Detroit Diesel — Fit Piston Rings
Adjustments · Piston and Piston Rings
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Do not permit chipping or peeling of the chrome plate on the ring.
Procedure
- Insert one ring at a time inside the cylinder liner, far enough down to be within the normal area of ring travel.
- Use a piston to push the ring down to be sure it is parallel with the top of the liner.
- Measure the ring gap with a feeler gage.
- If the gap on a compression ring is insufficient, increase it by filing or stoning the ends of the ring.
- File or stone both ends so the cutting action is from the outer surface to the inner surface.
- Check the ring side clearance.
Tools required
- Feeler gage Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Ring gap refer to Section 1.0
- Chamfer on the outer edge must have a .005" to .020" radius
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.