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My mk6 2.4 has got 200k on the clock. At 190k I rebuilt the engine with new bearings, timing gear etc etc. The local engine guy who looked at it remarked how good it was for that mileage (honing marks still on bores, perfect crank etc.
So back to a few weeks ago, for about a minute after a cold start there was a little smoke which disappeared as soon as the engine got a little heat into it. A thought maybe a sticky lifter or something, so took the rocker cover off to check, all good. On taking the injectors out I noticed they were well coked up. So I thought maybe a sticky piston ring. I decided to treat it to some expensive diesel or a bit of 2 stroke for a bit.
The other day when accelerating there was an almighty rattle, smoke and misfiring. Got home started stripping down the next day. I couldn't feel much compression on 1 and 2, and when turning over it was chuffing out of 1 and 2 inlets. Took the head off to find this. Something has got inside and bent the valves on 1 and 2 and seriously damaged the piston on 1. Head looks knackered so am gonna get a second hand one and replace number one piston. Con rods don't appear to be bent, the pots are all popping up the same amount above the head. Question is I don't want this to happen again so what could it have been? I suspected the turbo, there is side to side play in the shaft, should there be? My thoughts are the turbo was going with the start up smoke, but it all looks in one piece. Tia
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