REMOVAL & INSTALLATION
5.0L, 5.8L and 7.5L Engines
See Figures 1, 2, 3, 4, 5 and 6
- Remove the front cover.
- Rotate the crankshaft COUNTERCLOCKWISE to take up the slack on the left side of the chain.
- Establish a reference point on the cylinder block and measure from this point to the chain.
- Rotate the crankshaft in the opposite direction to take up the slack on the right side of the chain.
- Force the left side of the chain out with your fingers and measure the distance between the reference point and the chain. The timing chain deflection is the difference between the two measurements. If the deflection exceeds 1 / 2 in. (13mm), replace the timing chain and sprockets.
- Turn the crankshaft until the timing marks on the sprockets are aligned vertically.
- Remove the camshaft sprocket retaining screw and remove the fuel pump eccentric and washers.
- Alternately slide both of the sprockets and timing chain off the crankshaft and camshaft until free of the engine.
- Position the timing chain on the sprockets so that the timing marks on the sprockets are aligned vertically. Alternately slide the sprockets and chain onto the crankshaft and camshaft sprockets.
- Install the fuel pump eccentric washers and attaching bolt on the camshaft sprocket. Tighten to 40-45 ft. lbs. (54-61 Nm).
- Install the front cover.
CHECKING TIMING CHAIN DEFLECTION
See Figure 7
To measure timing chain deflection, rotate the crankshaft CLOCKWISE to take up slack on the left side of chain. Choose a reference point and measure the distance from this point and the chain. Rotate the crankshaft in the opposite direction to take up slack on the right side of the chain. Force the left (slack) side of the chain out and measure the distance to the reference point chosen earlier. The difference between the two measurements is the deflection.
The timing chain should be replaced if the deflection measurement exceeds 1 / 2 in. (13mm).