C . then fit the spring retainer

2»22 Engine, clutch and transmission

13.3b On L, N and R models, the bolt is on the back

illustration). Compress the spring with the valve spring compressor and install the collets (see illustration). When compressing the spring, depress it only as far as is absolutely necessary to slip the collets into place. Make certain that the collets are securely locked in the retaining groove.

28 Repeat the procedure for the remaining valves. Remember to keep the parts for each valve together and separate from the other valves so they can be reinstalled in the same location.

29 Support the cylinder head on blocks so the valves can't contact the workbench top, then very gently tap each of the v/alve stems with a soft-faced hammer. This will help seat the collets in their grooves.

ИИ1ЯРЯ Check for proper sealing of ШаЛШЯЛ _{tne vo}i_{ves 0}y pouring a

Hi 14 I small amount of solvent into

each of the valve ports. If the solvent leaks past any valve into the combustion chamber area the valve grinding operation on that valve should be repeated.

I

13 Camshaft drive gear assembly - removal, inspection and installation

13.3a On J and К models, the bolt (arrowed) is on the front

Note: To remove the camshaft drive gear, the engine must be removed from the frame.

12.27a A small dab of grease will help to

keep the collets in place on the valve while

the spring is released

Removal

1 Remove the engine (see Section 5).

2 Remove the cylinder head (see Sec­tion 10).

3 Unscrew the single bolt securing the camshaft drive gear assembly to the outside of the cylinder block - on J and К models the bolt is situated on the front of the block, while on L, N and R models it is on the back (see illustrations). Check the condition of the sealing washer and renew it if necessary.

4 Unscrew and remove the four bolts securing the assembly to the cylinder block (see illustration). Carefully lift the assembly out of the cylinder head, noting how it fits (see illustration). Remove the two dowels if they are loose (see illustration).

12.27b Compress the springs and install

the collets, making sure they locate in the

groove

Inspection

5 Wash the assembly in clean solvent and dry it off.

6 Check the teeth on both gears for cracks and other damage and make sure the gears turn smoothly and freely. If the teeth are damaged or worn, the assembly must be renewed. If this is the case, the corresponding teeth on both the camshafts and the crankshaft should be inspected.

Installation

7 If removed, fit the two dowels into the cylinder block, making sure they are fully pressed home (see illustration 13.4c).

8 Install the gear assembly, making sure it is fitted with the bolt hole for the cylinder block bolt facing in the corect direction for your model (see Step 3). Press the assembly squarely down onto its dowels, making sure the lower gear teeth mesh with those of the drive gear on the crankshaft (see illus­tration 13.4b). Due to the split sprung gear, the assembly will probably not sit flat onto the block as it cannot mesh fully with the drive gear on the crankshaft. Check that the gears have at least partially meshed either by turning the upper gear back and forth - the whole assembly should be felt to rise off the cylinder head slightly, or by tuning the crankshaft - the gears should turn accordingly.

9 Install the four mounting bolts (see illustration 13.4a) and tighten them all finger-tight at first, then tighten them evenly and a

13.4a Remove the four bolts (arrowed)...

13.4b... then lift the assembly out.

13.4c... and remove the dowels (arrowed) if loose (L, N and R models shown)

Engine, clutch and transmission 2*23

little at a time, making sure the assembly is being drawn squarely down onto the dowels as the gears mesh fully. Install and tighten the cylinder block bolt, using a new sealing washer if required (see illustrations 13.3a or b). 10 Install the cylinder head (see Section 10) and the engine (see Section 5).

Дата добавления: 2015-10-29