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Isuzu A-4JA1 and A-4JB1 , Bolt Tightening Torques

 

Isuzu A-4JA1 and A-4JB1
Connecting Rod Nut

57.9 - 65.1 lb.ft, 78.4 - 88.2 Nm

Isuzu A-4JA1 and A-4JB1
Main Bearing Bolt

115.7 - 130.2 lb.ft, 156.9 - 176.5 Nm

Isuzu A-4JA1 and A-4JB1
Cylinder Head Bolt

New Bolt
Step 1 = 21.7 - 36.1 lb.ft, 29.4 - 49.0 Nm
Step 2 = 59.4 - 66.5 lb.ft, 80.4 - 90.2 Nm

Reused Bolt
Step 1 = 57.9 - 65.1 lb.ft, 78.4 - 88.2 Nm
Step 2 = 72.4 - 79.6 lb.ft, 98.1 - 107.9 Nm




Isuzu 4JB1 Engine Specifications

 

Isuzu 4JB1
Displacement, bore, stroke, compression ratio


Bore
3.7 inches 93 mm

Stroke
4.0 inches 102 mm

Displacement
169 CID, 2.8 liter

Compression Ratio
18.2:1

Isuzu 4J
Weight


Dry Weight
A-4JA1
480 lb, 218 kg

A-4JB1
486 lb, 220 kg

A-4JB1T
540 lb, 245 kg

4JB1
552 lb, 250 kg


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