5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
being new to owning 93 518 with the m40 engine, i was hoping someone could answer a question or two. it runs great, about 115k. it seems to have alot of tapping noise in the engine as if valve adjustment was off or it had a bad lifter. not being familiar with this engine, is the m40 just an inherantly noisy engine? does it have traditional rocker arms with eccentrics like the m20, or does it have a setup more similar to a m50 engine? last but not least, when you get up to around 4-4.5k rpm, it starts to run poor, sounds like its missing. perhaps an ignition issue. the previous owner mentioned something about the rev limiter acting up causing the issue. does it have a limiter and would it cause this particular issue. any help would be greatly appriciated. thanks.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.