Owners manual

Part # 1513,1553- 1986-93 Ford V8 5.0L EFI Engines

Part # 1528,1554- 1994-95 Ford Mustang GT

Power Plus Series

Underdrive Pulley Kit

INS-008

The BBK Pulley Kit is designed to increase power by reducing the overall speed of the

serpentine system and should in no way create a charging or cooling problem.

However, an inspection of the fan clutch, thermostat, and radiator should be performed

to insure proper operation.

Vehicles equipped with high amperage drawing stereo systems should check charging

effectiveness before installation of the BBK Underdrive Pulleys.

STEP 7

STEP 8

STEP 6

• Inspect the serpentine belt for wear. Unless

recently replaced, BBK highly recommends the

purchase of a new serpentine belt to

compliment the new pulleys, and install.

• Remove the alternator mounting bolts, lift the

alternator out of its cradle to access the pulley.

Using an impact, remove the stock pulley and

install the BBK Pulley. Re-use the stock nut

and/or washer.

• Re-install the alternator and mounting bolts then

tighten.

STEP 9

• With the serpentine belt on, tighten the water

pump and crank pulley bolts.

STEP 10

• Check that the serpentine belt is properly

seated on all the pulleys, Insure the tensioner

arrow is within the indicator marks on the

tensioner. If adjustment is required, relax the

tensioner from the belt, loosen the upper 9/16”

hex alternator mounting bolt, shift the alternator

towards the air cleaner or allow it to move in as

required within the clearance of the diameters.

Tighten while holding the alternator.