INTRODUCTION
Use this article to quickly find specifications related to servicing and on-vehicle adjustments. This is a quick-reference article to use when you are familiar with adjustment procedure and only need a specification.
CAPACITIES
| Application | Amp Hr. Rating |
|---|
| All Models | 75 |
| Application | Quantity |
|---|
| Crankcase (Including Filter) |
| Oil Change Capacity | (1) 9.5 Qts. (9.0L) |
| Total Oil Capacity | (1) 12.2 Qts. (11.5L) |
| Automatic Transmission (Dexron-II D) |
| Dry Fill | (2) 9.5 Qts. (9.0L) |
| Service Fill | 3.2 Qts. (3.0L) |
| Manual Transmission (SAE 75W-90 GL-5) |
| 911 Carrera | 3.8 Qts. (3.6L) |
| 911 Carrera 4 - Front Axle | 1.27 Qts. (1.2L) |
| 911 Carrera 4 - Rear Axle | 4.02 Qts. (3.8L) |
| (1) Check oil level with vehicle on level ground. Ensure engine isrunning at idle and normal operating temperature. (2) Differential oil capacity is 1.9 pts. (0.9L) with Tiptronic automatic transmission. Use SAE 75W-90 GL-5 oil. |
| (1) | Check oil level with vehicle on level ground. Ensure engine isrunning at idle and normal operating temperature. |
| (2) | Differential oil capacity is 1.9 pts. (0.9L) with Tiptronic automatic transmission. Use SAE 75W-90 GL-5 oil. |
SERVICE INTERVALS & SPECIFICATIONS
| Component | Miles |
|---|
| Air Filter (1) | 30,000 |
| Air Pump Filter | 30,000 |
| Automatic Transmission Fluid & Filter | 30,000 |
| Camshaft Drive Belt (2) | 60,000 |
| Fuel Filter | 60,000 |
| Manual Transmission Fluids | 60,000 |
| Oil | 15,000 |
| Oil Filter (3) | 30,000 |
| Spark Plugs | 30,000 |
| "V" Belt & Polyrib Belt | 30,000 |
| (1) Check air filter every 15,000 miles and replace if necessary. (2) Check camshaft and balance shaft belt tension after 2000-2500 miles. (3) Equipped with 2 oil filters. |
| (1) | Check air filter every 15,000 miles and replace if necessary. |
| (2) | Check camshaft and balance shaft belt tension after 2000-2500 miles. |
| (3) | Equipped with 2 oil filters. |
| Application | (1) Deflection - In. (mm) |
|---|
| A/C Compressor | 13/64 (5) |
| Alternator (2) & Cooling Blower | 13/64 (5) |
| (1) With light pressure applied to center of belt. Power steering pump belt tension is not adjustable. (2) If alternator belt is too loose, take one shim from between belt pulley and mount it in the front of the foremost (frontmost) half of the belt pulley. DO NOT alter the total number of shims (6). This procedure correctly increases belt tension. |
| (1) | With light pressure applied to center of belt. Power steering pump belt tension is not adjustable. |
| (2) | If alternator belt is too loose, take one shim from between belt pulley and mount it in the front of the foremost (frontmost) half of the belt pulley. DO NOT alter the total number of shims (6). This procedure correctly increases belt tension. |
ENGINE COMPRESSION
Check engine compression with engine at normal operating temperature and specified cranking speed, all spark plugs removed (on dual plugs, remove exhaust side only) and throttle wide open.
| Application | Specification |
|---|
| Compression Ratio | 11.3:1 |
| Compression Pressure |
| Normal | 142-184 psi (10-13 kg/cm 2 ) |
| Minimum | 107 psi (7.5 kg/cm 2 ) |
| Maximum Variation Between Cylinders | 22 psi (1.5 kg/cm 2 ) |
COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
Note. Hydraulic lifters are used. No adjustment is required.
IGNITION COIL
| Application | Primary | Secondary |
|---|
| All Models | .4-.6 | 5000-7200 |
IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|
| Plug Connectors | 3000 |
| Distributor Cap Connector | 1000 |
| (1) Cap and plug connector only. |
| (1) | Cap and plug connector only. |
HIGH TENSION WIRE RESISTANCE (1)
SPARK PLUGS
| Application | Bosch No. |
|---|
| All Models | FR6LDC/FR 5 DTC |
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|
| All Models | .026 (.70) | (1) 22 (30) |
| (1) DO NOT use lubricant on spark plug threads. |
| (1) | DO NOT use lubricant on spark plug threads. |
SPARK PLUG SPECIFICATIONS
Distributor Rotation. Scheme 1
Scheme 1: Distributor Rotation
Firing Order 1-6-2-4-3-5. Scheme 2
Scheme 2: Firing Order 1-6-2-4-3-5
IGNITION TIMING
Ignition timing is controlled by Digital Motor Electronics (DME) engine management system and is not adjustable. Value given in IGNITION TIMING is for verification purpose only.
| Application | Degrees @ RPM |
|---|
| Automatic Transmission | TDC +/- 3 @ 710-790 |
| Manual Transmission | TDC +/- 3 @ 760-840 |
FUEL PUMP
| Application | Pressure psi (kg/cm 2 ) | Volume In 30 Sec. Pts. (L) |
|---|
| All Models | (1) 52-58 (3.6-4.0) | 1.8 (.85) |
| (1) Unregulated pressure (no vacuum applied to pressure regulator). Regulated pressure (vacuum applied to pressure regulator) is 45-51 psi (3.1-3.5 kg/cm 2 ). |
| (1) | Unregulated pressure (no vacuum applied to pressure regulator). Regulated pressure (vacuum applied to pressure regulator) is 45-51 psi (3.1-3.5 kg/cm 2 ). |
INJECTOR RESISTANCE
| Application | Ohms |
|---|
| All Models | 16 |
IDLE SPEED & MIXTURE
| Application | (1) Idle RPM | (2) CO Level |
|---|
| Automatic Transmission | 710-790 | 0.4-1.2 % |
| Manual Transmission | 760-840 | 0.4-1.2 % |
| (1) Idle RPM is controlled by DME and is not adjustable. (2) With oxygen sensor connected. Measurement is taken in front of catalytic converter. Hydrocarbon level should be equal to or less than 300 parts per million (ppm). |
| (1) | Idle RPM is controlled by DME and is not adjustable. |
| (2) | With oxygen sensor connected. Measurement is taken in front of catalytic converter. Hydrocarbon level should be equal to or less than 300 parts per million (ppm). |
FAST IDLE SPEED
Fast idle speed is controlled by DME engine management system and is not adjustable.
THROTTLE VALVE SWITCHES
Vehicles with manual transmissions use a Closed Throttle Position (CTP) switch and a wide open (full) throttle switch. Vehicles with Tiptronic (automatic) transmission use a CTP switch and a throttle valve potentiometer. Potentiometer is used exclusively for transmission control.
| Application | Ohms |
|---|
| Closed Throttle Position (CTP) Switch (1) |
| Throttle Valve Closed | Less Than 10 |
| Throttle Valve Open (2) | Infinite |
| Throttle Valve Potentiometer (3) |
| Throttle Valve Closed (Idle) | 0.5 |
| Throttle Valve Open (Full Throttle) | 4000 |
| Wide Open (Full) Throttle Switch (4) |
| Throttle Valve Closed | Infinite |
| Throttle Valve Open (5) | Less Than 10 |
| (1) Resistance is measured between terminals No. 1 and 2. (2) Throttle valve angle opening greater than one degree. (3) Check potentiometer resistance between terminal No. 2 (Green/Yellow wire) and terminal No. 3 (Brown wire). (4) Resistance is measured between terminals No. 2 and 3. (5) Throttle valve must be at least 2/3 open. |
| (1) | Resistance is measured between terminals No. 1 and 2. |
| (2) | Throttle valve angle opening greater than one degree. |
| (3) | Check potentiometer resistance between terminal No. 2 (Green/Yellow wire) and terminal No. 3 (Brown wire). |
| (4) | Resistance is measured between terminals No. 2 and 3. |
| (5) | Throttle valve must be at least 2/3 open. |
THROTTLE VALVE SWITCH RESISTANCE
