Crank Seal Serpentine Belt Guard Acceory Part For BMW 528i 335i 135i M2 S55 N54 N55 N52 7075 Aviation Aluminum AlloyDescriptionReport Item / Sucious ActivityThe all-new URLWALL Crank Seauard is an inexpensive insurance policy to protect your very expensive BMW N55 and even S55 from potential catastrophic engine fai!Features:Brand:URLWALLMaterial:7075 billet aluminumCompatible models:For BMW F series N55 and S55 engines.Production proce: aluminum bloone piece rather than weldingPackage included:A Crank Seauard,two Screws and spacersOn the N55 and S55, the acceory belt sits under some common leak areas in your car's oil and coolant system. If you experience one of these leaks, what can happen is your acceory belt can start to walk off your crank pulley. Because of the design of the engine, tiny shards of rubber from your fraying belt can easily find their way through your crank seal. If this happens, these little pieces of the belt can get picked up by your timing chain and find their way into your valve cover and cause damage, and/or they can lodge thelves into your oil pickup, starving your engine of oil. Additionally, we've even seen cases where the belts snap, wrap thelves around your crank pulley and force the entire belt into the engine, through the crank seal! If either of these situations is to occur, you'll be certainly looking at a costly new engine, which will cost thousands of s.The URLWALL Crank Seauard is a precisely engineered piece of art, which acts to blobelts and belt particles from ing their way through the crank seal, by reducing the gap between the URLWALL Crank Seauard and the crank hub to just twenty thousandths of an inch, saving your engine! The URLWALL Crank Seauard also features s-centering technology, to ensure a perfect fit every single time.