Isuzu 4HK1 / 6HK1 — Inspection of valve clearance
Maintenance · Valve train
For the Isuzu 4HK1 / 6HK1, from the Isuzu service manual.
Applies to: Isuzu 4HK1, Isuzu 6HK1
Before you start
- Adjust while being cold.
Procedure
- Remove the cylinder head cover.
- Remove the fuel injector harness ASM by loosening the terminal nuts alternately.
- Remove the leak off pipe.
- Rotate the crankshaft so No.1 cylinder is at compression TDC.
- Insert a 0.4 mm thickness gauge between rocker arm and bridge to check clearance.
Tools required
- 0.4 mm thickness gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Valve clearance 0.4 mm (0.016) intake and exhaust (cold)
Full service-parts list: Isuzu 4HK1 →, Isuzu 6HK1 →
Source: Isuzu service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.