Checking the drive chain after removal
Check for cracks and excessive wear on the drive chain link plates and rollers. If necessary, replace the drive chain with a new one.
A. Cracks.
B. Wear.
Checks after installation
Leak test
1. Before starting the engine, check the levels of oil and engine fluids. If the level is below the required level, top up.
2. Using the procedure below, check for fuel leaks:
Turn the ignition switch to position "ON" (but do not start the engine). After pressurizing the fuel lines, check for leaks in the connections.
Start the engine. Increasing the engine speed, again check for leaks in the connections.
3. Let the engine run to check for abnormal noises and vibrations.
Note. If the hydraulic pressure inside the chain tensioner drops after removal/installation, slack in the tensioner shoe may cause a rattling noise during and immediately after starting the engine. However, this does not indicate a malfunction. The noise will stop after the pressure is built up.
4. Warm up the engine thoroughly to ensure there are no fuel or engine fluid leaks (including engine oil and coolant).
5. Remove air by pumping from pipelines and hoses of hydraulic systems that have been disconnected (e.g. engine cooling systems).
6. After the engine has cooled down, check the engine oil/fluid levels again. If necessary, top up to the correct level.