Engine and exhaust system
The following maintenance items must be performed as scheduled:
Engine: Check oil level.
Engine: Oil change, replace oil and bypass filters.
Engine: Visual inspection for leaks.
Engine: Adjust valves.
Engine (models from 9/89): Tighten the cylinder head bolts.
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Engine: Tighten the intake and exhaust manifold bolts.
Cooling and heating system: Check the coolant level. Check the concentration of the antifreeze. Visually check the tightness and external contamination of the radiator.
Cooling and heating system: Replace the cooling concentrate.
Gasoline engine: Check idle speed and CO content.
Injector engine: Check the throttle position sensor, adjust if necessary.
Ignition system: Check ignition timing, adjust if necessary.
Gasoline engine: Check spark plugs, replace if necessary.
Fuel filter: Replace.
V-belt: Check tension and condition.
Timing belt: Replace.
Dry air filter: Replace filter element.
Exhaust system: Check for damage.