Lincoln Navigator: Engine System - General Information / Piston Inspection. General Procedures

Lincoln Navigator 2018-2025 Workshop Manual / Engine / Engine System - General Information / Piston Inspection. General Procedures

Inspection

NOTE: Do not use a caustic cleaning solution or a wire brush to clean the pistons or damage can occur.
Clean and inspect the (1) ring lands, (2) pin bosses, (3) skirts and the (4) tops of the pistons. If wear marks, scores or glazing is found on the piston skirt, check for a bent or twisted connecting rod.

NOTE: Make sure the oil ring holes are clean.
Using a Piston Ring Groove Scraper, clean the piston ring grooves.

Piston Diameter. General Procedures

Check Measure the piston diameter 90 degrees from the piston pin and piston diameter (DN) height down from the top of the piston at the point indicated...

Piston Ring End Gap. General Procedures

Special Tool(s) / General Equipment Feeler Gauge Check NOTE: Refer to the appropriate Section 303-01 for the specification. NOTE: Use care when fitting piston rings to avoid possible damage to the piston ring or the cylinder bore...

Other information:

Lincoln Navigator 2018-2025 Workshop Manual: Inspection and Repair after a Supplemental Restraint System (SRS) Deployment. General Procedures

Inspection WARNING: If a vehicle has been in a crash, inspect the Restraints Control Module (RCM) and impact sensor mounting areas for any damage or deformation. Also inspect the related components for any cracks, damage, or loose fasteners...

Lincoln Navigator 2018-2025 Workshop Manual: Differential Control Module Rear (DCMR). Removal and Installation

Removal NOTE: Removal steps in this procedure may contain installation details. With the vehicle in NEUTRAL, position it on a hoist. Refer to: Jacking and Lifting (100-02 Jacking and Lifting, Description and Operation). Disconnect DCMR electrical connector by disengaging the side locking tab and pulling on the harness...

Diagnostic Methods. Description and Operation

This document provides critical diagnostic knowledge required for successful repair outcomes. It identifies technical competencies expected by users of this manual.

Ford Diagnostic Assumptions

Ford diagnostics assume the vehicle concern described by the test title is currently present. Exceptions to this rule are noted in each test. Do not replace modules or other components as directed by a diagnostic if the concern is not present at the time of testing.