...ure from lAc k of oil Common turbo failure modes create much discussion between Melett's technical department and their customers. To help identify common failures in warranty situations, and to provide advice on how to prevent future failures occurring, Melett have created a series of h...
...p. As replAc ing the belt also requires the auxiliary drive system to be removed, Dayco recommend that all the systems' components - timing drive and auxiliary drive - be replAc ed at the same time. Dayco has produced the following guidelines to help technicians follow the correct installati...
...oller contAc t This defect will also cause misalignment and abrasion of the belt. Incorrect tension of GT357.31 Misalignment of the hole in the shaft of the tensioner and the body of the tensioner indicate a problem with the tension. ContAc t mark Incorrect positioning of guid...
...ding sur fAc e areaImpAc t marks • Piston protrusion too great • E xcessive remAc hining of the cylinder head sealing sur fAc e • Incorrect valve recess • Incorrect cylinder head gasket • Carbon deposits on the piston crown • Insufficient valve clearance • Incorrect valve timing...
...operation Ac ross a wide range of vehicle types. Two common types we get calls about are the Reversible Alternator systems, fitted to French vehicles, and the more familiar starter motor system fitted with an up-rated starter motor. These systems...
...re is charAc teristic of a misaligned tensioner roller; the misalignment causes the timing belt to rub against the plastic engine covers. When tightening the M8 bolt (torque = 25 Nm ±2 Nm), the tensioner roller GT359.32 becomes incorrectly positioned on the guide, under the load...
...s power reAc hing the spark plug means vehicles struggle and expend more fuel to compensate for insufficient power. Vehicle BAc kfiring A bAc kfiring vehicle can be an early symptom of an ignition coil failure. The cause of this is unused fuel , emitted through the exhaust system. If...
...is charAc teristic of a misaligned tensioner roller; the misalignment causes the timing belt to rub against the plastic engine covers. When tightening the M8 bolt (torque = 25 Nm ±2 Nm), the tensioner roller GT359.32 becomes incorrectly positioned on the guide, under t...
...t that reAc hes the combustion chamber settles in the ring grooves where it causes abrasive wear in the ring grooves and at the piston ring flanks. This results in excessive ring height clearance and consequently to a deterioration of the guidance of the piston rings in the ring grooves. T...
...or in extrAc ts without the prior written consent of Schaeffler Automotive Aftermarket GmbH & Co. KG is prohibited.Copyright ©Schaeffler Automotive Aftermarket GmbH & Co. KG September 20123ContentsPage1 History 42 Valve train 52.1 Requirements 52.2 Designs 62.3 Valve lash...