ENGINE
Piston rings - inspection
Pistons- remove
1.
Temporarily fit new compression rings to
piston.
NOTE: If replacement pistons are to be
fitted, ensure rings are correct for piston.
The 2nd compression ring marked ’TOP’ must be
fitted, with marking uppermost, into second
groove. The 1st compression ring fits into top
groove and can be fitted either way round.
1.
2.
Clamp hexagon body of LRT-12-013 in vice.
Screw large nut back until flush with end of
centre screw.
3.
4.
Push centre screw forward until nut contacts
thrust race.
Locate remover/replacer adapter
LRT-12-126/2 with its long spigot inside bore
of hexagon body.
5.
Position remover/replacer adapter
LRT-12-126/3 on LRT-12-126/2 with cut-out
facing away from body of LRT-12-013 .
Locate piston and connecting rod assembly on
centre screw and up to adapter LRT-12-126/2.
Position cut-out of adapter LRT-12-126/3 to
piston.
2.
Check compression ring to groove clearance:
1st 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
to 0.004 in).
6.
7.
(0.002
CAUTION: Ensure cut-out does not
contact gudgeon pin.
8.
Fit remover/replacer bush LRT-12-126/1 on
centre screw with flanged end away from
gudgeon pin. Screw stop nut on to centre
screw.
9.
10.
Lock the stop nut securely with lockscrew.
Push connecting rod to right to locate end of
gudgeon pin in adapter LRT-12-126/2.
Screw large nut up to LRT-12-013 .
Hold lockscrew and turn large nut until
gudgeon pin is withdrawn from piston.
Dismantle tool and remove piston, connecting
rod and gudgeon pin.
3.
Insert piston ring into its relevant cylinder bore,
held square to bore with piston and check ring
gaps.
11.
12.
1st compression ring = 0.3 to 0.5 mm (0.01 to
0.02
in)
13.
14.
2nd compression ring = 0.40 to 0.65 mm
(0.016
to 0.03 in)
Oil control ring rails = 0.38 to 1.40 mm (0.014
to 0.05 in)
NOTE: Keep each piston and gudgeon pin
with their respective connecting rod.
4.
Retain rings with their respective pistons.
Repeat above operation for remaining pistons.
28
OVERHAUL
| Categories | Land Rover, Land Rover Defender, Range Rover |
|---|---|
| Tags | Land Rover |
| Model Year | 1999 |
| Download File |
|
| Product Name | Range Rover 4.0 & 4.6 Litre, Defender V8i |
| Product Brand | Land Rover |
| Document File Type | |
| Publisher | landrover.com |
| Wikipedia's Page | http://en.wikipedia.org/wiki/Land_Rover |
| Copyright | Attribution Non-commercial |
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