Porsche 356 Bolt & Nut Sizes and Torque Values
/ 4
- Details
- Category: Troubleshooting & Repair
- Created on Sunday, 26 September 2010 14:01
- Last Updated on Wednesday, 10 October 2012 21:35
- Hits: 2905
Getting Down to Nuts & Bolts
Is your engine apart and you can't remember which bolts and nuts went where? Do you ever wonder what size bolt or nut is correct for your 356? If your engine has ever been rebuilt you most likely have an assortment of non-original sizes. Once you find the correct nut or bolt do you wonder how hard to tighten it?
NOTE: The 356 Registry is making this information available for your use and does not make any specific recommendations on any information contained here.
| NUT or BOLT | Size | Ft-Lbs |
| Axle Nuts | 36mm ATF | 398 |
| Cam Gear Bolts | 14mm ATF | 18 |
| Cam Plug Nuts | 8mm | 15-18 |
| Carburetor Mounting Nuts | 8mm/12mm ATF | 15 |
| Case Acorn Nuts - Copper Washers | 15mm ATF | 22 |
| Case Acorn Nuts - Beveled Washers | 15mm ATF | 29 |
| Case Perimeter Nuts | 13-14mm ATF | 15-18 |
| Connecting Rod Nuts | 14mm ATF | 33 |
| Crankshaft Pulley Bolt | 30mm ATF | - |
| Engine Mounting Bolts & Nuts | 17mm ATF | - |
| Engine Sheet Metal - Horizontal Surfaces | 6mm cheesehead screws | - |
| Engine Sheet Metal - Vertical Surfaces | 6mm bolts | - |
| Exhaust Pipe (muffler) | 8mm/12mm ATF (brass) | 15 |
| Exhaust Rocker | 8mm/13mm ATF | 15 |
| Flywheel Nut | 36mm ATF (1 7/16") | 350 |
| Fuel Pump Nuts | 12-13mm ATF | 15 |
| Fuel Pump Bolts | 8mm/13mm ATF | 15 |
| Generator Pulley Nut | 36mm ATF | - |
| Generator Stand Nuts | 8mm/14mm ATF | 15-18 |
| Generator to Cooling Fan Nut | 36mm ATF | 72 |
| Head Bolts | 10mm Allen | 22-25 |
| Heater Box Nuts | 8mm/12mm ATF | 15-18 |
| Intake Manifold Bolts | 8mm/13mm ATF | 15-18 |
| Intake Manifold Nuts | 8mm/13mm ATF | 15-18 |
| Intake Rocker | 8mm/13mm ATF (thin) | 15-18 |
| Lug Nuts | - | 94 |
| Muffler Clamp Nuts | 14mm ATF | 18 |
| Oil Cooler Nuts & Bolts - Old | 6mm/10mm ATF | - |
| Oil Cooler Nuts & Bolts - New | 8mm/12-13mm ATF | 15 |
| Oil Filter Can Bracket | 6mm/10mm ATF | - |
| Oil Filter Can Strap Bolt | 14mm ATF | 15 |
| Oil Filler Can Bolts & Nuts | 6mm/10mm ATF | - |
| Oil Pump Nuts | 6mm | 10 |
| Pressure Plate Bolts(to 1963) | 8mm/6mm Allen head | 15-18 |
| Pressure Plate Bolts(1963 on) | 8mm/13mm ATF | 15-18 |
| Pulley Shroud Bolts | short 6mm | - |
| Radius Arm to the axle tube flange | 12mm ATF | 65-72 |
| Rocker Stand Mounts (Cast Iron) | 17mm ATF | 29 |
| Rocker Stand Mounts (Aluminum) | 15mm ATF | 29 |
| Solex Air Cleaner Bolts | 10mm ATF | - |
| Third Piece Nuts | 8mm/12mm ATF | 15 |
| Wheel Bearing Cover | 10mm ATF (10G) | 40-43.5 |
Primary Sources & Additional Information
- "Porsche 356 Ersatzteil-Katalog" ("Catalog of Spare Parts"), published by Porsche, January, 1960
- "The Maestro's Little Spec Book" by Harry Pellow
- "Secrets of the Inner Circle" by Harry Pellow
If you have comments and/or additions for this page, please contact Barry Lee Brisco, Website Technical Editor, at This email address is being protected from spambots. You need JavaScript enabled to view it. .
