Camshaft and camshaft oil seal for 4G13 engine (Mitsubishi Space Star)

Removal

Disconnect the cable from the negative battery terminal.
Remove the air filter.
Remove the ignition coils.
Disconnect the quarry ventilation hose from the branch pipe on the cylinder head cover (Fig. 3.47).

Fig. 3.47. Camshaft and camshaft oil seal of the 4G13 engine:1 - crankcase ventilation hose; 2 - PCV hose; 3 - accelerator cable mounting clamps; 4 - cylinder head cover; 5 - cylinder head cover gasket; 6 - spark plug guide tube; 7 - Front upper timing belt cover; 8 - camshaft pulley; 9 - camshaft oil seal; 10 - rocker arm axle assembly with rocker arms; 11 - camshaft position sensor connector; 12 - misfire detection sensor connector; 13-misfire detection sensor; 14 - base of the camshaft position sensor; 15 - camshaft; 16 - camshaft position sensor rotor

Disconnect the PCV hose from the fitting on the cylinder head cover.
Remove the bolts and clamps holding the accelerator cable.
Disconnect the connector from the camshaft position sensor and the misfire detection sensor.
Remove the bolts and cover and cylinder head gasket.
Remove the fresh spark plug guide tubes.
Remove the bolts and front upper timing belt cover.
Using the pulley mounting bolt, turn the crankshaft clockwise until the timing mark on the camshaft pulley aligns with the corresponding mark, while the piston of the 1st cylinder will be set to TDC in the compression stroke (Fig. 3.48).

Fig.3.48. Alignment of timing marks when setting the piston of the 1st cylinder to TDC in the compression stroke

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Use soft wire or strap clamps to secure the timing belt to the camshaft pulley, which will prevent the belt from shifting relative to the camshaft pulley (Fig. 3.49).

Fig. 3.49. Using two strap clamps to secure the timing belt to the camshaft pulley

Using special tools MD998719 or MD998754 and MB990767, block the camshaft pulley from turning and unscrew the pulley mounting bolt (see fig. 3.20). Remove the pulley with the toothed belt attached to it from the camshaft.

Warning: Do not turn the crankshaft after removing the pulley from the camshaft.

Using a knife or a flat-head screwdriver, make a groove near the working edge of the seal.

Warning: Be careful not to damage the camshaft and cylinder head.

Insert a flat-head screwdriver blade wrapped in cloth into the punched groove and, using the screwdriver as a lever, remove the seal.
Loosen and then remove the rocker arm shaft mounting bolt, then remove the entire assembly together with the bolt, which should remain with the assembly.

Warning. Do not disassemble the rocker shaft assembly.

Remove the bolts and camshaft position sensor base.
Remove the camshaft from the cylinder head.
Remove the bolt and camshaft position sensor rotor.

Installation

Installation is carried out in the reverse order of removal, taking into account the following.
Lubricate the camshaft journals and cams with engine oil.
Install and secure the camshaft position sensor rotor with the bolt.
Install the camshaft into the cylinder head.
Install and bolt the camshaft position sensor base.
Install and bolt the rocker arm axles.
Lubricate the working edge of the camshaft oil seal with engine oil.
Using a special tool, press in the camshaft oil seal (see fig. 3.21).
Install the camshaft pulley and secure it with the bolt, tightening it to the required torque. Using special tools MD998719 or MD998754 and MB990767, lock the camshaft pulley from turning and tighten the pulley mounting bolt to a torque of 88 N·m (see fig. 3.20).
Install and bolt the front upper timing belt cover.
Install the spark plug guide tubes.
Install and bolt the gasket and cylinder head cover.
Connect the connectors to the camshaft position sensor and the misfire detection sensor.
Install and secure the accelerator cable clamps with bolts.
Connect the PCV hose to the fitting on the cylinder head cover.
Connect the crankcase ventilation hose to the fitting on the cylinder head cover.
Install the ignition coils.
Install the air filter.
Connect the cable to the negative terminal of the battery.