0339817 JOHNSON SCREW, Crankcase to cylinder, upper, M10

Illustration 1 g01411978
(1) Maximum permissible temperature of the camshaft gear for installation on the camshaft ... 315 °C (599 °F)
Do not use a torch to heat the gear. A torch can unevenly heat the gear causing warpage. The hardness of the gear may also be changed with the use of a torch.
(A) Diameters of camshaft journals
Table 1
Number of Journal for 3064 Engine     Number of Journal for 3066 Engine     Standard Diameter     Service Limit (1)    
1, 2     1, 2, 3    
53.94 to 53.96 mm (2.123 to 2.124 inch)    
53.90 mm (2.122 inch)    
3     4    
52.94 to 52.96 mm (2.084 to 2.085 inch)    
52.90 mm (2.083 inch)    
( 1 ) The service limit is the maximum dimension or the service limit is the minimum dimension that is specified for a part. Replace the part if the service limit is reached. (2) Torque for two bolts ... 10 to 13 N m (90 to 115 lb in)
Illustration 2 g01411984
(B) Specified camshaft lobe lift Exhaust lobe ... 7.344 mm (0.2891 inch) Inlet lobe ... 6.689 mm (0.2633 inch) Service limit for lobe lift for exhaust ... 6.844 mm (0.2694 inch) Service limit for lobe lift for inlet ... 6.189 mm (0.2437 inch)Note: Replace the camshaft if the service limit for the lobe lift is reached.In order to find the lobe lift, use the following procedure:
Measure the camshaft lobe height (C) .
Measure the base circle (D) .
Subtract the base circle that is found in Step 2 from the lobe height that is found in Step 1. The difference is the actual camshaft lobe lift (B) .
Illustration 3 g01411985
Note: Use a dial indicator and blocks in order to determine the runout of the camshaft. Take one half of the dial indicator reading as the runout. (3) Camshaft Maximum permissible runout for camshaft ... 0.020 mm (0.0008 inch) Straighten the camshaft if runout is less than the following amount. ... 0.050 mm (0.0020 inch) Replace the camshaft if runout is more than the following amount. ... 0.050 mm (0.0020 inch)
Illustration 4 g01411986
(4) Measure the camshaft bearing with a dial indicator. Subtract the diameter of the camshaft journal in order to give bearing clearances. Refer to Table 3 for the clearance between the camshaft journals and the bushings.
Table 2
Number of Journal for 3064 Engine     Number of Journal for 3066 Engine     Standard Diameter     Repair Limit (2)    
1, 2     1, 2, 3    
0.04 to 0.09 mm (0.002 to 0.004 inch)    
0.15 mm (0.006 inch)    
3     4    
0.040 to 0.119 mm (0.0016 to 0.0047 inch)    
0.15 mm (0.006 inch)    
( 2 ) The repair limit is the maximum dimension or the repair limit is the minimum dimension that is specified for a part. Repair the part if the repair limit is reached.
Illustration 5 g01411988
(5) Install the dial indicator in order to determine gear end play. End play ... 0.10 to 0.25 mm (0.004 to 0.010 inch) Replace the thrust plate if the end play exceeds the following amount. ... 0.30 mm (0.012 inch) Thrust plate thickness ... 4.85 mm (0.191 inch)