Page 50
To adjust
1. Remove rocker cover.
2. Remove spark plugs.
3. Turn engine in normal running direction in order to open
and close the valves and check in the following order:
No. 1 valve with No. 8 valve fully open.
No. 2 valve with No. 7 valve fully open.
No. 3 valve with No. 6 valve fully open.
No. 4 valve with No. 5 valve fully open.
No. 5 valve with No. 4 valve fully open.
No. 6 valve with No. 3 valve fully open.
No. 7 valve with No. 2 valve fully open.
No. 8 valve with No. 1 valve fully open.
When adjustment is made the valve must be in the fully closed
position (figure 29).
4. Refit spark plugs and reconnect HT leads in the correct
order.
5. Refit rocker cover, renewing gasket if necessary.
Alternatively the tappets can be adjusted using a proprietary tool
similar to No. 6500A (see figure 30).
Stud removal
Damaged studs can be removed using extractor tool part No. 450A, in
conjunction with the tappet adjuster wrench No. 6500A as shown in
Figure 31
Engine specification
Cylinder head
Material Aluminium alloy
Joint gasket thickness 1.02 mm (0.040 in)
Cylinder Block
Material Forged aluminium alloy
Crankshaft
Material Forged high tensile steel
Main bearing journals 50.787 to 50.8 mm (1.995 to 2.0 inches)
Crankpin journals 33.07 to 33.08 mm (1.312 to 1.3025 inches)
End float 0.0764 mm (0.003 in) minimum
0.279 mm (0.011 in) maximum
Crankshaft regrinding size
1st undersize 0.254 mm (0.010 in)
Main bearing journals 50.533-50.546 mm (1.988-1.989 in)
Crankpin journals 33.07-33.08 mm (1.302-1.3025 in)
2nd undersize 0.508 mm (0.020 in)
Main bearing journals 50.279-50.292 mm (1.978-1.979 in)
Crankpin journals 32.81-32.82 mm (1.292-1.2925 in)
3rd undersize 1.016 mm (0.040 in)
Main bearing journals 49.771-49.784 mm (1.959-1.960 in)
Crankpin journals 32.31-32.32 mm (1.272-1.2725 in)
Crankshaft thrust washer sets
Oversize sets available 0.0635 mm (0.0025 in)
0.1270 mm (0.0050 in)
0.1905 mm (0.0075 in)
0.254 mm (0.010 in)
Pistons
Material Low expansion aluminium alloy
Size 62.53 mm (2.462 in)
All lands 62.17-62.26 mm (2.448-2.451 in)
At skirt 62.47-62.5 mm (2.459-2.638 in)
Piston rings
Gap 0.17-0.30 mm (0.007-0.012 in)
Width (compression rings) 1.245-1.250 mm (0.49-0.50 in)
Groove clearance 0.038-0.089 mm (0.0015-0.0035 in)
Width (oil scraper ring) 3.150-3.175 mm (0.124-0.125 in)
Groove clearance 0.038-0.089 mm (0.0015-0.0035 in)
To Next Page
Loading...
