Remove the yoke retainer and aligning yokes (Fig. 73).
Remove the hydraulic lifters. If necessary use Special Tool C-4129, or equivalent to remove lifters from bores. If lifters are to be reused, identify each lifter to ensure installation in original location.
Lubricate the lifters with engine oil.
NOTE: Position the lifter in bore with the lubrication hole facing upward (Fig. 72).
Install the hydraulic lifters with the lubrication hole facing upward towards middle of block (Fig. 72). Install lifters in original positions, if reused.
Install lifter aligning yokes (Fig. 73).
Install yoke retainer and torque screws to 12 Nm (105 in. Lbs.) (Fig. 73).
Install the cylinder heads.
Start and operate engine. Warm up to normal operating temperature.
CAUTION: To prevent damage to valve mechanism, engine must not be run above fast idle until all hydraulic lifters have filled with oil and have become quiet.