Rocker Arm Assembly: Service and Repair

Fig. 6 Rocker arm retainer removal. V6-231 & 252:

Fig. 7 Service rocker arm identification. V6-231 & 252:

Fig. 8 Service rocker arms installation. V6-231 & 252:

V6-231 & 252
A nylon retainer is used to retain the rocker arm. To remove them, break them below their heads with a chisel, or pry out with channel locks, Fig. 4. Production rocker arms can be installed in any sequence since the arms are identical.
Replacement rocker arms for all engines are identified with a stamping, right (R) and left (L), Fig. 5 and must be installed as shown in Fig. 6.
To install rocker arms, position arm on rocker shaft, centering it over the 1/4 inch hole in the rocker shaft. Install new rocker arm retainers in the provided holes using a 1/2 inch or larger drift to seat them.