FB506115 | Flange-Headed Bolt 3/8 X 1-3/8 - V8 & Gearbox | Defender, Range Rover
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: FB506115 - Flange-Headed Bolt 3/8 UNC X 1-3/8
FB506115 is a flange-headed bolt, 3/8 UNC x 1-3/8 in length. Fitted where the inlet manifold or gearbox bell housing requires a flange-bearing fastener, this bolt secures selected V8 engine inlet manifolds and gearbox bell housings to the mating components.
Compatibility
- Defender (1987-2006) - 4.0 V8 EFI
- Discovery 1 (1989-1998) - 3.9/4.0 V8 EFI (From VIN FA393361 to WA799999)
- Discovery 2 (1998-2004) - R380 5-speed manual; ZF 4-speed automatic
- Range Rover P38 (1994-2001) - 4.0 V8 EFI; 4.6 V8 EFI
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.
Frequently Asked Questions
FB506115 secures inlet manifolds and gearbox bell housings on selected V8 engines and transmissions, providing a flange-bearing surface to distribute clamping load. When fitting, ensure correct thread engagement and avoid cross-threading; inspect the bolt and mating threads for damage or corrosion and replace if found.
| Model | Variant |
|---|---|
| Land Rover Defender (1987-2006) | Inlet Manifold - 4.0L V8 EFI |
| Land Rover Discovery 1 (1989-1998) | Inlet Manifold - 3.9/4.0 V8 EFI (From VIN FA393361 to WA799999) |
| Land Rover Discovery 2 (1998-2004) | Bell Housing - 5-speed manual transmission |
| Land Rover Discovery 2 (1998-2004) | Converter, Bell Housing and Oil Pump - Automatic transmission |
| Land Rover Range Rover P38 (1994-2001) | Inlet Manifold - 4.0L V8 EFI; 4.6L V8 EFI |
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.
Inspect the bolt during any inlet manifold or gearbox service and replace it if it is corroded, bent, or the threads are damaged. If there is any doubt, follow the vehicle workshop manual or consult a qualified technician.
- L8 products are genuine Land Rover parts.
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