Technical Bulletin

Subject::

Spark Plugs

Pert Identifier

2870

Number

8805

iSXr

Below is a listing of all tested and approved spark plugs.

Model

Model Year

Make

Type

Electrode Gap in mm

924

1977-82

Bosch

WR6DS

0.7 + 0.1

924 Turbo

1981-82

Bosch Champion

WR6DS N7GY

0.7 + 0.1 0,7 + 0.1

924S

1987-88

WR7DP*

RN9YC

0.7 + 0.1 0.7 + 0.1

944

1983-85/1

Bosch Champion

WR8DS RN10GY

0.7 + 0.1 0.7 + 0.1

944

1985/2-89

WR7DP*

RN9YC

0.7 + 0.1 0.7 + 0.1

Turbo/Turbo S

1986-89

Bosch

WR7DC

0.7 + 0.1

944S

1987-88

Bosch

WR7DC

0.7 + 0.1

"Platinum plugs may only be installed at customers request and not during warranty repairs.

Model

Model Year

Make

Type

Electrode Gap in mm

912

1966-69

Bosch Champion

W6BC L82Y

0.6 + 0.1 0.6 + 0.1

912E

1976

Bosch

WR7DC

0.7 + 0.1

911, 911L

1965-68

Bosch Champion

W4DPO N6YC

0.55 0.70

911S

1966-68

Bosch

W3DPO

Page 1 of 4 September 23, 1988

Subject;:

Spark Plugs

Par« Identifier

2870

Number

8805

Model

Model Year

Make

Type

Electrode Gap in mm

911T

1969-71

Bosch

W5DC

0.7 + 0.1

911E 911S

1969-71

Bosch

W3DPO

0.55

911T

1972-73

Bosch

W5DPO

0,55

911E 911S

1972-73

Bosch

W3DPO

0.55

911

1974-75

Bosch

W6DPO

0.55

911S

1974-77

Bosch

W5DPO

0.55

911 Turbo 911 SC

1976-79 1978-79

Bosch Bosch

W3D PO W8DC

0.60 0.7 + 0.1

911 SC

1980-83

Bosch

W5DC

0.7 + 0.1

Carrera

1984-89

Bosch Bosch Champion

WR7DC WR7DP* RN7YC

0,7 + 0.1 0.7 + 0.1 0.7+0.1

911 Turbo

1986-89

Bosch

W3DPO

0.7 + 0.1

*Platinum plugs may only be installed at customers request and not during warranty repairs.

Model

Model Year

Make

Type

Electrode Gap in mm

928

1978-79

Bosch

W8DC

0.7 + 0.1

928/ 928S

1980-84

Bosch

WR8DS

0.7 + 0.1

928S

1985-86

Bosch

WR7DC

0.7 + 0.1

928 S4

1987-89

Bosch

WR7DC

0.7 + 0.1

Page 2 of 4 September 23, 1988

All

8805

— spark plug tightening torque: 30 Nm (21.6 ft. lbs.)

— it is recommended to lubricate the threads of spark plugs lightly with graphite grease (Molykote paste HTP white), or equivalent, prior to installation. Make sure paste is kept off the electrodes and the Inside of the spark plug!

Resistor Type Spark Plugs

Resistor spark plugs are used since M.Y. 1985 to eliminate radio Interference. These spark plugs may also be used in older models. Resistor spark plugs can be identified by the "R" in the type designation e.g. WR7DC.

Bosch Platinum Spark Plugs

Spark plugs designated with the letters "DPO", or W3DPO on the new Bosch spark plug Designation System correspond with the conventional design platinum spark plugs from the old system which were W280P21.

Spark plugs with the letters "DP" or CP or W5DP or W3DP are platinum spark plugs of the new design with a sintered center electrode. These spark plugs must not be installed when conventional desian platinum spark plugs "P21" or "DPO" only are specified.

Bosch Spark Plugs

Super

Super

Page 3 of 4 September 23, 1988

All

(3roup I 2

8805

ORDERING INFORMATION

Bosch

to Porsche

W3CC

999 170 162 90

W3DP

Use W3DPO

W3DPO

999 170 128 90

W4CS

999 170 140 90

W4DPO

999 170 008 90

W5DC

999 170 165 90

W5DPO

999 170 017 90

W68C

999 170 167 90

W6D

999 170 056 90

W6DPO

999 170 049 90

WR6DS

999 170 175 90

WR7DC

999 170 158 90

WR7DP

999 170 174 90

WR7DS

N 017 81137

W8D

999 170 134 90

W8DC

999 170 170 90

WR8DS

999 170 062 90

PCNA Technical Bulletins are intended for use by professional technicians, not a "Dc-lt-yourselfer" They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Special tools may be required to perform certain operations identified in these bulletins. Use of tools and procedures other than those recommended in these bulletins may be detrimental to the safe operation of your vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job property and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have thai condition. See your Porsche Dealer for information on whether your vehicle may benefit from the Information. Part numbers listed In these buUetlna are for reference only. Always check with your authorized Porsche dealer to verify correct part numbers.

J «1988 Porsche Care North America, inc. ___________

Subject: Survey of DME, LH/EZF and LH/EZK

Control Units

Part Identifier

2470/2825

Number 8806

This Technical Bulletin contains a listing of oontrol unit part numbers and coding plug, adapter plug and oxygen sen$or applications. Always consu/t with the Parts Department for the latest part number information.

4 Cylinder Cars from Model Year 1984

Vehicle Type

Control Unit

Coding Plug

Adapter Plug

Oxygen Sensor

Model Year

1984 and

1985 (85/1)

944 618 111 01

944 606 133 00 49 States 944 606 135 00 California

Model Year 1985 (85/2)

944 618 121 02 Standard until about 5/85 944 618 121 04 Standard from about 6/85 and Replacement Part for

944 618 121 02

944 606 135 01

Model Year 1986

944 618 121 04

94461252501 Calif, only

944 606 135 01

944 Turbo Model Year 1986

951 618 121 02

944 61252501 Calif, only

Model Year 1987

944 618 121 04

944 612 52501 Calif, only

944 606 135 01

Model Year 1987

| 944 618 121 04

944612 52501 Calif, only

944 606 135 01

944 Turbo Model Year 1987

951 618 121 02

944 61252501 Caltf. only

Replacement

Part:

944 618 124 01

928607 42100 Calif, only

Technical Bulletin

Starter Cable Routing

Subject;

Figure 1

Important Notice

Page 1 of 1 October 14, 1988

Technical Bulletin

Model

928 S4

Group 2

Starter Cable Routing

Part; Identifier

2760

Number

8809

Figure 1

Important Notice

PCNA Technical Bulletins are intended for use by professional technicians, not a "Do-it-yourselfer." They are written to inform these technicians of conditions that may occuron some vehicles, or to provide information that could assist in the proper service of a vehicle. Special toois may be required to perform certain operations identified in these bulletins. Use of too s and procedures other than those recommended in these bulletins may be detrimental to the safe operation of your vehicle Properly trained technicians have the equipment, toois, safety instructions and know-how to do a job properly and safely If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will havethat nnmhi^r ^/T ¿Tn DeateI,or jnformati™ °n whether your vehicle may benefit from the information. Part numbers listed m these bulletins are for reference only. Always check with your authorized Porsche dealerto verify correct pan numDBrs.

®1988 Porsche Cars North America, Inc.

Subject;

The starter cable (yellow wire, terminal 50) could touch the engine cover plate on 1987 Model Cars and 1988 Model Cars up to VIN 92 JS861591 if the tie-wrap (arrow in Fig. 1)' is missing or Incorrectly installed.

When engine cover plate is removed, check tightness and location of tie-wrap. If tie-wrap is missing, install tie-wrap. Refer to arrow in Fig. 1. Check starter cable insulation and tape the cable if necessary.

928 S4 l

Calibrating Fuei Level System

Part: Identifier

2015

Number 8810

Il N

fei S

Model Year 1989

If instrument display "Fuel Reserve" is inaccurate or the fuel tank, fuel level sender or instrument cluster is replaced, the fuel level system must be calibrated.

Calibrating procedures:

1. Fill a completely drained fuel tank with precisely 15 liters (3.% gallons) of gasoline.

2. Wait at least one minute.

3. Pull back the operating lever of the backlighted instrument cluster {Fig, 1) and turn on the ignition switch simultaneously until

TANK.EICHEN

ir~u

LITER

is displayed in instrument cluster.

4. Press the zero button (Fig. 2) until the number 15 appears in the center display box.

This indicates fuel level system is calibrated.

Calibrating procedures are stopped by turning off the ignition or starting the engine.

Figure 1

H^^KM^Îwr J; '' aWjmBBBM

Figure 2

Important Notice <

PCNA Technical Bulletins are intended for use by professional technicians, not a "Do-it-yourselfer." They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Special tools may be required to perform certain operations identified in these bulletins. Useof tools and procedures other than ¡hose recommended In these bulletins may be detrimental to the safe operation of your vehicle. Properly trained technicians have the equipment, tools, safety Instructions and know-howtodoajobproperlyand safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will havethat condition. See your Porsche Dealer for information on whether your vehicle may benefit from the information. Part numbers listed in these bulletins are for reference only. Always check with your authorized Porsche dealer to verify correct part numbers.

©1983 Porsche Cars North America, Inc.

Page 1 of 1 November 18, 1988

928 S4

Constant Current Draw

Pert Identifier

2706

Number 8812

When checking constant current draw on a battery, proceed as follows:

1. Remove ignition key from ignition switch,

2. Open rear hatch and disconnect two-pin connector for rear hatch switch.

3. Lock doors.

4. Disconnect battery ground cable from body.

5. Connect ammeter between ground cable and body. Reading: After approximately 15 seconds maximum 30 milliamps.

Important: Several components such as temperature sensors continue to draw current after engine Is shut off. Therefore, this test should only be performed after engine Ss turned off for at least 45 minutes.

m "ff

PCNA Technical Bulletins are intended for use by professional technicians, not a "Do-it-yourselfer." They are written to inform these technicians of conditions that may occur on some vehicles, or to provide Information that could assist in the proper service of a vehicle. Special tools may be required to perform certain operations identified in these bulletins. Use of tools and procedures other than those recommended in these buiietins may be detrimental to the safe operation of your vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your Porsche Dealer for information on whether your vehicle may benefit from the information. Part numbers listed In these bulletins are for reference only. Always check with your authorized Porsche dealer to verify correct part numbers.

©1988 Porsche Cars North America, Inc.

Page 1 of 1 December 2,1988

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