Valve timing — check and adjustment (Range Rover 3)

Before disconnecting the battery, make sure that all the precautions prescribed for this procedure have been taken.

GENERAL INFORMATION, Precautions when working with electrical equipment.

Examination

1. Disconnect "negative" battery wire.

2. Remove the viscous fan.

COOLING SYSTEM: Td6, REPAIR WORK, Viscous fan clutch.

3. Remove the valve cover with gasket.

ENGINE TD6, REPAIR WORK, Valve cover gasket.

4. Turn out a cap of an opening of a clamp T.M.T. crankshaft.

5. Using the LRT-12-212 tool installed on the crankshaft pulley, turn the crankshaft in the direction of normal rotation until the piston of the first cylinder is in the T.M.T. compression stroke.

6. To fix the crankshaft in the T.M.T. cylinder 1, install tool LRT-12-108.

CAUTION: Do not rotate the engine against the normal direction of rotation.

7. Install tool LRT-12-173 on the intake camshaft.

8. If the intake camshaft is in the correct position, then the bearing surfaces of the tool LRT-12-173 will touch the plane of the valve cover connector on both sides.

9. Remove tool LRT-12-173 from the intake camshaft and install it on the exhaust camshaft.

10. If the exhaust camshaft is in the correct position, then the bearing surfaces of the tool LRT-12-173 will touch the plane of the valve cover connector on both sides.

To make an adjustment

1. Loosen the clamp and remove the hose from the vacuum pump.

2. Remove and discard the two vacuum pump mounting bolts.

3. Remove the vacuum pump and discard the O-ring.

4. After fixing the crankshaft with LRT-12-108 and holding the camshafts by the hexagons with an open-end wrench, unscrew and dispose of the bolts securing the chain drive sprockets.

5. Using new bolts, tighten the sprockets so that they rotate freely without end-play.

6. Install tool LRT-12-174 on the cylinder head.

7. Using LRT-12-173, set the intake camshaft to the correct position and tighten the LRT-12-174 mounting bolt.

8. Holding the exhaust camshaft with a hexagon wrench and using a torque wrench, tighten the exhaust camshaft sprocket bolt to 20 Nm and tighten it another 35°.

9. Loosen the LRT-12-174 mounting bolt and remove the LRT-12-173 from the intake camshaft.

10. Using LRT-12-173, position the exhaust camshaft in the correct position and tighten the LRT-12-174 mounting bolt.

11. Holding the intake camshaft with a hexagon wrench and using a torque sector, tighten the intake camshaft sprocket bolt to 20 Nm and tighten it another 35°.

12. Remove tools LRT-12-174 and LRT-12-173.

13. Remove tool LRT-12-108 to free crankshaft.

14. Using the LRT-12-212 tool installed on the crankshaft pulley, rotate the crankshaft two turns in the direction of normal rotation until the piston of the first cylinder is in the T.M.T. compression stroke.

15. To fix the crankshaft in the T.M.T. cylinder 1, install tool LRT-12-108.

CAUTION: Do not rotate the engine against the normal direction of rotation.

16. Install tool LRT-12-173 on intake camshaft.

17. If the intake camshaft is in the correct position, then the bearing surfaces of the tool LRT-12-173 will touch the plane of the valve cover connector on both sides.

18. Remove tool LRT-12-173 from the intake camshaft and install it on the exhaust camshaft.

19. If the exhaust camshaft is in the correct position, then the bearing surfaces of the tool LRT-12-173 will touch the plane of the valve cover connector on both sides.

20. If necessary, the valve timing adjustment should be repeated.

21. Remove tools LRT-12-173 and LRT-12-108.

22. Screw the plug of the hole of the T.M.T. crankshaft.

23. Clean the mating surfaces on the vacuum pump and on the cylinder head.

24. Install a new O-ring on the vacuum pump.

25. Align the vacuum pump driver with the camshaft, install the vacuum pump and, using new bolts, secure it by tightening the bolts to 22 Nm.

26. Put the hose on the vacuum pump and tighten the clamp.

27. Install the valve cover with gasket.