Removal and Replacement

WM 153519 Removing and installing timing chain on 4.8-litre DFI engines

Preliminary work

1. Remove engine. -> 100119 Removing and installing V8 4.8-litre DFI engine - section on "Removing" 100119 Removing and installing V8 4.8-litre DFI engine
2. Remove timing-case cover. -> 153319 Removing and installing timing-case cover on 4.8-litre DFI engines - section on "Removing" Removal and Replacement

Information

Component overview





Timing chain and sprockets





Removing timing chain

Information

If the timing chain has to be removed or replaced, check the guide and tensioning rails as well as the chain pinions for wear and scoring and replace them if necessary.

Information

- The rolling direction of the timing chain must always be the same.

- If the timing chain is to be reused, the rolling direction of the timing chain must be marked before it is removed.

1. Loosen the fastening screws on the camshaft timing gears and camshaft controllers (by one or two turns). To do this, counter at the hexagon on the camshaft controller and camshaft timing gear using a ring wrench. => Camshaft timing gears and camshaft controllers





Camshaft timing gears and camshaft controllers

2. Remove timing chain from all sprockets by pulling it forwards.

Installing timing chain

Camshaft timing gears and camshaft controllers must be fitted and it must be possible to turn them (without tilting).

Information

If the timing chain has to be removed or replaced, check the guide and tensioning rails as well as the chain pinions for wear and scoring and replace them if necessary.

1. Check that the guide and tensioning rails are installed at the correct position.

Information

- The rolling direction of the timing chain must always be the same.

- If the timing chain is to be reused, the rolling direction of the timing chain must be marked before it is removed.

2. Place timing chain loosely on all sprockets. Ensure that the timing chain is positioned correctly on the guide rails.

Subsequent work

1. Install timing-case cover. -> 153319 Removing and installing timing-case cover on 4.8-litre DFI engines - section on "Installing" Removal and Replacement
2. Set the timing. -> 150516 Setting camshaft timing on 4.8-litre DFI engines Procedures
3. Install engine. -> 100119 Removing and installing V8 4.8-litre DFI engine - section on "Installing" 100119 Removing and installing V8 4.8-litre DFI engine