M-6007-Z427AFT/ART
Crate Engine
INSTALLATION INSTRUCTIONS
NO PART OF THIS DOCUMENT MAY BE REPRODUCED WITHOUT PRIOR AGREEMENT AND WRITTEN PERMISSION OF
FORD RACING PERFORMANCE PARTS.
Techline 1-800-367-3788
Page 6 of 19
IS-1850-0387
Factory Ford shop manuals are available from Helm Publications, 1-800-782-4356
STEP 8:
Using the vertical line on the distributor shaft and the noted dimension (see
STEP 4
), roughly plot where
the original roll pinhole is located. Drill a new .125" hole 90˚ from the original hole, above or below it,
through the gear and the shaft.
NOTE:
It is important that the dimensions called out in Figure 1 are maintained while drilling.
STEP 9:
Insert roll pin and check dimensions (see Fig. 1).
WARNING:
If the distributor gear is installed incorrectly, it may be forced down against the support in the block or may
be held up away from the support in the block. Both conditions will cause damage to the block and or the
block and gears. When the gear is properly installed, the cut on the gears and the direction of rotation will
pull the distributor gear down against the support (distributor gear thrust face) in the block.
Fig. 1
ALTERNATIVE METHOD OF VERIFYING CORRECT DISTRIBUTOR GEAR INSTALLATION:
After
STEP 7
, install distributor assembly in the block you are using. Timing chain set and camshaft must be removed.
With the aluminum distributor housing fully seated against the block, verify that the distributor gear can be lifted off the
support in the block at least .005". Next pull the distributor gear down against the support in the block and hold it there.
Pull up on the aluminum distributor housing and verify that you can lift it up at least .005" while holding the gear against
the support in the block. This procedure will confirm that the gear is not being forced down against the support and not
being held up off the support in the block.
Continue with
STEP 8
.
COMMON DISTRIBUTOR PROBLEMS
Distributors with very little or no shaft endplay. This has been found with new and remanufactured distributors. Improper
endplay may force the gear against the support in the block or hold it up off the support, causing damage.
Distributors that have a different material gear than advertised. It is important to run the correct distributor gear for the
camshaft that you are using. Consult the manufacturer of the camshaft you are using for gear recommendation.
Some heavy-duty oil pump drive shafts may not allow an EFI distributor to slide down far enough over the oil pump drive
shaft. EFI distributors have a longer shaft below the gear.
Running an HV oil pump with production bearing clearances can cause abnormally high oil pressure and possible
premature distributor gear wear.
Gears on camshafts with a very poor finish. This could cause premature distributor gear wear.
