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Z31 Nut and Bolt List

Nut and Bolt Table

Location Size Pitch Thread Length
(Shoulder Length)		 More Details Years
Engine
Upper rear timing coverM61.010mm (none)Bolt + split washerAll
Distributor bracketM61.020mm (none)BoltAll
Distributor capM40.7525mm (none)BoltAll
Harmonic balancer to crankM101.0120mmBolt + flat washer84-87
Harmonic balancer to crankM121.25?Bolt + flat washer88-89
Pulleys to harmonic balancerM61.015mmBolt + split washerAll
Timing belt tensionerM101.25Nut + flat washerAll
CHTSM121.25All
Engine (Accessories)
Alternator bracket to blockM101.560mmBolt + split washer87-89
Alternator adjuster to blockM81.2525mm (40mm)Bolt + split + flat washerAll
Alternator to bracketM81.2520mmBoltAll
A/C bracket to blockM101.525mm (20mm)BoltAll
A/C bracket to blockM81.2525mm (90mm)BoltAll
Upper P/S pump bracketM81.2535mmBolt + split washerAll
Lower P/S pump bracketM101.520mmBolt + flat washer84-86
Front-right hoist bracketM81.2550mmBolt + split washerAll
Front-right hoist bracketM81.2516mmBolt + split washerAll
Motor mount bracket to blockM101.520mmBolt + split washerAll
Motor mount stabilizer to bracketM101.525mmBolt + split washerAll
Motor mount stabilizer to blockM101.520mmBolt + split washerAll
Engine (Cooling)
Filler neckM81.2550mm (?)Bolt + split + flat washerAll
T-stat housingM81.2572mm (?)Bolt + split + flat washerAll
T-stat housing coverM81.2534mmBolt + split + flat washerAll
Water pump pulleyM61.0Stud + split washer + nutAll
Filler neck to heater tube flangeM61.018mm (none)Bolt + split washerAll
Heater tube front+rear flangeM61.018mm (none)Bolt + split washerAll
Heater tube hold-downM61.014mm (none)Bolt + split washerAll
Engine (Lubrication)
Oil pumpM61.020mmBolt + split washerAll
M61.030mmBolt + split washerAll
Oil panM61.014mm (none)Bolt + split washerAll
Oil temp sensor bungM161.5All (turbo)
Oil sender port1/8"BSPTAll
Engine (Induction)
Fuel pressure regulatorM61.012mmBolt + split washerAll
Pop-off valve port1"NPTAll
EGR valve to intakeM81.25Stud + split washer + nutAll
Throttle body to plenumM81.2540mm (10mm)Bolt + split washerAll
Upper plenum to lowerM81.2540mm (10mm)Bolt + split washerAll
Injector retainerM61.030mm (none)BoltAll
Engine (Exhaust)
Exhaust manifoldM81.25Stud84-87
Exhaust manifoldM101.2530mmBolt88-89
Turbine to downpipeM101.5StudAll
Downpipe to exhaustM101.25StudAll
EGR manifold bungM221.5All
Transmission / Driveshaft
Transmission mount to bodyM101.520mmBoltAll
Transmission mount to isolatorM101.2520mm (90mm)BoltAll
Driveshaft to differentialM101.2530mmBoltAll (turbo)
Front Suspension
Tie rod endM141.5Castle nutAll
Steering rack to crossmemberM121.2530mmBoltAll
Knuckle to strutM121.2540mmBoltAll
Caliper to strutM121.2540mmBoltAll
Tension rod bracketM101.2525mmBoltAll
Tension rod studsM101.5Nut84-87
Tension rod studsM121.5Nut88-89
Rear Suspension
Shock to lower mountM121.25?BoltAll
M121.2540mm (80mm)Prev-torq nylock nutsAll
Shock upper mount to bodyM101.25Prev-torq nutsAll
Differential coverM81.2525mmBoltAll
Differential mount to bodyM101.560mmBoltAll
M121.25NutAll
Differential mount to bodyM101.560mmBoltAll
Differential to bracketM141.5/2.0StudAll
M141.5NutAll
Differential to crossmemberM121.2525mm (150mm)BoltAll
Body
Front bumper coverM61.0Prev-torq nutsAll
Rear bumper coverM51.0Prev-torq nutsAll
Interior
Seat bracketM101.525mmBoltAll
Miscellaneous
Acorn nutM121.2560° taper84-86
Lug nutM121.2560° taper87-89

Sources Used