The N63 engine variants are considered some of the most problematic (if not THE most problematic) engines you can buy these days. Which engines in current cars are more problematic? I don't know of any which are as bad or worse.Correct, the warranty is this - on N63 it was 120k its now 131k for N63 engines for the valve seals. If its the valve seals leaking they will repair no charge if under 131k. Mine took 1 month however bmw said because my timing chain guides did not look good not to reinstall the engine they will send a new engine to install, I have 113k on mine ...
BMW n63 Valve Stem Seals Repair This BMW equipped with the N63 engine had an oil consumption issue where 1qt had to be added every 4 days and was blowing smoke from the tailpipe with a blue tint when accelerating post-warmup. This is caused by the aged rubber on the valve stem seals that hardens and cracks which will lose its ability to seal ...
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