911 and 930 tightening torques
105 figures from 10 torque tables in 2 Porsche workshop manuals, covering the air-cooled 911 from model year 1972 and the 930 turbo Carrera. Each row cites the manual and page it was read from. Extracted .
- Figures
- 105
- Tables
- 10
- Manuals
- 2
- Checked against a second unit
- 90
Read these against the manual, not instead of it. They were read by OCR from 40-year-old scans, and a misread digit looks exactly like a real number. Every row cites its page for that reason.
90 of the 105 figures were checked against a second unit. These manuals print each torque twice — Nm and kpm, or Nm and ft lbs — so the columns check each other, and a row whose two units disagree by more than the books’ own rounding is not published. That caught a 6.5 Nm clamp read as 65 Nm. The rows marked one unit onlyhad no second column to check against, so trust them less.
Nothing here is converted. Where a manual prints kpm it stays kpm, and a figure in ft lbs is the manual’s own conversion, not arithmetic done here.
105 torques
Porsche Workshop Manual 911 — from model 1972 on
Covers the Porsche 911 sold in the USA and Canada from model year 1972.
| Location | Fastener | Thread | Grade | Nm | kpm |
|---|---|---|---|---|---|
| Bracket for engine carrier | M10 | 40 | 4 | ||
| Wide clamp on fan housing | M6 | 6.5 | 0.65 | ||
| Oil pressure switch to crankcase | M10 x 1 | max. 20 | max. 2 | ||
| Temperature sender to crankcase | M14 x 1.5 | max. 25 | max. 2.5 | ||
| Oxygen sensor to catalytic converter | M18 x 1.5 | 50–60 | 5–6 | ||
| Cap nut on catalytic converter | M14 x 1.5 | 30 | 3 | ||
| Oil drain plug (oil tank) | M22 x 1.5 | 42 | 4.2 |
Porsche Workshop Manual turbo Carrera
Describes only the operations that differ from the 911, so its tables complement rather than repeat them.
| Location | Fastener | Thread | Grade | Nm | ft lbs | |
|---|---|---|---|---|---|---|
| Conrod nuts* | M10 x 1.25 | 50–55 | 36–40 | |||
| Crankcase | M10 | 35 | 25 | |||
| All bolts on crankcase and camshaft housing | M8 | 25 | 18 | |||
| Oil filter screen cover nuts | M6 | 10 | 7 | |||
| Flywheel | M12 x 1.5 | 150 | 108 | |||
| Flywheelfrom 1978 models | M10 x 1.25 | 90 | 65 | |||
| Bush and needle bearing to crankshaft | M6 | 10 | 7 | |||
| Pulley to crankshaft (without air conditioner) | M12 x 1.5 | 80 | 58 | |||
| Double-belt pulley to crankshaft (with air conditioner) | M12 x 1.5 | 170 | 123 | |||
| Safety valve plug to crankcase | M18 x 1.5 | 60 | 43 | |||
| Pressure relief valve plug to crankcase | M18 x 1.5 | 60 | 43 | |||
| Adapter (on neck for oil pressure transmitter) to crankcase | M12 x 1 | 35 | 25 | |||
| Adapter in crankcase (oil return line) | M12 x 1 | 120 | 87 | |||
| Cylinder head nuts** | M10, socket | 33 | 24 | |||
| Rocker arm shafts | M6, socket | 18 | 13 | |||
| Nut on camshaft | M27 x 2 | 150 | 108 | |||
| Bolt on camshaft | M12 x 1.5 | 120 | 87 | |||
| Adapter on cylinder head (air injection) | M10 x 1 | 15 | one unit only | |||
| Reactor to cylinder head | M8 | 20–23 | 14–17 | |||
| Spark plug | M14 x 1.25 | 25–30 | 18–22 | |||
| Intake manifold Threads and bearing surfaces lubricated with oil. * | M8 | 25 | 18 |
| Location | Fastener | Thread | Grade | Nm | ft lbs | |
|---|---|---|---|---|---|---|
| Console for engine carrier | M10 | 40 | 29 | |||
| Pulley to alternator | M16 x 1 | 29 | one unit only | |||
| Oil pressure control switch to crankcase | M10 x 1 | max. 20 | max. 14 | |||
| Temperature transmitter to crankcase | M14 x 1.5 | max. 25 | max. 18 | |||
| Oil pressure transmitter to adapter | M18 x 1.5 | max. 35 | max. 25 | |||
| Volume transmitter (for oil level indicator) to oil tank | M5 | 24 | one unit only | |||
| Oil drain plug (to cover for oil filter screen) | M22 x 1.5 | 42 | 30 | |||
| Oil drain plug (oil tank) governor housing, coil cooler or pipe oil cooler | M22 x 1.5 | 42 | 30 |
| Location | Fastener | Thread | Grade | Nm | ft lbs | |
|---|---|---|---|---|---|---|
| Drive shaft | Nut | M30 x 1.5 | 210 | 152 | ||
| Stub axle | Stretch bolt | M10 x 1.5 | 8.8 | 26–30 | 19–22 | |
| Stub axle | Bolt | M10 x 1.5 | 8.8 | 39–46 | 28–33 | |
| Gearshift rod | Conical ser. | M8 x 1.25 | 8.8 | 23–26 | 17–19 | |
| Gear housing | Backup light | M18 x 1.5 | 25–35 | one unit only | ||
| Gearshift forks | Nut | M6 x 1 | 8.8 | 9–11 | 6.5–8 | |
| Clamp, gears, transm. case, front and side covers | Nut | M8 x 1.25 | 22–25 | 16–18.5 | ||
| Shift lock, transm. case | Bolt | M10 x 1.5 | 8.8 | 15–18 | 11–13 | |
| Selector forks gear attachment) | Bolt | M8 x 1.25 | 8.8 | 24–26 | 17–19 | |
| Reverse gear Lock | Piug | M16 x 1.5 | 5.8 | 20–25 | 14–18.5 |
| Location | Fastener | Thread | Grade | Nm | ft lbs |
|---|---|---|---|---|---|
| Guide tube | Bolt | M6 x 1 | 8.8 | 8–10 | 6–7 |
| Clutch and starter gear | Bolt | M8 x 1 | 8.8 | 20–25 | 14–18.5 |
| Starter | Nut | M10 x 1.5 | 46–50 | 33–36 | |
| Holder to base Shift rod end Coupling | Nut | M6 | 8.8 | 6 | 4 |
| Clamp | Bolt | M8 | 8.8 | 25 | 18.5 |
| Location | Fastener | Thread | Grade | Nm | ft lbs |
|---|---|---|---|---|---|
| Support bearing to strut | Nut | M14 x 1.5 | 80 | 58 | |
| Support bearing to body | Capscrew | M10 | 8.8 | 47 | 34 |
| Carrier to body | Bolt | M12 x 1.5 | 8.8 | 90 | 65 |
| Carrier strut guard to body | Bolt | M10 | 8.8 | 47 | 34 |
| Stabilizer and suspension | Bolt | M8 | 8.8 | 25 | 18 |
| Guard | Bolt | M8 | 8.8 | 25 | 18 |
| Stabilizer to carrier strut | Bolt | M8 | 8.8 | 25 | 18 |
| Carrier strut,guard and stabilizer to body | Capscrew | M10 | 8.8 | 47 | 34 |
| Carrier strut and guard to carrier | Nut | M10 | 28 | 20 | |
| Control arm to body | Bolt | M10 | 8.8 | 47 | 34 |
| Nut on stub axle | Capscrew | M7 | 10.9 | 15 | 11 |
| Ball joint to strut | Uni stop nut | M8 | 22 | 16 | |
| Brake disc to wheel hub | Nut | M8 | 8.8 | 23 | 17 |
| Cover for brake disc | Bolt | M8 | 8.8 | 10 | 7 |
| Caliper to stub axle | Bolt | M12 x 1.5 | 8.8 | 70 | 51 |
| Brake line | Coupling | M10 x 1 | 12 | 9 | |
| Wheel to wheel hub | Nut | M14 x 1.5 | 130 | 94 |
| Location | Fastener | Thread | Grade | ft lbs | |
|---|---|---|---|---|---|
| Steering shaft to steering gear | Hex hd screw | M8 | 8.8 | 18 | one unit only |
| Steering shaft holder | Capscrew | M8 | 8.8 | 18 | one unit only |
| Universal joint to steering shaft | Hex hd screw | M8 | 8.8 | 18 | one unit only |
| Coupling flange to drive pinion | Hex nut | M10 | 29 | one unit only | |
| Cover to steering gear | Hex hd screw | M8 | 8.8 | 11 | one unit only |
| Counternut, center scréw | Hex nut | M8 | 13 | one unit only | |
| Tie rod to rack | Ball joint | M16 x 1.5 | 8.8 | 108 | one unit only |
| Location | Fastener | Thread | Grade | Nm | ft lbs | |
|---|---|---|---|---|---|---|
| Cover to body | Hex hd screw | M10 | 8.8 | 47 | 34 | |
| Strut to trailing arm | Excenter | M12 x 1.5 | 61 | one unit only | ||
| Strut to trailing arm | Hex hd screw | M12 x 1.5 | 10.9 | 120 | 87 | |
| Caliper to trailing arm | Hex hd screw | M12 x 1.5 | 8.8 | 60 | 43 | |
| Shock absorber to trailing arm | Hex hd screw | M14 x 1.5 | 125 | 90 | ||
| Shock absorber to body | Hex nut | M10 x 1 | 25 | 18 | ||
| Brake line | Coupling | M10 x 1 | 12 | 9 | ||
| Stabilizer to body | Hex hd screw | M8 | 8.8 | 25 | 18 | |
| Drive shaft flange | Capscrew | M10 | 12.9 | 83 | 60 | |
| Guard and brake backplate to trailing arm | Bolt | M8 | 8.8 | 25 | 18 | |
| Wheel to hub | Nut | M14 x 1.5 | 130 | 94 | ||
| Hub to drive shaft | Castle nut | M20 x 1.5 | 10.9 | 217–231 | one unit only | |
| Brake disc to hub | Ctsk screw | M6 | 8.8 | 5 | 4 | |
| Stabilizer to link | Nut | M12 x 1.5 | 85 | 61 | ||
| Stabilizer link to rear axle control arm | Bolt | M12 x 1.5 | 8.8 | 85 | 61 | |
| Adjusting lever to strut | Bolt | M16 x 1.5 | 10.9 | 245 | 177 | |
| Adjusting lever to strut * Refer to information on page 42 - 10. | Eccentric | M16 x 1.5 | 10.9 | 245 | 177 |
| Location | Fastener | Thread | Grade | Nm | ft lbs | |
|---|---|---|---|---|---|---|
| Brake force regulator to connector or ring adapter | M10 x 1 | 14 | one unit only | |||
| Ring adapter to brake master cylinder | Hollow | M10 x 1 | 5.6 | 16 | one unit only |
| Location | Fastener | Thread | Grade | Nm | ft lbs |
|---|---|---|---|---|---|
| Steering gear | Bolt | M10 | 8.8 | 47 | 34 |
| Ball socket to steering arm | Castle nut | M10 x 1 | 45 | 33 | |
| Ball socket to tie rod (lock nut) | Nut | M14 x 1.5104 | 45 | 33 | |
| Steering coupling to steering shaft | Bolt | M8 | 8.8 | 25 | 18 |
| Steering shaft to steering gear | Bolt | M8 | 8.8 | 25 | 18 |
| Steering shaft mount | Screw | M8 | 8.8 | 25 | 18 |
| Universal joint to steering shaft (lubricated with Optimoly HT) | Bolt | M8 | 8.8 | 20 | 14 |
| Coupling flange to drive pinion (self-locking} | Nut | M10 | 45 | 33 | |
| Case cover to steering gear | Bolt | M8 | 8.8 | 15 | 11 |
| Centering screw to steering lock | Stud | M8 | 10.9 | 2–3 | 1.4–2.2 |
| Lock nut on cen- tering screw | Nut | M8 | 18 | 13 |
What is not here
Five torque tables were read and then discarded, and two more gave no unit row. In the discarded five, more rows failed to parse than succeeded, which means the columns themselves were misread — and a table read that badly cannot be trusted for the rows that happened to come through, because those pair a torque with whichever fastener landed beside it. The two without units are worse: kpm and Nm differ by a factor of ten, so a figure with no unit is not a specification at all.
A third manual covering 1984 to 1989 was left out for a different reason. It is a third-party publisher’s service manual rather than a Porsche document, so its tables are that publisher’s compilation and not the factory’s figures.
Only the specification data is reproduced here. The repair procedures are authored text and the exploded views are drawings; both stay in the manuals.