MINI Timing Chain Kit for all Gen 2 MINI Cooper S with N14 motors. If you start up your car in the morning and you hear a rattling at start up or when it's cold out, then you are having a problem. Once it starts to rattle, it can jump teeth and cause the car to run poorly. It can even get so bad as to be off several teeth, to the point you can not drive it without any check engine lights. We have seen the tensioners come lose from the block, the tensioners fail, the chain stretch (badly), as well as timing off!
This kit includes OEM chain guides (3), a tensioner, and chain, lower sprocket, bolts. We have found, here at the shop, that if you over heat your engine, follow dealer recommended oil services, or run it with out oil for too long, you can wear out or break the chain guides as well as stretch the chain, or cause the tensioner to fail . Chain stretch seams to be the most common due to heat and lack of lubrication. Once the chain has stretched, the tensioner cannot keep the correct tensioner on the chain allowing extra wear on the tensioner causing it to fail as well as the ability for the chain to skip teeth and affect performance, as well as in extreme cases, the engine actually crash into it self.
As an added benefit, we are now cryogenicly treating all chains and tensioners as well as all the bolts and sprockets in all of our timing chain kits. The cryogenic “heat treating” process is where the material is cooled to approximately −185°C (−301°F) with the use of liquid nitrogen. This increases the amount of martensite in the steel's crystal structure, increasing its strength and hardness. Which in turn will not allow the chain to stretch or the tensioner to fail as quickly if ever. This keeps your motor in time better as well as quitter.
Note: This does require special tools to keep the cams and engine in TDC. Recommended for expert mechanics.