Valves and Followers
| ITEM | DESCRIPTION |
|---|---|
| 1 | Cam follower |
| 2 | Valve collet |
| 3 | Valve spring retainer |
| 4 | Valve spring |
| 5 | Valve spring seat and valve stem oil seal |
| 6 | Valve |
The engine uses sixteen stainless steel valves; eight inlet and eight exhaust. The inlet valves are 35 mm diameter and the exhaust valves are 29.9 mm, The large valves allow for large cylinder head ports which contribute to increased engine power output and improved emissions. The valve stems are 5.4 mm which allows for reduced flow interruption through the inlet and exhaust ports, again improving power and emissions.
the valves are conventionally located in valve guide in the cylinder head. A valve seat with integral valve stem seal is located in the cylinder head. The valve spring is retained on the valve stem by a spring seat and split collets.
The valves are opened mechanically by a bucket design cam follower which is operated directly by the associated camshaft lobe. The valve clearance is set by selection of the appropriate cam follower to achieve the required clearance.