85555 datasheet(5/8 Pages) MALLORY

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INSTALLATION INSTRUCTIONS

MSD • WWW .MSDPERFORMANCE.COM • (915) 857-5200 • F AX (915) 857-3344

1. Remove the existing distributor cap without

disconnecting any of the spark plug wires.

2. With the cap off, crank the engine until the

rotor is aimed at a fixed point on the engine

or firewall. Note this position by making a

mark (Figure 8).

3. Place the distributor cap back on and note

which plug wire the rotor is pointing to. MARK

THE SPARK PLUG WIRES and remove the

distributor cap.

4. Disconnect the wiring from the distributor.

5. Loosen the distributor hold down clamp and

slide the clamp out of the way.

6. Lift the distributor out of the engine. Note that

the rotor rotates as you lift the distributor out.

This is due to the helical cut gear and should

be taken into consideration when installing

the new distributor.

7. Install the gasket and apply a liberal amount of

the supplied lubricant to the distributor gear.

(The supplied O-rings can

only be used if the

block has been modified as shown in Figure

9.)

8. Install the distributor making sure that the

rotor comes to rest pointing at the fixed mark.

If the distributor will not fully seat with the

rotor pointing to the marked position, you

may need to rotate the oil pump shaft until the

rotor lines up and the distributor fully seats.

9. Position and tighten the hold down clamp

onto the distributor.

10. Install the distributor cap and spark plug wires

one at a time to ensure correct location. A

wire retainer is supplied to secure the wires

in place. Align the mounting bosses and use

the supplied 1.5" self-tapping Phillips screws

to hold the retainer in place.

Figure 8 Marking the Rotor Location.

INSTALLING THE DISTRIBUTOR

Figure 9 Modified Block for use with O-Rings.

Figure 10 Optional Installation by Bolting Cap Down.

Installation Option: This Cap can also be

bolted down to an MSD Pro-Billet or Billet

Distributor base with the supplied hardware.

To accomplish this, the spring clips must be

cut off (Figure 10).

Note: When the cap is bolted down, the

location of the spark plug wires must

be changed.

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