Isuzu 4LE2 — Procedure for using the plastigauge (example: crank bearing to crank journal clearance)
Adjustments · Crank bearing / crank journal
For the Isuzu 4LE2, from the Isuzu service manual.
Applies to: Isuzu 4LE2, Isuzu 4LE2 engine
Before you start
- Do not rotate the crankshaft while using the plastigauge.
Procedure
- Clean the clamp face of the cylinder block and crankcase bearing, and also the bearing, and install the cylinder block to the crankcase.
- Gently rest the crankshaft on the cylinder block, and rotate it approximately 30 degrees to stabilize it.
- Cut the plastigauge to the same size as the journal width, and lay the gauge parallel to the journal avoiding the oil hole.
- Gently rest the crankcase on the cylinder block, apply molybdenum disulfide to the thread section and seating surface of the tightening bolt, and tighten in sequence to the correct torque.
- Gently remove the crankcase, and measure the crushed width of the plastigauge using the scale printed on the bag.
Tools required
- Plastigauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- PG-1 (Green) measurable range 0.025 - 0.076 mm {0.001 - 0.003 in}
- PR-1 (Red) measurable range 0.051 - 0.152 mm {0.002 - 0.006 in}
- PB-1 (Blue) measurable range 0.102 - 0.229 mm {0.004 - 0.009 in}
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.