 25th January 2020 at 10:51.. Reason: Replaced with smaller image.