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Torque specifications

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This article contains the recommended torque specifications for various critical bolts in the DeLorean.

Tightening Bolts Edit

Bolts should not just be tightened as hard as you can. The hollow banjo bolts on the fuel lines are fairly fragile, and will snap if over-tightened. The holes threaded into the aluminum engine block can easily be stripped by over-tightening, and even the steel threads in other parts of the car may be compromised by tightening with too much force. You shouldn't under-tighten the bolts either, as this may result in excess vibration of the joined parts and cause breakages or other failures to occur.

The DeLorean Workshop Manual includes various torque specifications, which were later updated by two service bulletins, ST-09-7/81 and ST-24-10/81, which can be found in the DeLorean Technical Manual. Both of these can be found online in the Service Bulletins section of the DMCNews website. The bulletins also include the thread sizes for the various bolts.

Warning About Torque Limits Edit

Torque specifications should not be exceeded. Doing so may compromise the threads and cause operational failure of the joint, most likely while under the strain of driving. Always use a properly adjusted and calibrated torque wrench when tightening bolts.

Chassis Thread Size NM Ft. Lb.
Fuel tank cover plate M8 x 13 22 16
Fuel tank front M6 x 10 11 8
Horn bracket attachment M6 x 10 11 8
Radiator mounting bracket to frame M8 x 13 22 16
Horn to bracket M6 x 10 11 8
Radiator stay bracket to frame M6 x 10 11 8
Rear Suspension Thread Size NM Ft. Lb.
Trailing arm bush attachment M8 x 13 22 16
Lower link both ends 1/2" x 19 80 60
Upper link both ends 1/2" x 19 80 60
Trailing arm hub to carrier M12 x 19 75 55
Outer drive shaft to hub M22 x 32 370 270
Trailing arm to pivot bush M12 x 19 75 55
Shaft to inner and outer drive shafts M10 x 17 40 30
Parking brake cable bracket to hub carrier M6 x 10 7 5.5
Caliper - hub carrier 7/16" x 20 55 40
Flex brake pipe attachment 3/8" x 15 16 12
Wheels M12 x 19 80 60
Transmission and Final Drive Thread Size NM Ft. Lb.
Drain and fill plugs M10 x 17 20 15
Mounts M8 x 13
M10 x 17
25
36
18
26
Transmission Shift Linkage Thread Size NM Ft. Lb.
Auto and manual relay pivot bolts M8 x 17 22v16
Front Suspension Thread Size NM Ft. Lb.
Caliper to mounting bracket M12 75 55
Dust shield M8 x 13 28 20
Front disc to hub
(w/Loctite 601)
M8 x 13 28 20
Stub axle to steering knuckle M22 x 32 220 165
Hub bearing to stub shaft M22 x 32 190 145
Upper control arm pivot bolt 1/2" x 19 80 60
Lower control arm pivot bolt 1/2" x 19 80 60
Shock absorber (upper) 3/8" x 14 28 20
Shock absorber (lower) 1/2" x 19 80 60
Stabilizer bar - lower control arm M12 x 19 75 55
Stabilizer bar pivot (on chassis) M10 x 17 36 26
Flex brake pipe attachment M10 x 15 16 12
Upper ball joint to steering knuckle 7/16" x 16 70 52
Lower ball joint to steering knuckle 1/2" x 19 70 52
Engine Thread Size NM Ft. Lb.
Engine Mounts M8 x 13 25 18
A/C compressor bracket to engine M7 x 13 16 12
Heat shields to exhaust crossover M6 x 10 11 8
Exhaust crossover pipe to manifold M10 x 17 40 30
'U' Bolt Catalyst to muffler M8 x 13 15 11
Muffler support bracket on engine M8 x 13
M10 x 17
22
30
16
22
Muffler rubber mounts M6 x 10 11 8
Brake Lines Thread Size NM Ft. Lb.
"T" connections to frame M6 x 10
M8 x 13
11
22
8
16
Flex pipe to frame M10 x 15 16 12
Line union through frame M10 x 15 16 12
Radiator Thread Size NM Ft. Lb.
Fan cowl to radiator M6 x 8
M6 x 10
7 5
Steering Units Thread Size NM Ft. Lb.
Lower column to universal joint to rack pinion and letter column M8 x 13 22 16
Tie rod to steering knuckle 7/16" x 14 36 26
Tie rod lock nut M12 x 19 65 48
Steering rack assembly to frame M8 x 13 15 11

See Also Edit

External Links Edit

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