Valve: Specifications

Valve arrangement (front to rear) LH-I-E-I-E-I-E (RH-E-I-E-I-E-I)
Valve guide bore diameter mm (inch) 7.00-7.018 (0.276)
Valve stem diameter intake mm (inch) 6.965-6.98 (0.274-0.275)
Valve stem diameter exhaust mm (inch) 6.95-6.965 (0.274)
Valve stem-to-guide clearance exhaust mm (inch) 0.035-0.068 (0.001-0.003)
Valve stem-to-guide clearance intake mm (inch) 0.020-0.053 (0.001-0.002)
Valve head diameter intake mm (inch) 45.9-46.1 (1.807-1.815)
Valve head diameter exhaust mm (inch) 38.9-39.1 (1.531 - 1.539)
Valve face runout 0.03 (0.001)
Valve face angle (degrees) 45 degrees
Valve seat width (exhaust and intake) mm (inch)
1.556-2.404 (0.06-0.094) 1.273-2.121 (0.05-0.083)
Valve seat runout (TIR maximum) mm (inch) 0.059 (0.002)
Valve seat angle (degrees) 45 degrees
Valve spring free length intake mm (inch) 43.1 (1.7)
Valve spring free length exhaust mm (inch) 43.1 (1.7)
Valve spring squareness TBD
Valve spring compression pressure intake at (specified height) (lb)
275-305 Nm at 35.9-36.7 mm (202.84-224.968 ft. lbs. at 1.413-1.445 inch)
Valve spring compression pressure exhaust (at specified height) (lb)
275-305 Nm at 35.9-36.7 mm (202.84-224.968 ft. lbs. at 1.413-1.445 inch)
Valve spring installed height intake mm (inch) 39.86-40.86 (1.569-1.601)
Valve spring installed height exhaust mm (inch) 39.86-40.68 (1.569-1.601)
Valve spring installed pressure TBD
Roller follower ratio TBD