Camshaft Oil Seal: Service and Repair
Camshaft oil seals, replacing
Replacing exhaust camshaft oil seal
Removing
^ Remove noise insulation in center and on right - hand side.
^ Remove ribbed belt and tensioning element.
^ Remove upper soothed belt guard go.
^ Set crankshaft to markings for TDC of No. 1 cylinder - arrows - by turning central bolt on crankshaft sprocket in direction of rotation.
^ Disconnect vacuum hose from activated charcoal filter and from throttle valve connection.
^ Unbolt coolant expansion tank and power assisted steering reservoir, but do not disconnect the hoses.
^ Screw M5x55 stud - 1 - into toothed belt tensioning element.
^ Screw hexagon nut - 2 - with a large washer- 3 - onto stud - 1 -.
^ Tension pressure piston of tensioning element just enough so that it can be secured with a suitable locking pin (e.g. from lifting appliance 2024 A).
Notes: If it is not possible to insert the locking pin, carefully tension the pressure piston of the tensioning element just enough to allow the toothed belt to be removed.
^ Take toothed belt off camshaft sprocket.
^ Loosen camshaft sprocket (counter - hold with 3036).
^ Pull off camshaft sprocket.
^ To guide oil seal extractor, screw securing bolt for camshaft sprocket - arrow - into camshaft as far as it will go (by hand).
^ Unscrew inner part of oil seal extractor 2085 two turns (approximately 3 mm) out of the outer part and lock in position with knurled screw.
^ Lubricate threaded head of oil seal extractor 2085, place it in position, and exerting firm pressure, screw it into oil seal as far as possible.
^ Loosen knurled screw and turn inner part of extractor against camshaft until oil seal has been extracted.
Installing
^ Lightly oil sealing lip of oil seal.
^ Fit guide sleeve 3241/2 onto camshaft journal.
^ Slide oil seal over guide sleeve.
^ Press oil seal in onto stop with press sleeve 3241/1. To do this use bolt 3241/5.
^ Install camshaft sprocket.
^ Check installation position.
^ The narrow web of the camshaft sprocket faces outward - arrows - and the marking for No. 1 cylinder TDC is visible.
^ Fit securing bolt for camshaft sprocket (use counter - hold tool 3036).
^ Align camshaft sprocket mark with marking on cylinder head cover.
^ Align vibration damper marking with marking on lower part of toothed belt guard.
Notes: If a piston is at TDC the valves strike the piston when turning the camshaft.. To avoid damage to valves and pistons the pistons must not be at TDC.
^ Fit toothed belt onto camshaft sprocket.
^ Pull out locking pin - arrow - and loosen piston of toothed belt tensioning element.
^ Unscrew stud - 1 -.
^ Turn crankshaft two complete turns in engine direction of rotation, set again to TDC and check adjustment.
^ Install upper toothed belt guard.
^ Installing ribbed belt and tensioning element.
Tightening torques
Replacing intake camshaft oil seal
Removing
^ Remove ribbed belt.
^ Disconnect connector from Hall sender - G40 - arrow -.
^ Remove toothed belt guard (upper section).
^ Remove Hall sender housing. - Remove Hall sender rotor and washer.
^ To guide oil seal extractor, screw bolt 2085/1 by hand into camshaft as far as it will go.
^ Unscrew inner part of oil seal extractor 2085 two turns (approximately 3 mm) out of the outer part and lock in position with knurled screw.
^ Lubricate threaded head of oil seal extractor 2085, place it in position and, exerting firm pressure, screw it into oil seal as far as possible.
^ Loosen knurled screw and turn inner part of extractor against camshaft until oil seal has been extracted.
Installing
^ Lightly oil sealing lip of oil seal.
^ Fit guide sleeve 3241/2 onto camshaft journal.
^ Slide oil seal over guide sleeve.
^ Press oil seal in onto stop with press sleeve 3241/1. To do this use bolt 3241/3.
^ Fit notch in Hall sender rotor into intake camshaft.
^ Fit washer (conical taper facing outward).
^ Install Hall sender housing.
^ Install toothed belt guard (upper section).
^ Plug in connector for Hall sender.
^ Install ribbed belt.
Tightening torques