STC1122 | Exhaust Valve 3.5 V8 Twin Carb | Defender, Discovery 1, Range Rover Classic
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: STC1122 - Exhaust Valve - Cylinder Head - 3.5 V8
STC1122 is an exhaust valve for the cylinder head on 3.5 V8 engines. Fitted to the cylinder head, this valve controls the release of exhaust gases from the combustion chamber during the exhaust stroke; the valve face seals against the valve seat when closed and lifts under camshaft actuation to create the exhaust path. Valves in 3.5 V8 engines are exposed to high temperature and pressure, so correct seating, valve-guide condition and matching with the valve seat are important when replacing this item. Where multiple valves are worn, valve refacing or seat work may be required to restore correct sealing and combustion performance. This part is intended for the 3.5 V8 Twin Carb and related cylinder head assemblies fitted to the models listed below.
Use the compatibility data below to confirm fitment against your V.I.N.
Compatibility
- Defender (1987-2006) - 3.5 Twin Carb V8 (To VIN LA921745)
- Discovery 1 - 3.5 Twin Carb V8 (To VIN JA040523)
- Range Rover Classic (1986-1991) - 3.5 V8 Pi Auto
Frequently Asked Questions
STC1122 is the exhaust valve that controls the release of burnt gases from the combustion chamber on 3.5 V8 engines. The valve seals against the seat when closed and lifts under camshaft action to provide the exhaust path during the exhaust stroke. Because these valves run at high temperature and pressure, correct seating, valve-guide condition and matching with the valve seat are critical; if several valves are worn, valve refacing or seat work may be required to restore proper sealing and combustion performance.
| Model | Variant |
|---|---|
| Land Rover Defender (1987-2006) | 3.5L V8 Twin Carb Petrol (To VIN LA921745) |
| Land Rover Discovery 1 | 3.5 Twin Carb V8 (To VIN JA040523) |
| Land Rover Range Rover Classic (1986-1991) | Petrol V8 L/R EFI (To VIN HA610293) |
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.
- 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.