Torque Specifications
Background
Torque is the measure of the force applied to produce rotational motion and is determined by multiplying the applied force by the distance from the pivot point to the point where the force is applied (that is: Torque = Force x Moment Arm). In the English system, torque is measured in foot-pounds, abbreviated as as ft-lb, or inch-pounds. In the Metric system, torque is measured in Newton-meters, abbreviated as MM. Useful conversions are:
- 8.851 inch-pounds = 1 Newton-meter
- 1 foot-pound = 12 inch-pounds
- 16 ounce-inches = 1 inch-pound
General torque
Use this general torque guideline for zinc plated (and stainless where noted) dry bolts unless otherwise specified for various assembly and functional use.
| SAE English | 1/4 - 20 to 28 | 5/16 - 18 to 24 | 5/16 stainless | 3/8 - 16 to 24 | 3/8 stainless | 7/16 - 14 to 24 | 1/2 - 13 to 20 | 9/16 - all | 5/8 - all |
|---|---|---|---|---|---|---|---|---|---|
| Torque ft-lb | 8 to 10 | 17 to 19 | 11 | 30 to 34 | 16 | 48 to 54 | 75 to 83 | 100 | 100 |
| SAE Metric | M8 | M10 | M12 | M14 | M16 |
|---|---|---|---|---|---|
| Torque ft-lb | 18 | 33 | 61 | 98 | 120 |
Torque seal
Applying torque seal is an inexpensive method to detect vibration loosening. This seal is applied to compression fittings, studs, nuts, parts, and assemblies after proper torque and/or position has been verified. Visually inspection can then detect any movement since torque seal becomes brittle and will crack under any movement. With fast-drying adhesion to all metals and to most other surfaces, torque seal can be coded to different torque settings by using different high visibility, daylight fluorescing colors:
- green = under 50 ft-lb
- yellow = 50-75 ft-lb
- orange = 75-100 ft-lb
- red = over 100 ft-lb
Mk3.1 torque recommendations
All torque measurements in ft-lbs (foot-pounds).
References:
- FFR general recommendations
- Summit Racing engine torque recommendations
| Ford Racing Boss 302 | Torque |
|---|---|
| main cap bolts | 60-70 |
| outer main cap bolts | 35-40 |
| connecting rod bolts | 19-241) |
| cylinder head bolts | 65-72 |
| rocker arms | 17-23 |
| intake manifold bolts | 23-25 2) |
| oil pump bolt | 23-28 |
| cam bolts | 40-45 |
| cam thrust plate bolts | 8-10 |
| harmonic damper bolts | 70-90 |
| flywheel/flexplate bolts | 75-85 |
| pressure plate bolts | 20-223) |
| front cover bolts | 12-15 |
| Drive train | Torque |
| engine mount to engine block | 454) |
| engine mount to frame (nut) | 905) |
| transmission mount to T5 transmission | 556) |
| starter to bellhousing | 157) |
| transmission to aluminum bellhousing | 558) |
| mid-plate to aluminum bellhousing | 109) |
| aluminum bellhousing to engine | 4510) |
| driveshaft to center section | 70-95 |
| Independent front suspension (IFS) | Torque |
UCA to frame, 2 mounting bolts  42 | 100 |
| pivot adjustment on UCA, 3 bolts 42 | 4211) |
| ball joint into UCA mounting 42 | 70-9012) |
| ball joint into LCA mounting 42 | 80-12013) |
| spindle bracket to UCA, strut bolts 43 | 100-11014) |
| LCA to frame 44 | 11015) |
| spindle assembly to LCA on frame using Mustang crown nut 44 | 80-110 |
| Koni shock to LCA (bottom) | 60-7516) |
| Koni shock to frame (top) | 60-75 |
| Axle and wheel | Torque |
| hub lock nut, with anti-seize (front and rear) | 25017) |
| wheel lug nuts | 80-10518) |
| Independent rear suspension (IRS) | Torque |
| control arm and Koni shock nylock bolts (top and bottom) | 60-7519) |
| LCA to axle | 70-100 |
| LCA to frame | 80-105 |
| spindle attachment bolts 256 | 100 |
| Steering, controls | Torque |
| steering rack bolts | 30-40 |
| steering shaft pillow blocks | 20 |
| tie rod ends | 25-35 |
| pedal box (front plate) | 35 |
| pedal box (Frame down tube) | 10 |
| Exhaust | Torque |
| side pipe to header | 3520) |
| Accessories | Torque |
| roll bars using kit fasteners | 14 |
| windshield to chassis bracket | 90 |
| bumpers (quick jack or over-rider) | 60 |
| body mounting bolts (front, sides) | 20 |
