Mechanics

TIMING CHAIN REPLACEMENT

2000 Jaguar XJ8

Engine Mechanical problem
2000 Jaguar XJ8 V8 Two Wheel Drive Automatic

I am in the process of replacing the timing chain for a 2001 jaguar xj8 (3.2 lt).I am having difficulty in locating the timing marks. Even the camshaft sprockets don't have keyways to hold them in place on the camshafts. Can someone out there help me with this problem as there are no jaguar dealers in the remote islands of Fiji.

Help needed urgently.

Steven
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Sitivenikhan
November 23, 2008.




PRIMARY TIMING CHAINS (NON-SUPERCHARGED)
NOTE: The 4.0L V8 has no engine timing alignment marks on the crankshaft or camshafts. Engine timing is achieved by installing the Crankshaft Setting Peg (303-531) and Camshaft Locking Tool (303-530). With the crankshaft setting peg in position, ensure the timing flat on each camshaft is in the uppermost position before installing camshaft locking tool. Variable camshaft timing unit may also be referred to as Variable Valve Timing (VVT) unit.

NOTE: Special Tools Required: Crankshaft Setting Peg (303-531), Camshaft Locking Tool (303-530), Chain Tensioning Tool (303-532), Primary Chain Wedge (303-533) and Variable Camshaft Timing Oil Control Unit Setting Tool (303-654). See Fig. 232-Fig. 236.

NOTE: " A" bank refers to the right/passenger side of the vehicle and " B" bank refers to left/driver side of the vehicle.

NOTE: Each door glass automatically drops 12 mm when the door is opened or when the convertible top is raised or lowered. It is important that windows are lowered before battery is disconnected to allow doors to shut properly.

Removal (" A" Bank)
Tips Click a link to view tip
Tech1Tip: special tool

Remove timing cover. See TIMING CHAIN COVER (NON-SUPERCHARGED).
Remove the variable camshaft timing oil control solenoid. See Fig. 141.
Remove the variable camshaft timing oil control unit housing retaining bolts and remove the variable camshaft timing oil control unit housing. See Fig. 142. Remove and discard the variable camshaft timing oil control unit housing " O" rings.
Raise and support vehicle. Remove the bolt which secures the Crankshaft Position (CKP) sensor to the flywheel housing. Remove the CKP sensor and allow it to hang free under the engine. Remove the torque converter bolts access grommet from the flywheel housing. See Fig. 143.
Install the crankshaft damper bolt (old one) to the crankshaft, hand-tight only. Rotate crankshaft until the triangular arrow indent on the flywheel is visible through the access hole. See Fig. 144. Confirm that the timing flat on each camshaft is uppermost position.
Position the crankshaft so that the Crankshaft Setting Peg (303-531) engages fully into the timing slot. Install and tighten the bolt to secure the crankshaft setting peg. See Fig. 145. Remove the crankshaft damper bolt from the crankshaft and lower the vehicle.
Install the Camshaft Locking Tool (303-530) to the " A" bank camshafts, aligning the shafts slightly as necessary. Loosen the bolt that secures the exhaust camshaft sprocket and the bolt that secures the variable camshaft timing oil control unit. See Fig. 146. Remove camshaft locking tool.
Remove the primary chain tensioner bolts, primary chain tensioner and tensioner backing plate. See Fig. 147.
Remove the primary timing chain tensioner pivot bolt and remove the primary timing chain tensioner blade. See Fig. 148.
Remove the bolt which secures the primary timing chain guide. Noting the position of the primary timing chain guide, remove the primary timing chain guide from the upper retaining pin. See Fig. 149.
Remove the primary timing chain from the variable camshaft timing oil control unit and from the crankshaft sprocket. Clean and inspect all components.
Installation
If " B" bank timing chain was removed, see INSTALLATION. If not, go to next step.
If previously removed, install the timing chain sprocket to the crankshaft. The teeth of the " A" bank and the " B" bank timing chain sprockets on the crankshaft must be out of phase with each other. If they are in phase after installing, remove the sprocket, turn it on its vertical axis and reinstall sprocket. See Fig. 150.
Install the chain tensioning tool to the exhaust camshaft sprocket. Reposition the sprocket (and the variable camshaft timing oil control unit) for the most advantageous position for use of the tool. See Fig. 151. Remove the tool.
Install the primary timing chain into position over the crankshaft sprocket and the variable camshaft timing oil control unit. There must be no slack on the drive side of the primary timing chain and the sprockets must not be rotated on the camshafts, or the tensioning tool may not fit. See Fig. 152.
Install the primary timing chain tensioner blade to the cylinder block. See Fig. 148. Install the pivot bolt and tighten specification. See TORQUE SPECIFICATIONS.
Push the primary timing chain tensioner piston into the tensioner body to provide clearance for installing the primary 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. See Fig. 153. With the wire in position, press the piston fully into the tensioner body. Remove the wire.
Install the 2 primary timing chain tensioner bolts to the primary timing chain tensioner and locate the tensioner backing-plate on to the 2 bolts. Align and install the primary timing chain tensioner to the cylinder block and to the mating slot on the rear face of the primary timing chain tensioner blade. See Fig. 147. Tighten the primary timing chain tensioner bolts to specification. See TORQUE SPECIFICATIONS.
Use a Primary Chain Wedge (303-533), or 2 if needed, between the primary timing chain tensioner and primary timing chain tensioner blade, to take up the slack in the chain for tightening of the variable camshaft timing control unit and exhaust camshaft sprocket. See Fig. 154.
Using the chain tensioning tool, apply force to the tool in an counterclockwise direction to tension the chain on its drive side. See Fig. 151. While applying opposing force to the sprocket and chain, tighten the exhaust camshaft sprocket bolt to specification. See TORQUE SPECIFICATIONS.
Using the Variable Camshaft Timing Oil Control Unit Setting Tool (303-654), rotate the variable camshaft timing oil control unit fully counterclockwise to the fully retarded position. See Fig. 155.
Check that the primary chain wedges are still in place. While applying opposing force to the sprocket and chain using the chain tensioning tool, tighten the variable camshaft timing oil control unit bolt to specification. See TORQUE SPECIFICATIONS. Remove the chain tensioning tool and the primary chain wedges and camshaft locking tool.
Raise and support vehicle. Remove crankshaft setting peg. Install the CKP sensor and bolt to the flywheel housing. See Fig. 143. Tighten the CKP sensor bolt to specification. See TORQUE SPECIFICATIONS. Install the access grommet to the housing and lower the vehicle.
WARNING: Check that the ring dowels are engaged squarely. Fully locate the assembly as much as possible by hand. Failure to follow this procedure may result in damage to the vehicle.

Install NEW " O" rings to the variable camshaft timing oil control unit housing. Lubricate the " O" rings and the bushing. Install the variable camshaft timing oil control unit housing. See Fig. 142. Install the variable camshaft timing oil control unit housing bolts. Tighten to specification. See TORQUE SPECIFICATIONS.
Install the variable camshaft timing oil control solenoid. See Fig. 141. Install and tighten the variable camshaft timing oil control solenoid bolt to specification. See TORQUE SPECIFICATIONS.
Install the timing chain cover. See TIMING CHAIN COVER (NON-SUPERCHARGED).

Dave H
Dec 31, 2009.


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