BMW Timing Chain Slide Rail - BBR 11317592850

Guide rails help guide the timing chain. Over the years and countless of hours of operation; these guide rails can wear down which can create extra noise. Unlike timing belts, timing chains are semi permanent parts of your engine, meaning their expected lifespans are well into hundreds of thousands of miles.

Timing Chain Guides are designed to align the chain so it can pass smoothly over the timing chain gears. Replacement of these items are typically restricted to rebuilding high mileage engines or when parts are missing.