XK-8 Coupe (X100) V8-4.0L (AJ27) (1999)
3. Remove the primary chain tensioner blade.
Remove the pivot bolt which secures the tensioner blade.
Remove the tensioner blade.
4. Push the tensioner piston (secondary chain) into the body to to release the tension on the left-hand secondary timing chain.
Insert a thin rigid wire through the hole in the end of the tensioner piston to displace the ball from the non-return valve seat.
With the wire in position, press the piston fully into the tensioner body.
Remove the wire.
5. Reposition the timing chain assembly forward along the camshaft bosses to enable the primary timing chain to clear the cylinder head casting.
6. Detach the left-hand primary timing chain, and allow it rest against the crankshaft sprocket.