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|3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.|
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| Originally posted by Mach 5@Dec 22 2004, 12:51 PM |
It is possible to bend an exahust valve. This is commonly done by misshifting and over-reving the motor. e.g.: shifting into 2nd instead of 4th. While not a common thing it has happened before.
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| Originally posted by peterkulesza@Dec 22 2004, 02:43 PM |
not necessarily, it may be too short of a poeriod to bend them all.
to test whether this is a valve at all (as opposed to stuck ring):
run compressionn test.
pour a little oil into the cylinder (a little means about 2-3 ml at most).
re-run compression test.
if it normalizes it is rings. if it does not it is valve.
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