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BMW N63 Valve Stem Seals Repair

BMW N63 Valve Stem Seals Repair

THE PROBLEM 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 the valve guide. Bad valve stem seals will cause excessive oil consumption and can be identified by recording the level of oil loss. This is unfortunately a common problem that has carried over from the N62 to the N63 BMW engine. The models affected are vehicles from 2003-2008 with N62 V8 engines such as the  E60 545i, E63 645i, E65 745i, E53 X5 and vehicles from 2009-2013 equipped with N63 engines such as F10 550i, F12 650i, F01 750i, and E70 X5. HOW WE FIXED IT We fixed it the only way you can fix this problem when it arises: by replacing the valve stems with new ones. First and f ... read more


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