Periodic Maintenance Schedule
Complete maintenance schedule for the Porsche 924, 944, and 968, covering service intervals from break-in through 60,000 miles, with additional guidance on timing belts, water pumps, and fluid change intervals.
Introduction
The following maintenance schedule is based primarily on the recommendations from the Porsche Maintenance and General Repairs Manual, with additional recommendations and in some cases more stringent intervals than those specified by Porsche.
Maintenance Schedule
Required At 500–2,000 Miles / 800–3,200 km (New or Freshly Rebuilt Engine)
Note: This is the initial break-in oil change recommended by Porsche for a new engine. Apply this recommendation for any new or freshly rebuilt engine.
- Change engine oil and filter
- Engine: visual inspection for leaks
- Cooling and heating system: check for leaks
- Coolant hoses: check condition and tighten connections
- Radiator: visual inspection for external fouling
- Coolant (antifreeze): check level and antifreeze content
- Crankcase ventilation: check tightness of hose connections
- Intake air: check hoses, lines, and connections for tightness
- Brake pedal: check play and adjust if necessary
- Brake hoses and lines: visual inspection for leaks, damage, and corrosion
- Brake fluid level: check and top off if necessary
- Clutch: check play and adjust if necessary
- Manual transmission: visual inspection for leaks, check oil level, top off if necessary
- Automatic transmission: check fluid level and top off if necessary
- Exhaust system: visual inspection for leaks and damage; check screw connections for tightness
- Tires: check condition and correct tire pressure
During road or dynamometer test:
- Brake pedal, parking brake, brake power assist unit, clutch, automatic speed control, steering, heating, air conditioner, and instruments: check operation
- Kickdown: check operation
- Engine: visual inspection for leaks
Required At 500–2,000 Miles / 800–3,200 km (After Timing Belt Replacement)
- Check tension and condition of timing (and balance shaft) drive belts
Required At 1,800–3,000 Miles / 3,000–5,000 km (New Vehicles)
- Wheel alignment service
Required Every 7,500 Miles / 12,000 km
- Change engine oil and filter (Turbo engines only)
Note: While Porsche recommends a 7,500-mile oil change interval for Turbos and a 15,000-mile interval for normally aspirated cars, shorter intervals are beneficial to engine longevity (bearings, rings, valve train). An interval no longer than 5,000 miles / 8,000 km is strongly recommended. Use only a Mahle oil filter with check valve or a Porsche OEM filter.
Required Every 15,000 Miles / 24,000 km
- Change engine oil and filter (see oil change note above)
- Engine: visual inspection for leaks
- Cooling and heating system: check for leaks
- Coolant hoses: check condition and tighten connections
- Radiator: visual inspection for external fouling
- Coolant (antifreeze): check level and antifreeze content
- Crankcase ventilation: check tightness of hose connections
- Intake air: check hoses, lines, and connections for tightness
- Brake pedal: check play and adjust if necessary
- Brake hoses and lines: visual inspection for leaks, damage, and corrosion
- Brake fluid level: check and top off if necessary
- Brake system: visual inspection of brake pads and discs for wear
- Clutch: check play and adjust if necessary
- Clutch plate: check for wear
- Hydraulic clutch actuator: visual inspection for leaks
- Steering gear: check screw connections for tightness; visual inspection of bellows for damage
- Tie rod links: check play, tightness, and dust caps
- Power-assisted steering: visual inspection for leaks; check fluid level and top off if necessary
- Ball joints: visual inspection of dust caps for damage
- Wishbone: check screw connections for tightness
- Front wheel bearings: check play and adjust if necessary
- Rear wheel bearings: check play and adjust if necessary
- Clutch release lever and secondary spring: lubricate
- Manual transmission: visual inspection for leaks; check oil level and top off if necessary
- Automatic transmission: check fluid level and top off if necessary
- Drive shafts: visual inspection of sleeves for leaks and damage
- Exhaust system: visual inspection for leaks and damage; check screw connections for tightness
- Tires: check condition and correct tire pressure
- Door arrester (latch mechanism): check operation and lubricate
- Door hinges: lubricate
- Door, engine hood locks, and safety hooks on front hood: check tightness and function
- Door, hood, and roof seals: remove abraded rubber; apply a suitable conditioning agent
- Vehicle lighting: check operation
- All headlights: check setting and adjust if necessary
- Horn: check operation
- Retractable headlights: lubricate rods
- Throttle actuator: check for smooth running
- Windshield washer system: check function, fluid level, and nozzle setting
- Headlight washer: check operation, fluid level, and nozzle setting
- Battery: check fluid level and top off if necessary
- All electrical control equipment and optional extras: check operation
- Heater, ventilation, and air conditioner blower: check operation
During road or dynamometer test:
- Brake pedal, parking brake, brake power assist unit, clutch, automatic speed control, steering, heating, air conditioner, and instruments: check operation
- Kickdown: check operation
- Engine: visual inspection for leaks
Required Every 30,000 Miles / 48,000 km
- Change engine oil and filter
- Check tension and condition of timing (and balance shaft) drive belts
- Check tension and condition of V-belt (power steering) and poly-rib belt (A/C / alternator)
- Replace spark plugs (at minimum every two years)
- Replace air filter
- Automatic transmission: change ATF and clean ATF strainer
Required Every 60,000 Miles / 96,000 km
- Manual transmission: change oil
- Automatic transmission: change oil in differential
Other Required Maintenance
Brake fluid and engine coolant should be replaced every two years regardless of mileage. Cars used on track should have brake fluid changed at least once a year. Some PCA regions require proof of a brake fluid change within 3 months of a DE event for tech inspection — confirm with your regional club.
Timing belt and balance shaft belt:
- 944: change at 45,000 miles
- 968: change at 60,000 miles
- Both: check belt condition and tension every 15,000 miles
The 15,000-mile inspection interval assumes the car is driven regularly. If a timing belt reaches two years of age before the 15,000-mile inspection point, check tension and condition at that two-year mark and annually thereafter.
Water pump:
- 944: an interval past 100,000 miles is unusual; replacing the water pump at every other belt change (approximately 90,000 miles) is recommended
- 968: the pump may survive to the second belt change at 120,000 miles, but monitor closely for signs of failure after 100,000 miles
Timing belt tensioners and rollers: Spin each roller by hand at every belt replacement. If a roller is noisy, replace it. Replace all rollers at every other belt change, unless an individual roller was replaced during the immediately preceding belt change. On pre-1987 944s, the timing belt tension roller stud should also be replaced at every other belt change.