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Piston - Ring End Gap Mercury Sable IV

Engine System General Information 5 illustrations ~120 words

Piston - Ring End Gap

CAUTIONUse care when fitting piston rings to avoid possible damage to the piston ring or the cylinder bore.
CAUTIONPiston rings should not be transferred from one piston to another.

Note. Cylinder bore must be within specification for taper and out-of-round.

Scheme 944

Scheme 944
Scheme 944

Scheme 945

Scheme 945
Scheme 945
  1. Use a piston without rings to push a piston ring in a cylinder to the bottom of ring travel.
  2. Use a feeler gauge to measure the top piston ring end gap and the second piston ring end gap.

Scheme 946

Scheme 946: Piston - Ring-to-Groove Clearance
Scheme 946: Piston - Ring-to-Groove Clearance

Scheme 947

Scheme 947
Scheme 947
  1. Inspect the piston for ring land damage or accelerated wear.
  2. Measure the piston ring-to-groove clearance. If out of specification, install new components as necessary.

Scheme 948

Scheme 948: Piston - Pin Diameter
Scheme 948: Piston - Pin Diameter
  1. Measure the piston pin diameter in two directions at the points shown. Verify the diameter is within specification. If out of specification, install new components as necessary.