I’ve replaced the valve cover gaskets multiples times on my n62 with no issue. However, I read in the E39 5 series forums that this is a common occurrence on high mileage valve covers, the remedy being adding gasket sealer on top of the new gasket to stop leaks that would otherwise occur soon after the new gasket is replaced.
__________________
'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M.
|