Question about 2000 Audi A6
This is probably one of the worst things that can happen.
If it only jumped by a few teeth, then two of the pistons would have come up and found valves in the way. At this point, a couple of things normally happen. -
1 the engine siezes solid as there is nowhere for the valves to go.
2 The valves get bent, and the piston heads damaged.
3 The camshaft is stressed, and rockers can shear off as the valves are pushed back.
It usually results in damage to - Cylinder head, 2 cylinders (at least) - All damaged valves need replacing. Camshaft and rockers need crack-detecting, and/or replacing.
Most of the damage is restricted to the head, which needs taking off. It may be more cost effective at this point to replace the entire head from another scrapped vehicle than replacing parts individually - as you may miss small cracks, but this is a judgement call for cost vs time.
Hope this answers your question completely.
Posted on Jan 02, 2009
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Posted on Jan 02, 2017
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