RTC478310 | Main Bearing Kit - 200Tdi & 300Tdi | Defender, Discovery 1
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
Land Rover Part Number: RTC478310 - Main Bearing Kit - 0.010in Undersize
RTC478310 is a Main Bearing Kit - 0.010in undersize for 2.5L 4-cylinder Land Rover engines up to 300Tdi. The kit contains the crankshaft main bearing shells which form the bearing surfaces between the crankshaft journals and the engine block, supporting crankshaft rotation on an oil film. It supplies the full set of main positions used on five-bearing 2.5L crankshafts and is intended for use when crankshaft journals have been machined or reground to a 0.010in undersize during an engine rebuild or overhaul.
Use the compatibility data below to confirm fitment against your V.I.N.
Compatibility
- Defender (1987-2006) - 2.5L 4-cylinder petrol, 2.5L naturally aspirated diesel, 2.5L turbo diesel, 200Tdi, 300Tdi
- Discovery 1 (1989-1998) - 200Tdi, 300Tdi - From VIN FA393361 to WA799999
- Range Rover Classic (1992-1994) - 200Tdi, 300Tdi - From VIN JA610294
Frequently Asked Questions
RTC478310 supplies undersize crankshaft main bearing shells for 2.5L four-cylinder engines reground to a 0.010in undersize. The shells locate and support the crankshaft axially and radially, carrying oil to maintain the lubricating film and reduce metal-to-metal contact. This kit covers the full five main positions used on typical 2.5L crankshafts and is fitted during bottom-end rebuilds where journal undersize is present.
| Model | Variant |
|---|---|
| Land Rover Defender (1987-2006) | 2.5L 4-cylinder petrol |
| Land Rover Defender (1987-2006) | 2.5L naturally aspirated diesel |
| Land Rover Defender (1987-2006) | 2.5L turbo diesel |
| Land Rover Defender (1987-2006) | 2.5L 200 Tdi (5-speed manual, less catalyst) |
| Land Rover Defender (1987-2006) | 2.5L 300 Tdi Diesel Turbo |
| Land Rover Discovery 1 (1989-1998) | 2.5L 200 Tdi - From VIN FA393361 to WA799999 |
| Land Rover Discovery 1 (1989-1998) | 2.5L 300 Tdi - From VIN FA393361 to WA799999 |
| Land Rover Range Rover Classic (1992-1994) | 2.5L 200 Tdi - From VIN JA610294 |
| Land Rover Range Rover Classic (1992-1994) | 2.5L 300 Tdi - From VIN JA610294 |
If you are unsure of compatibility with your vehicle, you can also confirm by checking against your V.I.N. Simply reach out to us with your V.I.N and desired part number via our Contact page or use our Finding Part Numbers page.
Replace this kit during an engine rebuild or overhaul when the crankshaft journals have been machined or reground to a 0.010in undersize; fitting the correct undersize shells restores bearing clearance. If unsure, consult the workshop manual or a qualified engine machinist.
- C8 products are usually supplied by Britpart.
- L8 products are genuine Land Rover parts.
- Z8 products are normally supplied by Allmakes.
All products and accessories available on LRDirect.com come with a 2-year warranty.