Filed Under (Rover) by admin on 05-06-2011
Symptoms of clutch drag, and/or notchy release operation, can occur within 500 miles of replacing the clutch, when the gearbox is replaced misaligned to the engine. This is due to the release bearing operating off-centre to the clutch cover diaphragm spring, causing excessive fretting between the two components. Premature wear to the fulcrum ring of the clutch cover, causing clutch drag, broken driven plate centre, and wear to the spigot bearing in the flywheel, can also result. A special dowel bolt, which is an interference fit, is fitted to the lower left hand position of the gearbox bell housing, (see diagram). This dowel bolt is frequently incorrectly replaced with a normal threaded bolt, for ease of fitment of the gearbox. Above the starter motor position is fitted a dowel pin, (see diagram). This is sometimes pushed forward when fitting the gearbox to the engine, and protrudes out of the front face of the engine adaptor plate, instead of being flush. In this position the dowel pin will not locate correctly with the gearbox bell housing. The dowels must be located before the remainder of the gearbox bell housing to engine adaptor plate bolts are fitted and tightened up. Should either or both dowels be missing, or not located correctly, misalignment of the gearbox will take place.