Oil pressure switch (page 3 of 3)

18. If camshaft timing belt is to be re-used, mark position of tensioner backplate to cylinder head for belt tensioning reference. Mark direction of rotation of belt using chalk.₁
19. Loosen tensioner pulley Allen bolt₁/₂ turn.
20. Loosen tensioner backplate screw /₂ turn.
21. Push tensioner pulley down to fully OFF position.
22. Tighten backplate bolt to 10 Nm.
23. Ease timing belt from gears and remove.

CAUTION: Ease timing belt off gears using fingers only. Metal levers may damage the belt and gears.

24. Loosen tensioner backplate bolt and ensure tensioner moves freely through its adjustment range and returns under spring tension.
25. Push tensioner down to OFF position and tighten backplate bolt to 10 Nm.

Refit

1. Clean timing gears and pulleys.

CAUTION: If the sintered gears have been subjected to prolonged oil contamination, they must be soaked in a solvent bath and then thoroughly washed in clean solvent before refitting. Because of the porous construction of sintered material, oil impregnated in the gear will emerge and contaminate a new belt.

2. Check correct alignment of timing marks for 90° BTDC.

NOTE: Ensure dots on crankshaft gear are aligned with flange on oil pump and camshaft gear aligns with mark on rear cover.

3. Fit timing belt over crankshaft gear and then over camshaft gear, keeping belt taut from crankshaft to camshaft gears.

CAUTION: Existing timing belts - ensure direction of rotation mark is facing correct way.

4. Using fingers only, ease timing belt over tensioner pulley and coolant pump drive gear, ensuring belt is positioned centrally around gears and pulley.
5. Fit timing belt lower cover, ensuring correct position of seal.
6. Fit bolts securing lower cover and tighten to 10 Nm.