F 250 4WD Pickup L6-300 4.9L (1982)
Camshaft Gear/Sprocket: Service and Repair
6-300
When the crankshaft and camshaft lose their timing relationship through removal of timing gears, interference may occur between
crankshaft and cam lobes. Therefore, to prevent possible damage to camshaft lobes, do not rotate crankshaft or camshaft without timing gears
installed.
Fig. 30 Valve timing. 6-300
Camshaft Gear
1.
With front cover removed, crank engine until timing gear marks are aligned as shown in Fig. 30.
2.
Install gear puller and remove gear.
3.
Ensure key and spacer are properly installed. Align keyway with key and install gear on camshaft.
4.
Check backlash between crank and cam gear, using a dial indicator. Hold gear firmly against block while making check. Backlash should be
between .002 inch and .004 inch.
Crankshaft Gear
1.
Remove timing gear case cover as previously described.
2.
Remove gear using a suitable puller.
3.
Remove key from crankshaft.
4.
Reverse procedure to install. Ensure timing marks are aligned, Fig. 30.
