Quote:
Originally Posted by steamship
Just looking at the photos again, isn't it a very unusual part to break? I always thought that it was just the plastic flaps that deteriorated over time, got brittle and broke off. Although, you could say he was 'lucky' in that there was no way part of the arm and the flap were going to drop into the cylinder, unlike small bits of plastic.
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Plastic going through the engine probably would not do any harm, if anything it would go through engine and get stuck in cat. It might just burn up in cat and not cause any issues or it may contaminate cat and make it less efficient.
On 4.0TDI I think the manifolds themselves are plastic, they age, wear and cracks over time and let the metal bits become loose which go in engine and wreck it.