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Michael Bishop:
The first Land-Rover engine is the 1595cc 4-cylinder
version of Rover's inlet over exhaust,
then a very new engine layout.
The basic specifications of the engine are as follows.
Bore................. 69.5 mm
Stroke...............105 mm
Capacity............1595 cc
Compression Ratio....6.8:1
B.H.P........50-55 @ 4000 rpm
Torque.......80lb./ft @ 2000 rpm
1948/49 model Land Rover Engine changes
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861872
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Some minor parts on the carburettor changed. The accelerator
pump changed
from having the long pump arm, to having
a short pump arm. The throttle lever
changed as well as the accelerator
pump actuating rod. The main jet changed from
being 102.5 to being 107.5. Original
carburettors are easy to distinguish. They are
date stamped on the carburettor main
body. The series all start with L. They then
have another single letter being from
A to L excluding I. This means the month,
A, being January and so on. Then the
year is stamped 48, 49 and so on.
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862234
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The Lucas starter motor changed from being the M418
G/C type to being the
M418 G/76 type. The details of the
starter motor are stamped on the main
starter body. These are date stamped
in the fashion 3 49 meaning March 1949
and so on. The main difference between
the two starters is that an adaptor plate
was dropped from the back.
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865550
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A rubber sealing strip has been added to the rear
of the sump. The early sealing of
sump was sometimes found to be inadequate
in extreme conditions.
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867432
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The nuts holding the main bearing caps to the engine
block changed from being
with self locking nuts to being held
with castle nuts and split pins. The studs now
have holes for the split pins to go
through.
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867641
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The top engine rocker cover changed from having inset
studs holding to the
cylinder head to having raised points
for the studs to hold the rocker cover
to the cylinder head.
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1950 model Land Rover engine changes
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06100201
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The clutch changed from being the Rover type to the
Borg and Beck type. The
Rover type clutch is held to the flywheel
with eight nuts and the Borg and Beck
type is held to the flywheel with six
nuts, hence the flywheel is also different.
See also gearbox No. 06100201 in the
Gearbox part changes
section.
The clutch changed again on the 1953 model
at engine No. 36100885.
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06106532
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The rear bolt for the dynamo changed from being 5/16
x 1.5" long to being
5/16 x 1 19/32" long.
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06106720
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The rubber inlet valve seal changed from being in
the valve spring cup part No.
210517 to being in the valve guide
part No. 233427. The valve guide changed
as well to suit the new seal from part
No. 217870 to part No. 233643.
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06111606
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The three long bolts holding the thermostat housing
to the cylinder head are
changed from being the special type
which can hold the engine governor, part
No. 232955 to being three normal bolts
5/16 x 11/16" long
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06112001
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The oil filter inlet and out let pipes changed. I
think that they were
lengthened a little so that it would
make the oil filter easier to remove. The fan
pulley was changed from being the type
with two grooves, one for the fan belt and
the other for the engine governor drive
belt, part No. 218563, to being the type with
one groove, part No. 230492 except when
an engine governor is fitted and then two
belt pulley is used.
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06115161
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The thermostat housing changed from being the type
with two plugs on the
left hand side, one for the heater
pipe and the other for the temperature gauge
sender, part No. 212379 to being the
type with no extra plugs, part No. 233483.
If you wish to fit a heater or a temperature
gauge then you need to get one of the
thermostat housings with the two plugs.
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1951 model Land Rover engine changes
16100646
16130655
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The oil supply pipe to the cylinder head is changed
from being the type with
removable oil pressure switch junction, part No. 212360,
to being the type with the
built in oil pressure switch junction,
part No. 233522.
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16101154
16130774
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The locating bolt for the distributor that bolts
in the side of the distributor housing
is no longer fitted. The casting space for it is
left in the distributor housing for a while after.
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16102272
16131649
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The sump changed from being the square type, part
No. 231481, to being the
curved type of sump part No. 233444. The oil pump changed
from being the type
with the removable round gauze filter,
part No. 214989 to being the type with the
dish shaped filter inside the sump,
part No. 234310. The oil pump drive shaft, part
No. 09053 was shortened to suit the
new shorter curved sump oil pump. It is now
part No. 234288. The dipstick changed
to suit the new sump. The dipstick changed
again at engine No. 26100201. The oil
pump drive shaft changed again on the 1951
model at engine No. 16105728.
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16102348
16131725
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The top rocker cover breather changed from being
the rounded adjustable type,
part No.'s 213887 to 213890, to being the single hexagonal
shaped type, part No. 234613.
The top rocker cover breather
changed on the 1952 model at engine No. 26100201.
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16102462
16131765
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The piston scraper rings changed from having two
of the same ring per piston, to
having a stepped scraper ring and a maxilite scraper
ring. The pistons also
changed to having two horizontal grooves
in each side of the piston.
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16105728
16134269
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The oil pump/ distributor drive changed from being
a one piece shaft, part No. 234288,
with the distributor drive dog held on by
a locating pin, to being a two
piece shaft. The longer oil pump shaft
is part No. 235083, and the shorter distributor
drive shaft is part No. 233681.
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1952 and 1953 model Land Rover engine changes
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26100001
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The engine is now the 2-litre engine as of the 1952
model. This is the Siamese
bore type engine. The basic engine
specification that changed are
Bore.................77.8 mm
Capacity.............1997cc
Compression Ratio....6.8:1
Torque.....101 lb./ft @ 1500 rpm
Most of the other engine parts in the early 2-litre
engines apart from the block
and the pistons are the same as the
previous 1.6-litre Land Rover engine.
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26100201
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The top rocker cover changed from having the hexagonal
shaped breather on the
far end, part No. 234613 to having the
large dome shaped breather extruding out the
front of the top rocker cover. The
side rocker cover, part No. 216680 is changed
from having the bolt on alloy oil filler,
part No. 218799 to having an oil filler which is
integral with the side cover, part
No. 236003. The oil filler lid is a domed breather
for the crank casing similar to the
new top rocker cover breather. The previous
crank case breather par No. 232454 which
is on the right hand side of the engine
block is no longer fitted. The pipe
from the air filter to the carburettor are changed
from the type with the extra holes
in them for the early breather system, to being
the type with no extra holes. The dipstick
changes from the heavy short type, part
No. 233460, to being the long skinny
wire style dipstick part No. 237563.
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26110172
26138074
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The oil pressure switch changed somehow. It was
part No. 217644 and is now part
No. 240526
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36100885
36130877
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The clutch plate changed somehow. It isn't clear
how it changed. The lining is still
the same so presumably the clutch plate springs were
changed.
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