MSD 8513 Oil Plug Wet Sump Chevy V8 Installation - Manual

MSD Pro-Billet Chevrolet Plug
Wet Sump, PN 8513
Parts Included:
1 - Distributor Plug, PN 8513 2 - O-ring Seals
1 - Gasket 1 - Tube of Gear Lubricant
Note: MSD Distributors use a shaft with a 0.500" OD Shaft. If the gear must be replaced, use MSD
Gears: Steel - PN 8531, Bronze - PN 8431 and Bronze 0.006" oversized - PN 8472.
ADJUSTING THE SLIP COLLAR
If any modifications have been done to the intake manifold deck of the block or heads, the deck
height may have changed. The Slip Collar allows you to compensate for these changes.
Before installing the Pro-Billet Distributor Plug, the slip collar adjustment may need to be set.
MSD offers a special tool, the 3-in1 Distributor Set Up Tool, PN 8599, to make these adjustments
accurately. If the tool is not available, follow this procedure.
1. Loosen the slip collar and insert the distributor into the engine until it bottoms out against the
oil pump drive.
2. After it bottoms out, raise the distributor 0.010" - 0.030" then slide the slip collar down into position
and tighten it.
CHECKING GEAR MESH
It is recommended to check for proper gear mesh between the cam gear
and distributor gear. To do this, coat the distributor gear with moly grease
and install the distributor. Crank the engine over several times, pull the
distributor out and inspect the gear pattern shown on the grease. The proper
mesh will leave an even pattern in the middle of the gear (Figure 1). Adjust
the slip collar to obtain the correct mesh.
CHECKING THE OIL PUMP TO DISTRIBUTOR SHAFT OVERLAP
The proper overlap between the distributor shaft and the oil pump shaft is
very important. The tongue of the distributor shaft should fit into the groove
of the oil pump shaft by at least 1/4". To check this:
1. Measure the distance between the base of the slip collar to
the tip of the distributor shaft (Figure 2).
2. Using a straight edge, measure the distance from the intake
manifold distributor flange to the bottom groove on the oil
pump shaft (Figure 2).
3. Take the two measurements and subtract them.The difference
is the overlap. If there is not enough or too much overlap a
different oil pump shaft is required.
Figure 1 Correct Gear Mesh.
MEASURE MEASURE
INTAKE MANIFOLD
OIL PUMP
DRIVE SHAFT
Figure 2 Measuring Oil Pump Overlap.
M S D
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