Camshaft. Rocker Arms. Hydraulic Lash Adjusters

GENERAL INFORMATION

Camshaft Timing Gear

47. CAMSHAFT SPROCKET

Remove or disconnect:

PROCEDURE.

1. Remove camshaft housing cover 6.

2. To hold the valves, supply compressed air to the engine cylinders through

adapters screwed into the spark plug holes.

3. Compress the valve springs.

32..

4. Rocker arms 36 and hydraulic lash adjusters 37. Mark them with sequence numbers

for reassembly in the same positions.

5. Camshaft sprocket.

47..

6. Ignition distributor.

14..

7. Remove camshaft thrust plate 11 and remove camshaft 51 from the rear bore of the housing.

8..

Inspection

PROCEDURE.

1. Sprocket.

2. Keyway and thread.

3. Bearing journals and cams for:

– wear.

– scoring.

– pitting.

– signs of overheating.

Warning.

A defective camshaft is not repairable and must be replaced.

When installing a new camshaft, all

valve lifters (except roller type) and bearing journals must be replaced. Measure camshaft runout and bearing journal diameter on a check stand. If the dimensions are outside the specified tolerances, replace the camshaft.

If a new camshaft is installed in the engine, it is necessary to

add an additive of type 1051396 EP or equivalent to the engine oil. Lubricate

the camshaft cams with grease type 1052367 or equivalent.

Installation

PROCEDURE.

1. Install seal 49 on the front camshaft journal. Use the installation

tool.

2. Camshaft

51. When installing the shaft, do not damage the seal.

3. Rear thrust plate 11.

11. Tighten the bolts to 8 N·m. Measure axial

camshaft clearance. Permissible axial clearance is 0.04–0.16 mm.

4. Ignition distributor.

14..

5. Camshaft sprocket 47, timing belt 44, front timing belt cover.

6. To hold the valves, supply compressed air to the engine cylinders through

adapters screwed into the spark plug holes.

7. Install rocker arms 36 and hydraulic lash adjusters 37 in their original positions.

8. Camshaft housing cover 6.