DEFENDER
ENGINE
5.
With an inside micrometer or cylinder gauge
measure the diameter of the bore at
approximately half-way down and note the
reading.
9.
With the appropriate feeler gauge check all the
ring gaps in turn, including the oil control
rings.
The correct gaps are listed in the data section. If any
gap is less than that specified, remove the ring, and
file the e nds square, whilst holding the ring in a
filing jig or vice. Should any g ap b e excessively wide
and not likely to close up to within the specified
limits when hot, an oversize ring should be fitted.
Once the rings have been selected for a particular
cylinder and piston ensure that they are not again
mixed up.
6
. The clearance is determined by subtracting the
piston diameter from the bore diameter.
7.
If gauge equipment is not available the
clearance can be assessed by placing a long,
suitably sized, feeler gauge down the thrust
side of the bore and inserting the appropriate
piston, 'upside down', in the bore and position
it with the gudgeon pin parallel to the
Piston ring groove clearance
It is important that the groove clearances are
correct. Rings that are t oo tight may bind or
fracture when hot and cause loss of
crankshaft axis. Push the piston down the bore
and stop at the tightest point and whilst
holding the piston still, slowly withdraw the
feeler gauge. If a steady resistance of
compression. Excessive clearance allows t he
rings to rock in the groove and may result in a
pumping action and excessive oil
consumption.
approximately 2,5
(6
is felt, t he
clearance is satisfactory.
Piston ring gaps
8.
When checking t he piston ring gap in worn
bores which are within the acceptable taper
and ovality limits, the ring must be inserted
squarely into the bottom of the cylinder at the
lowest point of the piston travel. To ensure
squareness push the ring to the correct
position using a piston.
54
| Categories | Land Rover, Land Rover Defender 110, Land Rover Defender 130, Land Rover Defender 90 |
|---|---|
| Tags | Land Rover |
| Model Year | 1990 |
| Download File |
|
| Document Type | Workshop Manual |
| Language | English |
| Product Name | Defender 90, 110, 130 Td5, Tdi, V8 |
| 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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