Ford LSG 875 — Fitting Piston Rings
Repair & overhaul · Pistons and rings
For the Ford LSG 875, from the Ford service manual.
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Before you start
- Rings should not be transferred from one piston to another regardless of mileage or hours
Procedure
- Select the proper ring set for the size cylinder bore.
- Position the ring in the cylinder bore in which it will be used.
- Push the ring down into the bore area where normal ring wear is not encountered.
- Use the head of a piston to square the ring with the cylinder wall.
- Measure the gap between the ends of the ring with a feeler gauge; try another ring set if not within limits.
- Check ring side clearance of compression rings with a feeler gauge; replace the piston if lower lands have high steps.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Top compression ring gap width 0.010-0 FridayParts $69.58.020 inch
- Ring side clearance 0.0025-0.0045 inch
Source: Ford 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.