Pic. 3.19. Camshaft and camshaft oil seal: 1 - PCV hose; 2 - clamps for fastening the accelerator cable; 3 - cylinder head cover; 4 - camshaft pulley; 5 - camshaft seal; 6 - axis of rocker arms assembled with rocker arms; 7 - camshaft
Removing
- Disconnect the wire from the negative battery terminal.
- Remove the air filter.
- Remove the ignition distributor.
- Remove the timing belt drive timing.
- Disconnect the PCV hose from the fitting on the cylinder head cover.
- Turn out bolts and remove clips of fastening of a cable of an accelerator.
- Turn out bolts and remove a cover of a head of cylinders.
- Using special tools MB990767 and MD998719 or MD998754, block the camshaft pulley from turning and remove the pulley mounting bolt (pic. 3.20). Remove the pulley from the camshaft.
- Punch a groove near the sealing lip with a knife or flathead screwdriver.
Pic. 3.20 Using special tools to block the camshaft pulley from turning
Warning. Be careful not to damage the camshaft and cylinder head.
- Insert a flat screwdriver blade wrapped in cloth into the punched groove, and, using a screwdriver as a lever, remove the oil seal.
- Loosen and then unscrew the intake rocker shaft bolt, then remove the entire assembly with the bolt that should remain with the assembly.
- Loosen and then remove the exhaust valve rocker shaft bolt, then remove the entire assembly with the bolt that should remain with the assembly.
Warning. Do not disassemble the rocker shaft assembly.
- Evenly and gradually unscrew the bolts securing the camshaft covers, remove the covers and the camshaft.
Installation
- Installation is carried out in the reverse order of removal, taking into account the following.
- Lubricate the camshaft cams and cams with engine oil.
- Install the camshaft to the cylinder head.
- Lubricate the lip of the camshaft oil seal with engine oil.
- Using a special tool, press in the camshaft oil seal (pic. 3.21).
Pic. 3.21. Using a special tool to press in the camshaft oil seal
- Install the camshaft pulley and secure with a bolt, tightening it to the required torque.
- Using special tools MB990767 and MD998719 or MD998713, block the camshaft pulley from turning and tighten the pulley mounting bolt to 88 Nm (see fig. 3.20).
- Check and, if necessary, adjust the valve clearances.
- Install and bolt the cylinder head cover.
- Install the timing belt drive of the gas distribution mechanism.
- Install the air filter.
- Connect the wire to the negative battery terminal.