BMW X5 E53 M62 V8 Timing Chain, Guides and VANOS

The most common cause is the plastic surface of the centre timing chain guide breaking up, so the chain rubs against the aluminium frame. Ticking can also come from a stuck lifter. Before drawing conclusions, find out whether the noise comes from the engine or from a belt-driven accessory.

Look for metal particles in the oil filter. Aluminium flakes usually indicate guide wear, and in that case fragments should also be looked for in the oil pan. The condition of the chain can be checked through the oil filler cap.

At a minimum new guides, chain, gaskets and tensioner. The oil pump strainer should be opened and cleaned. Locking the camshafts requires a timing tool set made for the M62; the crankshaft timing pin must not be used in its place. Without the tools the timing can end up wrong.

Yes. Driving with broken guides can destroy the whole engine, and an overhaul done in time saves further work. When buying a car, check whether the known weak timing chain assembly has already been done.