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      11-06-2023, 02:31 AM   #23
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Quote:
Originally Posted by TLK View Post
Reread my post above. This always happens to the BMW V8ís once youíve got enough miles on the valve seats. They cost less than a dollar a piece, but itís $6000 to tear down and replace them. Iíve done it on two so far. Iíll probably sell the M5 before I reach that point.

The oil burning will cause the car to fail smog, it will eventually kill the O2 sensors and the catalytic converter.
This is why SapphireM5 never took his M5 over 4500rpm.
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      11-07-2023, 04:48 PM   #24
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I donít really know. It starts out small and gets worse. Itís probably similar to other valve issues or even piston/bore issues. Probably donít know for sure until it is torn down. Most of the money goes to taking it out and putting it back, because the engine is crammed into the bay without much room and there a lot of connections to deal with and fluids to refill.
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      04-15-2024, 07:37 PM   #25
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Bumping this thread. I'm at 83k and like clockwork have put in 4 quarts of oil the last 2k miles. Went to dealership and was the valve seals... ugh.. I'm looking to keep the car so will likely move forward but not the news I wanted to hear. thanks for this post
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      04-15-2024, 07:48 PM   #26
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83k, right on schedule.
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