ISUZU 4HK1 - what torque to tighten the head bolts?

Cylinder head repair in industrial and agricultural machinery engines involves replacing the head gasket and installing new head mounting bolts.
The use of new bolts and a new head gasket ensures an even pressure level of all bolts, thanks to which we obtain a perfect seal of the cylinder head

Cylinder head bolts must be tightened in accordance with specific tightening sequence and tightening torque rules.

In order to correctly mount the head in the ISUZU 4HK1 engine, we need:

- cylinder head gasket - 8981142560
- 18 bolts M14X115 - 8970776380
- bolt M10X43 - 8943995550
- bolt M10X73 - 8943995540 

You can buy all the necessary parts in our warehouse of parts for construction and agricultural machinery engines -
We recommend high-quality parts from the Japanese manufacturer - MAGURO:

Tighten the screws using a torque wrench in the order shown below:

1-18 - M14 bolts
19.20 - M10 bolts

Cylinder head bolt tightening torque for ISUZU 4HK1 engines:

M14 screws: - apply molybdenum disulfide to the threaded part and the mounting surface:
Stage 1: 98 N⋅m(10.0 kg⋅m/72 lb ft)
Stage 2: 147 N⋅m(15.0 kg⋅m/108 lb ft)
Stage 3: 30° - 60°

M10 screws: - apply engine oil to the threaded part and the mounting surface:
38 N⋅m(3.9 kg⋅m/28 lb ft)

A properly tightened cylinder head ensures optimum engine performance.

Before installation, all information should be confirmed in the service catalog dedicated to the given engine.

Categories: Service PARTS - wholesaler of Perkins CAT ISUZU Cummins engine parts

Leave a comment