Engine - Valve Rocker Arm Modified

REFERENCE ENGINE
NUMBER 046/TS168
DATE 11-19-82
MODEL RA63, 64, 65, RT135,
RN34, 38, 44, 48

Valve Rocker Arm:

Lock Nut:

The material of the valve rocker arm has been changed from cast iron to aluminum alloy with a cast in follower pad. At the same time, the adjusting screw has been lengthened and the design of the lock nut has been changed.

PRODUCTION EFFECTIVE:
Production Date

From Engine Number

22R-0280583 September 1981

From Frame Number

JT2RA64**C6007606
JT2RA64**C0000010
JT4RN34**C0027203
JT4RN38**C0024731
JT4RN44**C0053295
JT4RN48**C0028817
JT2RT3***C0029129
PART NUMBER INFORMATION:

Previous Part Number New Part Number Part Name

*13811-38010 13801-35010 Arm, valve rocker
*90913-05016 90913-05019 Screw, valve adjusting
*90170-08210 90179-08049 Nut hexagon
(for valve adjusting)

* These parts are interchangeable as a set.

Notes:

1. The new rocker arm set can be used with the previous rocker arms.

2. When reinstalling cylinder head cover, install new seal washers, and torque cover nuts to 45-50 in.lbs. Exceeding this torque will result in excessive valve train noise.