My 1987 Porsche 928 S4, 5 speed



 
 

Maintenance History Since 1987

Thanks  to the very good records of last two owners of this car (purchased for very nice sum of $63,000) - all maintenance records have been retained.

Here is a little history on this Porsche....


I am the third owner of this fine car.   First owner had it till 1999. The previous owner had the car for a short period of time and found that he had never driven it.  Here is the summary of the maintenance performed on this car.  Previous owner drove the car till mileage of 46,500. The following are applicable Option Codes: C02, P37, 018, 139, 302, 340, 474, 481, and 533 (see Table below for definitions).



Miles Date Services Done
Services done by previous owners
32K 9/15/95 Tune engine
All belts replaced, including the timing belt
Hood shocks
Replaced splash pan.
36K 3/10/97 Replaced Shifter joint
Pressure bled and tested cooling system

Replaced hose return adapter
.
37K 10/22/97 Brake pads incl. sensor
Brake fluid flush
39K 4/06/98 Replaced clutch hose and hydraulic fluid.
40K  7/24/98 90-W gear oil (one can added)
Removed rear suspension & replaced input shaft seal (P/S rack was leaking)
Transmission seal replaced and one quart gear oil added.
A/C receiver - dryer, low press compressor hose, replaced; system recharged.
44K 4/23/99 Re-tensioned Timing belt and serviced tensioned.
46K 6/20/00 New GTS/C2 wheels / New tires
SS Rear Muffler Bypass
New Floor mats
New leather shift boot.
Services done by Wojtek
47K 9/06/00 45K service (new Mobil 1 oil)
Replaced spark plugs, oil, fuel and air filters, air pump filter, and oil.
Cost:  $475.
47.5K 10/03/00 A/C repair:
1) Receiver dryer P/N 944.573.943.00
2) AC hose from compressor to condenser P/N 928.573.097.06
3) O Rings

Total cost: over $750.

49K 10/15/00 Replaced Installed new cruise control/turn signal assembly.
50K 3/08/01 Installed used cruise control computer.
51K 7/06/01 New hood shocks and new hood seals.
52K 9/18/01 Replaced Warning Control Unit with used unit (COOLANT indication failure).
52.5K 10/31/01 Front brake discs and pads replaced. Vibration dampers installed.
Short service performed: oil & filter; miscellaneous inspection performed.
55K 05/05/01 All wheels re-balanced (tire on wheel & wheel on car), and tires filled with Nitrogen. 
56K 07/01/02 Replaced interior temperature sensor inside center console.
56.6K 10/09/02 Replaced transmission fluid with Mobil 1 75 W-90 (5 quarts). 
57.2K 09/30/02 Added 2 Mobil 1 quarts to engine (was @ LOW Limit of the stick).
60K Jan 2003 Repaired two control switches: driver's seat back recline control (per Rennlist procedure), and sunroof Open-Close switch (forced opened switch and cleaned contacts).
62K Nov. 2003 Replaced entire clutch system:
  • master & slave cylinders,
  • pressure plate,
  • disc,
  • arm/bearing/sleeve set,
  • pilot bearing.

New exhaust flange gaskets.

New O2 sensor (after market Bosch from 928Intl). 

Used Mark's Pilot Bearing Pull-out Tool to take that bearing from hell out!

Total cost:  parts only:  over $900.

62K Jan 2004 Rebuilt Cruise Control Unit by Mazda Mark (RIP) for $60 and it still works great in 2011. 
64K 04/27/04 Changed oil pan gasket, replaced oil filter, filled with 10 quarts of Mobil 1 10-30W SuperSyn,

Replaced engine mounts,

Replaced & repacked rear axle boots,

Installed new Aluminum under tray,

installed new front wheel well front shrouds

Total cost: labor: $800; parts: $745; total: $1,545. 

64.5 07/15/04 Put new Michelin Pilot Sport S2 tires.  What a difference on cornering performance.

Tire Rack price for all four:  $780.

65.5K
11/10/04
Timing belt replaced after 9 years and 34K miles - still looks like new:
  • rebuilt water & oil pumps,
  • rebuilt tensioner and
  • installed new tensioner rollers (other sprockets were OK);
  • Nology wires and Silverstone plugs;

    Thermally insulated fuel rails with HI temp components (details);

    Cleaned fuel injectors;

    Short shifter installed (still getting use to it);

    New distributor cups and rotors installed;

    New parts installed under the intake manifold: Idle Stabilizer, "floppy" idle control valve and knock sensors;

    Intake manifold, valve covers, thermostat housing, water inlet elbow and control cables bracket painted (details);

    Polyurethane sway bar bushings (not a significant reduction in roll);

    Car seems to accelerate much better, with recognizable improved acceleration in 2nd gear.

    Total cost; parts: over $500; labor: over $2500, total: $3000

    68K
    12/15/05
    Suspension upgrade:
  • Bilstein/Eibach set for front and rear,
  • Front - rear anti-sway bar system by 928 Specialists,
  • leveled was car (170mm front/163mm rear),
  • middle bar setting was used
  • car was aligned. 
  • Shifting mechanism cap and rear joint replaced.

    New steering wheel from 928 Specialist installed.

    New analog clock installed. 

    Redline NS transaxle oil used for better shifting (this car was purchased w/o LSD option!!).

    Pod restored by Just Dashes (nobody else can do this pod - I know since I had to get new used one to get it done right); great results but pricy (I got it for $400, but now it is $600!!!)

    End result:

  • superb street performance,
  • no freeway harshness,
  • great cornering stability (very low body roll),
  • very smooth shifting - click, click, click, 
  • I am very happy with this setup.
  • Total cost:  parts: over $1900, labor: $1900; Total: $3800.

    75K
    2007 AC recharged twice

    Timing Belt re-tensioned approximately 7 years after being installed (very low mileage per year)

    Mobil 1 replaced with Torco (commercial synthetics in California were castrated by State of the key ingredients reducing cylinder wear).

    Radiator flushed at 70 miles

    Timing belt tension indication hardware wire termination failed (erroneous Timing Belt light) and was replaced approximately at 70 K miles.

    82K
    2017
    Steering Rack and High Pressure hose replaced (leaking); Delrin Steering Rack Bushing Kit upgrade
     

    This is the cost of doing timing belt (and the rest) if you neglect this car for 14 years!

    85K

    2018

    Long neglected Timing Belt & Other Needed Repairs

     

     

     

     

    FACTORY WATER PUMP/FACTORY COOLANT

    Unit

    Total

     

    1

    928 106 015 20 

    Water Pump - Factory LIST IS $1178.61 

    1,050.00

    1,050.00

     

    1

    92810613406

    Water Pump Gasket 

    2.75

    2.75

     

    8

    W00570625 

    Bolt 

    0.48

    3.84

     

    5

    W00570620 

    Bolt 

    0.45

    2.25

     

    13

    W040706 

    Washer 

    0.25

    3.25

     

    1

    928105 157 50G 

    Timing Belt - Gates 

    75

    75.00

     

    1

    92810561105

    Tensioner Gasket 

    11.63

    11.63

     

    1

    928 105 55208 

    Tensioner Boot 

    23.07

    23.07

     

    1

    999 5 12 564 02 

    Tensioner Clamp 

    4.4

    4.40

     

    1

    928 105 075 03 

    Tensioner Adjusting Bolt 

    15.23

    15.23

     

    1

    999 701 650 40 

    Tensioner O-ring 

    1.96

    1.96

     

    2

    000 043 305 75 

    Coolant- Factory LIST IS $45.71 

    39

    78.00

     

     

    2

    Distilled Water 

     

    2.95

    5.90

     

     

     

    LABOR LABOR-Remove covers and inspect. Disassemble and clean. Rebuild tensioner. Replace timing belt, water pump, tensioner gasket, boot, clamp, etc. 

     

    1,600.00

     

     

     

     

     

     

     

     

     

    SUBTOTAL 

     

     

    2,877.28

     

     

     

     

     

     

     

     

     

    TIMING BELT & RE-COATED CAM GEARS

     

     

     

    1

    928 105 5 12 12 

    Idler Roller 

    95

    95

     

    1

    92810557104

    Idler Bearing 

    69

    69

     

    2

    928 105 530 04 

    RC Cam Gear-(Re-coated Canadian) 

    250

    500

     

    1

    928 107 107 13 

    Oil Pump Gear 

    134.73

    134.73

     

    1

    928 105 125 14 

    Crankshaft Gear 

    198.21

    198.21

     

    1

    999 I 13 263 40 

    Seal Crankshaft Front 

    17.5

    17.5

     

    1

    99970 I 633 40 

    O-ring for Engine Oil Pump 

    8.25

    8.25

     

    3

    999 701 006 40 

    O-ring Oil Pump Bolts 

    3.08

    9.24

     

    1

    99911327540

    Oil Pump Shaft Seal 

    15

    15

     

    1

    999 192 306 50 

    Air Pump Belt – Factory

    20.18

    20.18

     

     

    1

    999 192 305 50 

    NC  Belt - Factory 

    38.18

    38.18

     

    1

    999 192 286 50 

    PIS Belt - Factory 

    20.26

    20.26

     

    1

    999 192 266 50 

    Alt. Belt - Factory 

    27.74

    27.74

     

    1

    928 106 238 08 

    Upper Radiator Hose - Factory 

    77.94

    77.94

     

    1

    928 10623909 

    Lower Radiator Hose - Factory 

    84.93

    84.93

     

    2

    W0540139 

    Clamp 

    2.45

    4.9

     

    1

    900 17404440 

    Dip Stick O-ring 

    3.67

    3.67

     

     

     

    LABOR LABOR-Replace cam gears, oil pump gear, tensioner roller, tensioner idler. Reseal oil pump, etc. Check and set cam timing

     

    640

     

     

    SUBTOTAL 

     

     

    1,964.73

     

     

     

     

     

     

     

     

     

    TEMPERATURE SENDERS AND CORRODED PARTS

     

     

     

    1

    WURTH SPRAY CLEANER Wurth Spray Cleaner 089093000 

    5.95

    5.95

     

    1

    MOAB 

    TIE MOAB Tie 

    1.75

    1.75

     

    2

    MISC Engine 

    Block Drain Plugs 

    3.7

    7.4

     

    2

    M07603AI216 

    Seal Ring 

    0.45

    0.9

     

    1

    928606201 01 

    Temp. Sender-Coolant 

    85

    85

     

    1

    928 606 126 00 

    Temp. Sender-Thermostat Housing 

    36.95

    36.95

     

    1

    944 606 170 02 

    Hall Sensor (Broken) 

    180

    180

     

    1

    92810612917

    Thermostat 

    32

    32

     

    1

    928 106 16300 

    Inner Thermostat Seal Ring 

    10

    10

     

    1

    999 70 I 632 40 

    Thermostat Oring 

    3

    3

     

    2

    W054924055 

    Clamp 

    3.4

    6.8

     

    2

    W054924060 

    Clamp 

    3.6

    7.2

     

     

     

     

     

     

     

     

    LABOR-Oil pressure sending unit casting loose, signs of oil leaks. Clean area. Replaced engine coolant block drain plugs that were stripped. Replace leaking temp senders. Replace broken hall sensor (belt & cam gear removed). Tired to remove thermostat to check rear seal and thermostat was stuck in housing and difficult to remove. Seal behind the thermostat was very bad. Replace both thermostat seals.

    240

     

    2

    92857471702

    Vacuum Elbow 

    5.76

    11.52

     

     

     

    LABOR-Vacuum line disconnected from flappy. Replace elbows to flappy valve. (Usually done with manifold off had to snake it in) 

    240

    240

     

     

    SUBTOTAL 

     

     

    868.47

     

     

     

     

     

     

     

     

     

    FUEL LINES      

     

     

     

    1

    928 FUEL LINE #4C 

    Fuel Hose Chassis to Front Damper 

    175

    175

     

    1

    928 FUEL LINE #2B 

    Fuel Hose Damper to Regulator 

    175

    175

     

    1

    928 110269 OY 

    Fuel Hose Front - Straight - Factory 

    86.28

    86.28

     

    1

    92811035909

    Fuel Hose 

    68

    68

     

     

     

     

     

     

     

     

    1

    928 FUEL LINE #5C

    Fuel Return Line to Fuel Cooler

    160

    160

     

     

     

     

     

     

     

     

     

     

    LABOR-Replace old fuel lines. None of the diaphragms in the fuel dampers or regulator are leaking at this time.

     

    480

     

     

    SUBTOTAL 

     

     

    1144.28

     

     

     

     

     

     

     

     

    1

    928 ODOMETER GEAR

    Odometer Gear 928 (I will rebuild this failed gauge later)

    25

    25

     

    3

    928 ODOMETER 

    CIRCLIP

    0

    0

     

     

     

     

     

     

     

     

     

    MISC.

     

     

     

     

     

     

    TIRE PRESSURE - IN -Fronts @30 and Rears at 32psi. OUT-Set fronts to 36 and Rears to 38 psi

    0

    0

     

     

     

     

     

     

     

     

     

    Subtotal

     

     

    $6,879.76

     

     

    Sales Tax (7.75% in sunny California)

     

    $285.18

     

     

    Total

     

     

    $7,164.94

     


     
     

                                 Option Codes:
     


    C02 Catalytic converter (CA shipped cars had C03 codes; C02 is the same converter but shipped outside of CA; C02 is good for CA)
    P37
    US special package for 1987 Porsche 928:
    158 Radio Reno SQR 46
    418 side strips
    490 HIFI Clangpacet (8 Loudspeakers)
    494 additional amplifier
    650 electric sliding roof
    018
    Sport steering wheel
    139
    Seat heating Left
    158
    Radio Reno SQR 46 (part of P37)
    302
    Type designated on rear end
    340
    Seat heating Right
    418
    side strips (P37)
    474
    Sport shock absorbers (Koni)
    481
    5 speed manual transmission
    490
    HIFI Clangpacet (8 Loudspeakers) (P37)
    494
    Additional amplifier (P37)
    533
    Alarm
    650
    Electric sliding roof (P37)


     
     
     


     
     
     
     
    HOME