PRW 25 PQ Series Racing FluidGel Harmonic Damper (SFI-Rated 18.1) - Manual

PRW Industries, Inc.
1722 Illinois Avenue
Perris, California 92571
Tele: (951) 436-7900
Tech: (888) 377-9779
PQ Series SFI Fluid Damper Installation Instructions
Parts List
Item Quantity
Vibration Damper 1 each
SFI 18.1 Certification Sticker 1 each
Step 1
Make certain the engine is cold.
Step 2
Line up the TDC mark on the damper with the timing tab before removal. Then, pull the original damper from the crank snout using your damper
removal tool. If marks don’t line up after the new damper is installed, you will need to get an aftermarket bolt-on timing tab.
Step 3
Check the end of the crank to ensure the crank has a tapped hole and that the threads are clean and not damaged. If the damper bolt does not thread
easily into the crank, run a tap into the threads to clean them up.
Step 4
Examine the key. If it is damaged or loose in the keyway, replace it. Make sure the key does not sit too high in crank.
Step 5
Replace the oil seal in the front timing cover. This is optional but highly recommended.
Step 6
For external balanced engines remove the outer ring from the hub, then balance. After balancing is complete, the damper ring can be re-installed. Be
sure to properly torque all bolts.
P/N’s 2540001 & 2540011: 28 foot-pounds
P/N’s 2545401 & 2545411: 38 foot-pounds
P/N’s 2530201, 2530211, 2530202, & 2530212:
24 foot-pounds
Step 7
For internal balanced engines balance the assembly without the damper. The inertia ring inside is balanced at a close tolerance to the OE specs.
Step 8
Use emery cloth to remove burrs, nicks, and sharp edges on damper snout and any sharp keyway corners.
Step 9
Prior to installation heat the damper in boiling water or place in a preheated oven at a maximum of 250° Fahrenheit for 15 minutes. Use insulated
heatproof gloves to handle after heating.
Step 10
Apply an anti-seize compound on crankshaft snout and in the damper hub.
Step 11
Position the damper on the crank snout. Rotate to align the keyway in the damper precisely with the key in the crank.
Step 12
Install the damper using the proper installation tool. Do not “hammer” the damper on. (this will void the warranty) You should meet smooth steady
resistance until the damper is fully seated against the timing gear or spacer.
Step 13
Install damper bolt and washer to proper torque specs.
Small Block Chevy: 70 foot-pounds
Big Block Chevy: 110 foot-pounds
Ford: 110 foot-pounds
Mopar: 150 foot-pounds
Pontiac, Oldsmobile, & Buick: 160 foot-pounds