I have a problem with the crankshaft pully on my h22a4 and have been told by a couple mechanics that I will need 2 either replace my entire crank or to replace my motor (since it is around the same price). I need 2 know if anyone else has experienced this same problem and what would u suggest I do? (the car starts and runs great but after around 20 mins my crankshaft pully begins 2 loosen and causes the belt 2 come off.)