PRW 32-33 PQ Series Ford FE Shaft Mount Rocker Rev 1-9 - Manual (Page 3)

Step 13: Install the stud washers and nuts into place using PRW Moly lube (alternatively motor oil can be used if moly
lube is unavailable). Tighten the nuts evenly across the assembly while applying pressure against the valve springs. Once
the assembly is in place, torque the rocker stand nuts to 35 Lbs/Ft if using moly lube or 40-45 Lbs/Ft if using engine oil.
Step 14: If proper push rod length has already been determined install the pushrods into lifter bores, making certain that
each pushrod is properly seated in the corresponding lifter body. Apply assembly lube sparingly on both the push rod seat
and the ball adjuster. Now hand-turn the push rod adjuster insuring that the ball of the adjuster sits at the bottom of the
pushrod cup.
If pushrod length has not been verified, please refer to the Section: Pushrod Length; Checking to Determine Proper
Length to ascertain the appropriate pushrod lengths. Once completed, install the pushrods, and continue Step 15 as
detailed below.
Step 15: Set valve lash per camshaft manufacturer’s specification.
SPECIAL NOTES: Before running the engine, check for any interference between the rocker body and the pushrod.
Check for interference and resolve any contact between the rocker body and the valve spring or retainer at any point
during a cycle.
Prime the oil pump with an engine-priming tool and drill motor. Assure that oil is flowing through all valve train rocker
arms, stands, spacers, and shims.
Pushrod Length; Checking to Determine Proper Length
1. With the number 1 cylinder at TDC (Top Dead Center) seat the provided pushrod length checkers in both exhaust
and intake valve lifters.
a. The base circle may be different between the intake and exhaust camshaft profiles.
b. It is necessary to check both for proper individual pushrod length.
2. Begin with the valve lifter on camshaft base circle and valve lash adjuster rotated clockwise with 1 to 1 ½ threads
exposed from the base of the rocker body over the number one cylinder and with the pushrod length checkers in
place. Tighten and extend the valve lash adjuster accordingly until you achieve the desired rocker arm geometry
and pushrod alignment. You may wish to mark the checkers “I” and “E” (for intake and exhaust) to easily
identify after removal.
3. Install Rocker Arm System on the cylinder head, securing with the washers and 12 point pedestal flare nuts.
Tighten the stand until snug.
4. Adjust the pushrod length checkers to required fitment and proper length.
a. Loosen the valve lash adjuster in the rocker body and then remove the pushrod length checkers.
b. Record the lengths required for reference and order the appropriate quality Intake and Exhaust pushrods
from your Racing and Performance parts dealer.
NOTE: Maximum recommended spring pressures for the PQ 2
®
Shaft Mount Rocker Arm System is 275+ lbs for single
stands and 375+ lbs for double-end stands. The rocker arms will clear up to 1.550” diameter valve spring. Pushrods
selection is important; these are critical parts. High quality aftermarket 4130 chromoly steel pushrods are recommended.
Custom length pushrods are readily available from PRW through your local dealer.
Post Installation Maintenance:
1. The synchronized oil system must be inspected periodically for obstructions that may prevent proper rocker arm
oiling. After the valves have been adjusted to camshaft specifications, verify that each 12-pt adjuster nut has
retained 25 Lbs/Ft torque.
2. After 500 miles of operation, recheck mounting stud nut torque and recheck the valve lash and lifter preload.
NOTE: Severe engine damage may occur if the adjuster nut should come loose while the engine is operating.
Torque Specifications WITH Oil
3/8” Rocker Stand Studs 20 Lbs/In (Hand Tighten)
3/8” Rocker Stand Flare Nuts 40-45 Lbs/Ft
7/16” 12 point Adjuster Flare Nuts 22-25 Lbs/Ft