Changing valve tappets
1. Clamp the side cover in a vice. R emove the
retaining ring and valve tappet.
2. Fit a new v alve tappet. Fit the retaining ring,
using a screwdriver.
Camshaft bearings
- There is very little wear on the camshaft and
camshaft bearings and these components rarely
need any work to be done on them.
- However, when reconditioning the engine,
check that the bearing surfaces and cams are
not abnormally worn.
- Fit new bearings so that the lubricating holes
are opposite the oilways in the block.
Checking camshaft setting
1. Set the crankshaft at T DC for No. 1 cylin-
der’ s compression stroke (valves closed).
2. Set up two dial gauges against the valve
spring thrust washers.
3. A djust the rocker arms so that there is no
clearance and then an additional 0.1 mm (see
that both valves are open 0.1 mm).
4. Zeroize both dial gauges.
5. T urn the cr ankshaft one revolution in its
direction of rotation until the T DC position is
reached again.
6. R ead the two dial gauges and compare the
results with the values given below:
Intake valve lifting height 0.55-1.65 mm
E xhaust valve lifting height 0.50-1.50 mm
To Next Page
Loading...