Regular Checks (Every Drive):

• Coolant and Oil Level: Manually check after each drive.

• Regular Driving: Helps maintain engine health and prevents component wear.

• Ensure Fresh Fuel: Use the highest octane to prevent detonation due to deterioration. 

Annually:

• Hydraulic Lifter Check: Use a stethoscope to listen for ticking at idle.

• Head Gasket Inspection: Spray carburetor cleaner at the intake bases; replace gaskets if idle changes.

• Fuel, Oil, and Coolant Lines: Inspect for chafing, mechanical rubbing, collapsing, or degrading under heat.

• Fuel Pump Filter: Change annually.

• Oil Sump Filter: Replace every 1-2 years.

• Oil Changes and Oil Leak Inspection: Change 5W40 oil and filter annually. The workshop manual incorrectly specifies a tightening torque of 75nm for the drain plugs, which can damage the sump/gearbox threads. Tighten the drain plugs by hand and then add a ¼ turn.

• Oil Pump Gear: Inspect for bevel gear damage and check rubber O-rings.

• Oil Fittings: Replace if cracked due to vibration.

• Cooling System Leak Inspection: Check for leaks, thermostat failure, and radiator clogging.

• Oil Pump Chain Tensioner: Ensure it does not walk laterally on the mount.

• Tensioner Bushings: Inspect and replace if hardened.

• Intake Manifold Butterfly Screw Inspection: Check and secure screws.

• Crank Seal and Oil Sump Seal Inspection: Inspect and replace with OEM parts if leaking.

• Transmission Heat Exchanger: Check for corrosion and failure.

• Paper Gaskets: Inspect for holes and replace if needed.

• Injector O-rings: Inspect for cracks and replace if needed.

• Starter Motors: Check for stickiness and fix as needed.

• Catalytic Converters Protection: Ensure AFR protection is working unless no cats are installed.

• Muffler: Inspect pneumatic actuating system and valves.

• Belt Check: Inspect all belts for cracks tears and tension. 

Every 2 Years or 24,000 km:

• Chain Tensioners: Replace.

• Primary (Wideband LSU4.2) O2 Sensors: Replace to maintain engine performance.
  
  

Every 3 Years or 36,000 km:

• Chain Tensioners: Replace.

• Spark Plugs: Change.

• Fuel Injectors & Fuel Pressure: Test injectors for spray pattern and blockages.

• Oil Analysis: Send oil for analysis by an external party.

• Inspect Bolt/Pin: Near the chain tensioner for potential failure affecting the oil pump.

• Monitor Thermostat (ref. 183758): Check for occasional failure.

Every 5 Years:

• Battery Condition: Replace battery.

• Coil Packs and Spark Plugs: Replace coil packs and change spark plugs.

• Camshaft Timing: Recalibrate camshafts and set belt tension.

• Cambelt Replacement: Replace cambelt and consider variators.
  
  

After 10 years or 100,000km 

• Catalytic Converters: Replace.