Isuzu 4LE2 — Compression Pressure Measurement
Testing & diagnosis · Cylinder compression
For the Isuzu 4LE2, from the Isuzu service manual.
Applies to: Isuzu 4LE2, Isuzu 4LE2 engine
Procedure
- Operate engine to warm up until coolant temperature reaches 75°C (167°F).
- Remove all glow plugs and injection pipes.
- Attach compression gauge to No. 1 cylinder glow plug installation threads.
- Crank engine with starter motor and take compression gauge reading.
- Repeat for remaining cylinders.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Standard: 3 MPa (31/440 kgf/cm2/psi) at 250 min-1
- Limit: 2.5 MPa (26/370 kgf/cm2/psi)
- Variation exceeding 200 kPa (2.0 kg/cm2) is unacceptable
Full service-parts list: Isuzu 4LE2 →, Isuzu 4LE2 engine →
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.