• Lube oil filter gasket with engine oil. • On open systems carefully remove cooling system pressure cap. Coolant level will be approximately 30- 40 mm below pressure cap sealing surface. If level is low replace pressure cap and repair any/all other leaks. • Install oil filter as per filter manufacturers instructions. DO NOT OVER TIGHTEN • Fill crankcase with engine oil. • Start engine & run approximately 60 seconds. • Shut down engine, wait approximately 2 - 5 minutes and then check oil level. Inspect Coolant Hoses • When oil level is satisfactory start engine and check for any possible leaks. • Visually inspect coolant hoses and clamps.
• Replace any hose that shows signs of swelling, cracking, abrasion hardening or any other damage/deterioration. • Repair any/all leaks before returning unit to service. • Top-up cooling system with approved coolant. NOTE Engine Oil Specification : See, Lubrication System section Inspect Ignition System • Remove and inspect spark plugs. Replace as required. Inspect Accessory Drive Belts • Test secondary wires with an Ohmmeter. Maximum resistance repair replace as required. See, "Testing & Adjusting" of Cooling System Section. • Remove distributor cap and perform visual inspection of distributor cap and rotor. Replace cap & rotor if corrosion is found on contacts.
Inspect electrical system • Clean battery outer surfaces with a mixture of baking soda and water. • Inspect distributor breaker unit and housing for signs of corrosion. Repair replace as required. • Inspect battery outer surfaces for damage. Replace as required. Replace Spark Plugs • Remove battery cables and clean. • Utilizing a gentle twisting motion remove the secondary high voltage leads from the spark plugs. Replace any damaged leads. • Inspect battery cables for worn or missing insulation, frayed wire and/or corrosion. Replace as required. • Remove the spark plugs. Inspect Vacuum Lines and Fittings • Gap new spark plugs to proper specs.
• Visually inspect vacuum lines and fittings for physical damage such as brittleness, cracks, kinks and misrouting. Repair/replace as required. • Apply anti-seize compound to spark plug threads. • Install spark plugs. • Do not over tighten. • Solvent damage may cause vacuum lines to become soft. Vacuum lines damaged by oil and/or other solvents may collapse when the engine is running effectively closing the passage inside the line. • Install secondary high voltage leads. Check Coolant Level • Engine must be off and cold. • NEVER REMOVE THE PRESSURE CAP ON A HOT ENGINE. • The coolant level should be equal to the "COLD" mark on the coolant recovery tank.
Periodically remove the cooling system pressure cap and check coolant level inside system. The coolant level should be equal to the sealing surface of the pressure cap. If level is low replace pressure cap and repair any/all other leaks. • On closed systems visually inspect the coolant recovery tank and hoses for physical damage G424 Service Manual Maintenance 18