MSD 84891 Chevy Flat Top Pro-Billet Distributor : Installation Owner manual : Page 5

INSTALLATION INSTRUCTIONS 5

M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4

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. Disco n ne c t the wi rin g fro m the

distributor.

5. Loosen the distributor hold down clamp

and slide the clamp out of the way.

6. Lift the distributor out of th e 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

considerat ion when installing the new

distributor.

7. Install the ga sket 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.

Figure 8 Marking the Rotor Location.

INSTALLING THE DISTRIBUTOR

Figure 9 Modiﬁed Block for use with O-Rings.

NOTE: BLOCK MUST BE MODIFIED TO USE O-RINGS.

10. Install the distributor cap and spark plug wires one at a time to ensure correct location.