Perkins 403F-11 — Bearing Clearance - Check
Testing & diagnosis · Connecting rod and main bearings
For the Perkins 403F-11, from the Perkins service manual.
Applies to: Perkins 403F-11
Before you start
- Lead wire, shim stock or a dial bore gauge can damage the bearing surfaces.
Procedure
- Put a piece of Plastigauge on the crown of the bearing that is in the cap.
- Do not allow Plastigauge to extend over the edge of the bearing.
- Install the bearing cap using correct torque-turn specifications; do not use an impact wrench.
- Do not turn the crankshaft when Plastigauge is installed.
- Carefully remove the cap without removing the Plastigauge.
- Measure the width of the Plastigauge.
- Remove all Plastigauge before installing the bearing cap.
Tools required
- Plastigauge (Green) Amazon
- Plastigauge (Red) Amazon
- Plastigauge (Blue) Amazon
- Plastigauge (Yellow) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Green 0.025 to 0.076 mm
- Red 0.051 to 0.152 mm
- Blue 0.102 to 0.229 mm
- Yellow 0.230 to 0.510 mm
Source: Perkins 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.