AudiWorld Forums - Q7 2007 4.2 head gasket failure

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Q7 2007 4.2 head gasket failure

Just signed up . My first post to forum. Has any one ever had one fail or replaced them and if so can it be done in car or is it engine out. cheers

Quote:

Originally Posted by vaspc (Post 24588272)

Just signed up . My first post to forum. Has any one ever had one fail or replaced them and if so can it be done in car or is it engine out. cheers

ps its a 4.2 tdi

Hi, did you ever find out if you needed to take the engine out? What symptoms did you have to know it was a head gasket failure?
Thanks for reply

I had bought a 2007 with a misfire and losing coolant without leaks problem. Turned out to be intermediate cooling o-rings found in the back of the engine, spark plug gap, bad coil, and a broken coil connector. It had 125k miles. Never heard of a head gasket failing. The o-ring is replaced when the head gasket is replaced so it is a less-known fact. also removing the oil cap and looking for places in the head where it looks like oil won't touch or even if it looks like coolant in the oil this may be a good check. Doing a compression test is the easiest way to tell or not. Any standard shop can do a compression test if needed.