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Piston and connecting rod assembly (Discovery 3)

 
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        0  
Piston and connecting rod assembly


Item nameSpare part catalog numberDescription
1-Upper piston compression ring
2-Lower piston compression ring
3-Piston oil scraper rings
4-Piston
5-Piston pin
6-Connecting rod
7-Oil nozzle hole
8-Upper connecting rod bearing
9-Lower connecting rod bearing
10-Connecting rod cap
11-Screw
12-Bolt


Lightweight, thermally expanded aluminum alloy pistons with piston pins that float in the piston bosses are offset to the pressure side and are mounted on forged steel connecting rods. The pistons are classified into one of four classes - 1, 2, 3 or 4. The pistons are marked so that they are correctly oriented in the cylinders.; The "arrow" should point towards the front of the engine.

The V6 petrol engine uses forged steel I-beam connecting rods. The piston pin provides a fixed fit for the upper connecting rod head. The lower heads are horizontally divided.

Selected bearing shells with two thickness classes, nominal and reduced size 0.25 mm, control the diametrical clearance of the lower connecting rod heads. The upper and lower bearing shells of the lower heads have a simple shape without installation protrusions.



Each piston is equipped with two compression rings and an oil scraper ring. The upper compression ring has a nitrided surface, which is obtained by diffusing nitrogen into the surface layers of low-carbon steel. The resulting nitrides provide increased hardness. The second compression ring is chrome-plated. The oil scraper rings have upper and lower stainless steel guide elements and built-in expansion rings.

[The material was taken from the specified website: LRman.ru]


This article is available at russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian
Article review: Saveliy Ushakov


 

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Dimensions, clearances and correspondences of engine parts
Diagnostics and testing
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Cylinder Block Parts

Current article
Piston and connecting rod assembly

Next articles
Intermediate shaft assembly
Front cover and coolant pump assembly
Oil cooler (if equipped) and filter assembly
Knock and oil pressure sensors
Crankshaft, oil pan and oil pump parts
Crankshaft and main bearings
Balance shaft assembly
Crankshaft seals and oil pump

 
 

Similar articles from Land Rover repair manuals:
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• A connecting lever connected to the sector steering arm lever Defender 2007+ (2007-2016)

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Discovery 3 
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Discovery 1 
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