LR3/Disco 3
position is etched on adjoining sides of the joint to identify matching connecting rods and bearing caps. The selective
connecting rod bearings are aluminium/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.
NOTE :
Connecting Rod Installation
When installing a connecting rod, ensure the back of the connecting rod faces the centre of the 'vee'.
The pistons are made from aluminium 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 skirt has a molybdenum-coated surface, which counteracts scoring of the
cylinder bore and piston.
The piston also incorporates a double wave gallery within the piston crown to enhance piston cooling. The pistons are
supplied oil by means of spray jets located in the cylinder block oil gallery. These jets ensure optimum piston cooling to
counteract the high temperatures generated by the combustion process.
Each piston is installed on a wrist pin located in a aluminium/tin bushing in the connecting rod.
Piston Installation
The connecting rods are not selective.
Item Part Number
Description
1
-
Piston and connecting rod assembly, cylinders 4-6
2
-
Piston and connecting rod assembly, cylinders 1-3
3
-
Bolts
4
-
Connecting rod bearing cap
5
-
Connecting rod lower bearing
