How To Replace Ac Belt On BMW 650i
BMW A/C Belt replacement Procedure The ac belt on your car is a strech belt with no belt tensioner. There is a BMW special tool (64 1 040) to hold the belt to the compressor pulley so when the engine is turned with a ratchet, the belt will walk onto the pulley. They make a special tool to take this off and put it on. Pretty much when putting it on all you have to do is put the belt on the crank pulley and partially on the a/c compressor pulley. Then there is a special tool you clamp to the pulley on top of the belt. Then spin the crank pulley by hand and stretches it right on. Buy a Gates K040325 belt. Feed it over the big pulley (harmonic balancer). Have someone under the car push the belt over the pulley as someone up top has a socket on the harmonic balancer pulley. Pull the harmonic balancer with socket to turn the engine and the belt will walk right on. This belt is just a little bigger and will not spread like the factory belt. All the BMW mechanics hate this job. Follow t...