Detroit Diesel — Checking nozzle alignment
Testing & diagnosis · Oil spray nozzle
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Nozzle should NEVER contact ANY portion of the piston.
Procedure
- Install engine barring tool J-46392 or J-46167.
- Rotate crankshaft while inspecting nozzle.
- As piston reaches BDC check the alignment of the nozzle to the piston. The nozzle tip will enter the oil galley in the piston.
- Continue checking remaining cylinders.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Detroit Diesel 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.