Defender 110 (LD) V8-3.9L (1993)
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2. Check compression ring to groove clearance:
Top compression ring A = 0.05 to 0.10 mm (0.002 to 0.004 in)
2nd compression ring B = 0.05 to 0.10 mm (0.002 to 0.004 in)
3. Insert piston ring into its relevant cylinder bore, held square to bore with piston and check ring gaps.
Top compression ring = 0.44 to 0.57 mm (0.02 to 0.22 in)
2nd compression ring = 0.44 to 0.57 mm(0.02 to 0.22 in)
Oil control ring rails = 0.38 to 1.40 mm (0.14 to 0.05 in)
Pistons - remove
1. Clamp hexagon body of LRT-12-013 in vice.
2. Screw large nut back until flush with end of centre screw.
3. Push centre screw forward until nut contacts thrust race.
4. Locate piston adapter LRT-12-014 with its long spigot inside bore of hexagon body.
5. Locate piston and connecting rod assembly on centre screw and up to adapter LRT-12-014.
6. Fit remover/replacer bush of LRT-12-014 on centre screw with flanged end away from gudgeon pin.
7. Screw stop nut on to centre screw.
8. Lock the stop nut securely with lockscrew.
9. Push connecting rod to right to locate end of gudgeon pin in adapter LRT-12-014.
10. Ensure remover/replacer is located in gudgeon pin bore of piston.
11. Screw large nut up to LRT-12-013.
12. Hold lockscrew and turn large nut until gudgeon pin is withdrawn from piston.
13. Dismantle tool and remove piston, connecting rod and gudgeon pin.
NOTE: Keep each piston and gudgeon pin with their respective connecting rod.
14. Repeat above operation for remaining pistons.
Pistons and connecting rods - inspection
1. Clean carbon from pistons.
2. Inspect pistons for distortion and cracks.
3. Measure piston diameter at 90 ° to gudgeon pin axis and 10 mm (0.4 in) from bottom of skirt. The piston must be 0.02 mm to 0.045 mm (0.001 to
