PRW 33 PQ Series Aluminum SB Chevy Shaft Mount Rocker - Manual (Page 4)

Section ii – special instructions
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. With the valve lifter on camshaft base circle and valve lash adjuster rotated clockwise 1 turn out
from the seated position, install the rocker pair over the number one cylinder with the length
checkers in place. You may wish to mark the checkers “I” and “E” (for intake and exhaust) to
easily identify after removal.
3. Tighten the torx machine screws through the shaft and into the stand until snug.
a. Do not attempt to install or remove rocker arms under load.
b. To do so will likely result in serious damage to the rocker arm shaft, bearings, and/or the
rocker body.
4. Adjust the pushrod length checkers to required fitment and proper length.
a. Remove the rocker pair from the stand 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 closed; and 700 lbs open. 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:
The synchronized oil system must be inspected periodically for obstructions that may prevent proper
rocker arm oiling. After the valve has been adjusted to camshaft specifications, verify that the 12 pt
adjuster nut has retained 140-150 lbs/inch torque.
NOTE: Severe engine damage may occur if the adjuster nut should come loose while the engine is
operating.
Limited Warranty
Performance Quotient and PRW Industries, Inc. (“PRW”) warrants that all of its products are free from
defects in material and workmanship, and against excessive wear for a period of (1) one year from the
date of purchase. This limited warranty shall cover the original purchaser.
PRW’s obligation under this warranty is limited to the repair or replacement of its product. To
make a warranty claim, the part must be returned within (1) one year of purchase to the address listed
below, freight prepaid. Items covered under warranty will be returned to you freight collect.
It is the responsibility of the installer to ensure that all of the components are correct before
installation. PRW assumes no liability for any errors relative to tolerances, component selection,
or installation.
There is absolutely no warranty on the following:
i. Any parts used in racing applications, or;
ii. any product that has been physically altered, improperly installed or maintained, or;
iii. any product used in improper applications, abused, or not used in conjunction with the
proper parts.
There are no implied warranties of merchantability or fitness for a particular purpose and no
warranties which extend beyond the description of the face hereof.