* Soak rockers, shafts, spacers, and locking devices in kerosene to disolve all preserve. Blow all oil pasasges with dry air. Then immerse rockers in engine oil for 30 minutes to ensure oil penetrates to bearings and roller shafts. .

* Tight pedestals on block with proper torque. Install rockers and shafts onto pedestals.

* For using longer valve stem, add shims under the pedestal to required height.

* Adjustment of valve lash.;The valve lash adjustment can obtain from either replace correct length of push rod or adjust height of push rod seat screw.

* Adjust valve lash by push rod seat screw.

Salck the nut and back the push rod seat screw all the way up.

For intake valve of hydraulic & mechnical Lifters:

Crank engine until exhaust push rod begins to open valve. Tight push rod seat screw at intake rocker until feel a slight resistance at the push rod by your finger tips spinning. Continue tight the seat screw half of a turn more for ideal pre-load.

For exhaust valve:same procedure as intake valve.

Tight secure nut on seat screw upon completion of adjustment.

* Adjust valve lash by using a correct length of push rod.

Back push rod seat screws all the way up. Tight nut and secure seat screw in place.

Take the adjustable push rod and placed into cup of push rod seat screw.

Turn and move the upper part of push rod upward until feel a resistance from onward movement. Turn push rod half of a turn more for proper pre-load. Take measurement of the total length of the adjustable push rod. This is an ideal length of push rod with pre-load.

Make same procedure for exhaust valve push rod length.

* Make sure to have a proper clearance for:

0.030" between rocker and spring retainer.

0.060" between reatiner and valve seal.

* Spray adequate lube on valve train system prior engine break-in.

* Hand crank engine to ensure all rockers run freely and the polylocks are not hitting on the up slot.

* Make sure the roller tips are properly sat on the center of valve top.

* Start the engine at low speed and make sure no knocking sound from cylinder head.

TECH SUPPORT
CAT POWER ENGINE PARTS, INC.