Contents: Removal ⤓ Examination ⤓
To install and remove the timing belt of 8- and 12-valve petrol engines, depending on the model and year of manufacture, it is necessary to additionally remove nearby units: generator, compressor servo pump, air conditioning compressor.
Removal
Mark the direction of rotation of the toothed belt.
Unscrew the upper engine mount while supporting the engine.
Loosen the water pump pulley by lightly pressing the V-belt with your hand so that the pulley does not turn.
Remove the V-belt.
Set the crankshaft to TDC of cylinder 1. How to set the engine to TDC of cylinder 1?
Remove the upper timing belt cover.
Turn the engine crankshaft clockwise until the camshaft reaches the TDC position.
Turn the engine over. Align the mark on the camshaft gear with the TDC mark on the cylinder head. The engine is set to the TDC position of the first cylinder ignition.
Disconnect the crankshaft belt pulley from the crankshaft.
Remove the lower timing belt cover.
Mark the direction of movement of the toothed belt which moves clockwise.
Loosen the timing belt tensioner installation bolt.
Loosen the timing belt tension and tighten the mounting bolt so that the belt tensioner setting does not shift.
Remove the timing belt.
Examination
Visually inspect the condition of the timing belt. If any of the following defects are found, replace the belt.
The teeth are broken or cracked at the base
Possible causes of defects:
- camshaft and distributor seizure;
- the crankshaft and/or camshaft seals are damaged.
The back side of the belt is badly worn or has cracks
Possible causes of defects:
- tension roller jamming;
- engine overheating;
- the belt is catching on the cover.
The side surface of the belt is worn. The edges of the belt are rounded, the cord threads are frayed and protrude outward
Possible causes of defects:
- incorrect belt installation;
- the side surfaces of the tension roller are nicked or heavily worn.
Wear of teeth. The outer coating on the thrust surface of the teeth is worn off, the rubber layer underneath is worn and has a whitish color
Possible causes of defects:
- poor belt cover seal;
- coolant pump leak;
- camshaft malfunction;
- distributor malfunction;
- excessive belt tension.
Oil, coolant or water getting on the belt
Possible causes of defects:
- poor sealing in the oil seals;
- coolant pump leak;
- poor sealing of the belt cover.
Check the TDC position of the camshaft (1) and crankshaft (2) of the engine.
Check if the camshaft is in the TDC position of the 1st cylinder. The marking on the camshaft gear should match the mark on the cylinder head. The crankshaft should not be in the TDC position.
Put the timing belt on the crankshaft gear, keep the tension side of the timing belt taut, then lay the timing belt on the camshaft gear through the tensioner. The used timing belt should be installed in the original direction of movement.
Turn the camshaft gear counterclockwise a little. Unscrew the tensioner clamp bolt. Install the crankshaft belt pulley so that the toothed belt does not slip off when the crankshaft rotates.
Tighten the timing belt.
Check the TDC position of the crankshaft and camshaft of the engine. All TDC marks and markings with the timing belt tensioned must match.
Install the lower timing belt cover.
Tighten the crankshaft pulley with the central bolt to a tightening torque of 100 Nm. To do this:
The original was published on the website: mitsubishiman.ru
- put in 1st gear;
- press the brake pedal;
- tighten the 4 mounting bolts to 15 Nm.
Tighten the water pump belt pulley to 10 Nm.
Install the V-belt.
Secure the upper engine mount.
Check that the ignition timing is set correctly.