Valves And Roller Finger Cam Followers
| ITEM | DESCRIPTION |
|---|---|
| 1 | Hydraulic valve tappet (16 off) |
| 2 | Roller finger cam follower (16 off) |
| 3 | Valve spring collets (32 off) |
| 4 | Valve spring retainer (16 off) |
| 5 | Valve spring (16 off) |
| 6 | Valve spring seat (16 off) |
| 7 | Valves - 8 off intake, 8 off exhaust |
The engine uses sixteen chrome plated steel valves, eight intake and eight exhaust. The intake valves are 27.3mm diameter and the exhaust valves are 25.7mm diameter. The larger intake valve size will enhance more engine power output at higher Revolutions Per Minute (RPM). The intake valve stems are 5.47 mm diameter and exhaust valve stems are 5.463mm diameter. These allow reduced flow interruption through the intake and exhaust ports, improving performance and emissions.
The valves are located in conventional, non serviceable valve guides in the cylinder head. A valve stem seal with integral spring seat is located in the cylinder head. The valve spring is retained in a compressed state on the valve stem by a valve spring retainer and a pair of valve spring collets. The valves are opened mechanically by a roller finger cam follower design which is operated directly with roller to camshaft lobe rolling contact. The clearance between the roller and camshaft lobe is compensated with the use of a hydraulic valve tappet. This ensures that all roller finger cam followers are in contact with the camshaft lobes throughout engine operation.
The valves are located in conventional, non serviceable valve guides in the cylinder head. A valve stem seal with integral spring seat is located in the cylinder head. The valve spring is retained in a compressed state on the valve stem by a valve spring retainer and a pair of valve spring collets. The valves are opened mechanically by a roller finger cam follower design which is operated directly with roller to camshaft lobe rolling contact. The clearance between the roller and camshaft lobe is compensated with the use of a hydraulic valve tappet. This ensures that all roller finger cam followers are in contact with the camshaft lobes throughout engine operation.