Installation

6. Insert the camshaft set tool (Refer to '303-713 (Camshaft Set)', page 20-1-5).

With the crankshaft Key in the vertical position the camshaft flats will accept the camshaft set tool.

7. Remove the RH or LH timing chain tensioner, tensioner arm and timing chain guides.
   Do not remove the timing chain.
8. Compress the timing chain tensioner and insert the locking pin (Refer to '303-1072 (Timing Chain Tensioner Pins)', page 20-1-6). Remove bolts (x2) that secure the timing chain tensioner and withdraw.
9. Remove the floating tensioner arm.
10. Remove the fixed timing chain guide (bolts x2).
    Repeat for the second timing chain tensioner and timing chain guides.
11. Remove both timing chains and the crankshaft twin sprocket from the crankshaft.

Installation

Caution
The crankshaft key must remain in the vertical position until the camshaft chains are correctly installed and tensioned. Movement of the crankshaft before completion of valve timing may cause contact between a piston and a valve, resulting in valve and / or piston damage.

1. Ensure the crankshaft key is vertical and all camshafts are in the initial positions shown.

The crankshaft key is exactly in line with No.1 crankshaft throw. With the crankshaft key vertical, No.1 piston is 30° ATDC and all pistons are below engine block surface.

LH Cylinder Head (Cylinders 7-12)

1. Engage the camshaft timing service tool (Refer to '303-713 (Camshaft Set)', page 20-1-5) to flats on the camshafts.
2. Install the fixed timing chain guide.

4. Install the timing chain with the marked links (x3) matching the marks on the crankshaft and camshaft sprockets.
5. Install and tension the timing chain arm and tensioner. Withdraw the timing chain tensioner lock pin.
6. Ensure that all three marked timing chain links align with the timing marks on the camshaft and crankshaft sprockets.