Defender. Manual — part 70
Connecting Rods and Pistons
Item
Part Number
Description
1
-
Circlip
2
-
Piston pin
3
-
Connecting rod
4
-
Connecting rod bearing
5
-
Projection
6
-
Bearing cap
7
-
Retaining bolts
8
-
Identification
9
-
Bearing shell
The connecting rods are manufactured from sinter-forged steel. The selective connecting rod bearings are aluminum/tin
split plain bearings. The connecting rod bearing is 'sputter coated', which is a manufacturing process that layers the
bearing material to produce a higher load capacity for improved durability.
The connecting rods are available in 3 different lengths. For identification, the connecting rod and bearing cap are
marked with the corresponding identification code.
Item
Part Number
Description
A
-
Front of the engine
1
-
Upper compression ring
2
-
Lower compression ring
3
-
Oil control ring
The pistons are made from aluminum alloy and are fitted with three rings. The piston crown incorporates a pronounced
bowl; this forms the combustion chamber, which promotes swirl and turbulence necessary for good combustion and
improved emissions. In addition, the piston also incorporates oil cooling galleries within the piston crown to enhance
piston cooling (see piston cooling jets section for more information).
When installing pistons ensure the arrows on the piston crowns all point to the front of the engine.
Each piston is installed on a wrist pin located in an aluminum/tin bushing in the connecting rod.
Rear Oil Seal Retainer
Item
Part Number
Description
1
-
Rear oil seal retainer
2
-
Rear oil seal
3
-
Bolt (8 off)
The crankshaft rear oil seal retainer is attached to the rear of the cylinder block by 8 bolts and is sealed with a rubber
seal.
Crankshaft Position (CKP) Sensor
Item
Part Number
Description
1
-
CKP mounting bracket
2
-
CKP sensor
3
-
Trigger wheel (reluctor)
4
-
Flywheel
The CKP sensor is located on the cylinder block and transmission flange. The sensor provides an input of engine
crankshaft speed and position. The sensor works on the Hall effect principle and scans a trigger wheel on the back of
the flywheel. If the CKP sensor bracket has been removed it is important it is aligned correctly when fitting.
For additional information, refer to:
Electronic Engine Controls
(303-14 Electronic Engine Controls - 2.4L Duratorq-TDCi
HPCR (103kW/140PS) - Puma, Description and Operation).
Starter Motor
The engine starter motor is installed at the rear Left Hand (LH) side of the cylinder block, on the transmission flange.
For additional information, refer to:
Starting System
(303-06 Starting System - 2.4L Duratorq-TDCi HPCR
(103kW/140PS) - Puma, Description and Operation).
Generator
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