code: PSTNRGST3
( £371.70 inc. VAT)
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3 Piston Ring Set 4mm oil ring
  • All V8 engines from chassis number 08742 with 8:1 or 7:1 compression pistons
  • All V8 engines from chassis number 22118 and onwards

This set of piston rings is from the engine section in the Rolls-Royce & Bentley parts catalogue for models built between 1965 to 1980.

To maintain or improve the performance of your car, working piston liners and ring are just as important as the fuel you use to power your engine. Piston liners and rings sit inside the cylinders of your main engine block. They prevent harmful gases from escaping the combustion chamber. They also help control the temperature of your engine. Manufacturers use piston liners to form a space that allows each piston to move up and down. The liner is subject to constant force, as well as exposure to high temperatures (over 2000 °C). As a result, the liner will degrade over. It is possible to replace worn piston liners on some (but not all) engines. You should therefore check that this is possible on your vehicle before making a purchase.

Symptoms of worn piston liners are overheating, stalling and issues starting your car. However, the last two symptoms could also mean that the pistons themselves are worn and may need replacing. Piston rings are usually sold in packets of three. These rings form an airtight seal between the engine piston and the liner. While small in size, each piston ring plays an essential part in keeping oil out of the engine cylinders, even at high pressure. Each piston ring also helps to contain fuel and allows the combustion process to work its magic. Due to these extreme conditions, piston rings will wear over time. Signs of worn piston rings include white or grey exhaust smoke, and excessive oil consumption.

About Prestige Parts Piston Rings:

Quality control is a significant factor in the manufacture of highly stressed components such as piston rings and the rings are manufactured under an ISO/TS16949 quality management systems using modern in-process techniques such as poka-yoke (manufacturing techniques to error-proof the finished component). The latest optical and laser technologies with tangential tension testing ensure every ring produced meets our exacting standards of material and dimensional accuracy.

Tighter dimensional tolerances, better surface finish, smaller draft angles, and near net shape castings are produced from the on-site grey and ductile iron foundry reducing machining therefore producing a cost effective but high quality ring. Coatings chosen to suit each ring and application provide the correct level of wear resistance, anti-scuffing, low friction and rust prevention as appropriate.

All our parts branded Prestige Parts have a 3 year warranty.

Return postage must be paid by the customer and proof of delivery retained. IntroCar Ltd cannot be held responsible for the non-delivery of items being returned to the Company. When returning items wrongly supplied or under warranty, postage will be refunded up to a reasonable level (maximum return postage is limited up to the value of a return collection). If in doubt please contact us to confirm if return collection can be arranged.

Please refer to our Conditions of Sale for full details of return and exchange policy.

Please note that Special Order items will not be accepted as returns. These are items which have been ordered to specification, or those ordered from Bentley Motors Limited or Roll-Royce Motorcars Limited. Please contact us if in any doubt as to whether your item is viable for return.

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Bentley Graphic Founded in 1989