Porsche 928 S4 – Owner’s Manual

 

Model Year

1987

 

 

 

 

 

 

 

 

Contents

 

 

 

 

 

 

 

 

 

 

 

From the “Porsche 928 S4 Owner’s Manual”, available from 928 Specialists.

 

928 S4 page

 

John Pirtle

 

 

 

 

 

 

 

Windshield washer fluid reservoir

 

The transparent fluid reservoir is located in the right rear in the engine compartment, in front of the expansion tank.  As clear water is normally not adequate to keep your windshield and headlights clean, add a cleaning solution to the water.

 

To assure that the windshield washer and the headlight washer (where applicable) systems also function at freezing temperatures, anti-freeze/cleaning solution must be added to the water beforehand.  Follow the instructions on the can for the right amount to be used.

 

Do not use engine coolant antifreeze or any other solution that can damage the car paint.

 

 

Intensive windshield cleaning system reservoir

 

The reservoir is located in the engine compartment beneath the windshield.

 

To prevent damage and discoloration to paintwork, you should use only “Porsche Special Silicon Remover”.  Other cleaning agents are not suitable for intensive cleaning, but can, if this special cleaning agent is not obtainable, be added to the water of the washer system in the mix ratio stated by the manufacturer.  “Porsche Special Silicone Remover” is safe against frost down to -25°C.

 

 

 

 

 

Brake fluid reservoir

 

The brake fluid reservoir is located in the engine compartment.

 

The brake fluid reservoir has three chambers: one for each of the dual brake circuits, and one for the clutch.

 

Check the brake fluid level regularly.  Since the reservoir is transparent, the fluid level can be checked without removing the filler cap.  The fluid level should always be between the MIN and MAX marks.

 

To add brake fluid, unscrew the cap.  The vent bore in the cap should be kept clean.

 

If the brake fluid level should drop below the MIN mark, the central warning light and the brake fluid warning light will flash (see “Central warning light system”).

 

Pull off the road, stop the engine and add brake fluid immediately or contact the nearest Porsche dealer to have the cause located and corrected.

 

WARNING

  • Every 2 years the brake fluid has to be replaced.  See your Warranty & Maintenance booklet.

 

  • If brake fluid must be added to the reservoir, use only new and unused DOT 3 or DOT 4 brake fluid that meets SAE specification J 1703 and conforms to Motor Vehicle Safety Standard 116.

 

  • Do not use any other brake fluid or brake fluids that have absorbed moisture from the open air, or brake fluid that is dirty.  It may cause premature wear or unreliable braking action.

 

  • Do not add or mix DOT 5 silicone type brake fluid with the brake fluid in your vehicle as severe component corrosion may result.  Such corrosion could lead to brake system failure.

 

  • The brake warning light does not indicate brake fluid level.  Check fluid level between regular maintenance services.

 

  • Brake fluid is poisonous.  Brake fluid is also harmful to the paint of your vehicle.

 

 

 

 

 

Power steering fluid reservoir

 

The reservoir is located in the engine compartment on the left side.

 

To check fluid level . . .

 

  1. Remove cap from reservoir.

 

  1. With engine running at operating temperature, the fluid level should meet the mark on the reservoir.  If necessary, top up with ATF Dexron®.

 

  1. Reinstall cap and make sure that sealing ring is seated correctly.

 

If the engine is not running, power assisted steering is no longer effective.  You can continue to steer the car but more effort will be required to turn the steering wheel.

 

 

 

 

 

Changing air cleaner filter element

 

A dirty air cleaner not only reduces engine performance, but can lead to premature engine wear.  The filter element must be replaced at the intervals listed in your Maintenance Schedule.  If driving is mostly done in areas where the air is very dusty, the air cleaner should be checked and cleaned frequently – perhaps daily.

 

  1. Detach air intake hoses from air cleaner housing.  Make sure that each hose stays connected to the toothed belt covers.

 

  1. Loosen rubber fasteners and remove top of filter housing together with filter element.

 

  1. Clean filter housing with lint-free rag and install new filter element.

 

  1. Reattach air intake hoses to air cleaner housing.

 

WARNING

The paper filter element must never be cleaned or soaked with gasoline, cleaning solvents or oil.  Doing so may cause a fire or explosion and result in serious personal injury.

 

 

 

 

 

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