The problem has to do with aluminum bolts in the variable camshaft timing adjustment unit, a setup that BMW calls VANOS. This part helps determine when the engine’s valves open and close. If the bolts ...
BMW's variable valve timing system entered the scene in 1992. VANOS evolved into Double VANOS in 1996 with the S50B32 engine of the E36-gen M3, double VANOS meaning continuously variable adjustment ...