Milodon Gear Drive - Under Stock 13600, 13700, 13900, 14000, 14100, 14200, 14300, 14500, 14600 - Manual

MILODON
2250 Agate Court
Simi Valley, Ca 93065
(805) 577-5950
GEAR DRIVE INSTALLATION
#13600, 13700, 13900, 14000, 14100, 14200, 14300, 14500 and 14600
302-460 Ford, 340-360 Small Block Chrysler, Pontiac, Olds and AMC
Congratulations! You have just purchased the finest competition gear drive on the market today. This unit
is made of aircraft quality steel right here in the United States, all in Milodon's own plant. With proper installation,
this gear drive will out last and out perform any other cam timing device available.
Follow these instructions carefully. We recommend that the engine be on an engine stand to install the
gear drive. If this gear drive is to be installed on a fully assembled engine, rather than just initially being assembled,
rotate the engine to T.D.C. #1 cylinder compression stroke. Remove the stock cover, gears, timing chain. Prepare
the front of the block with a stone or file, and debur the area around the front of the cam boss.
Install the mounting plate, using the Milodon supplied bolts, loosely in the stock cam retainer bolt holes.
Place the 3 piece roller bearing assembly on the back of the new cam hub. Be sure the bearing has a thrust washer
on each side . Installation Tip: Bearings can be held in place while assembling by coating with thick grease. Slide
the hub assembly on the front of the cam. Be sure the dowel pin is in good condition then proceed to install the cam
gear on the hub. The Milodon cam hub for 14200 and 14600 Fords is double drilled to stop shearing off the single
facrory dowel, and any high end use should use a doulbe doweled cam to match this hub. The hub has a seven bolt
verneer pattern. Bolt it up in any hole location at this time. Install the crank gear with the chamfer toward the
engine.
You can now proceed with the backlash adjustment. Use a single strip of newsprint (not gloss magazine
paper) 1/2" wide x 6" long, and wrap the newsprint around the idler gear, between the cam gear, idler gear and
crank gear. Press the mounting plate and idler gear assembly firmly by hand toward the cam and crank gears , being
sure the newsprint is in place. This centers the idler gear between the other two gears as well as sets the lash
between two pairs of gears all in one procedure. A dial indicator while appearing more high tech, can not
accomplish all these procedures.
Extreme care must be taken to correctly position the lower mounting holes, as these are the holes that will
locate your gear drive and hold the correct lash while in operation. Holding pressure firmly against idler, with the
newspaper still in place, tighten the top bolts. Using the mounting plate as drill fixture, drill and tap the bottom
holes as follows. For 1/4" diameter bolts as on 14100, 14200, 14500 and 14600 use a 1/4" drill and just spot drill
1/16" deep only, then drill through using a #7 drill. Tap, using a 1/4" x 20 tap. For 5/16" bolts as on 13600, 13700
and 14000 use a 5/16" drill and just spot 1/16" deep only, drill through with a letter "F" drill, if a letter "F" drill is
not available use a 17/64 drill, tap 5/16" x 18. For 13800 and 13900 drill through the plate into the block with a #7
drill. Remove plate and redrill lower plate holes to 1/4" and tap the block for 1/4 x 20 thread.
Again, extreme care must be taken to ensure the correct positioning of these holes. Also be sure the holes
are drilled and taped straight. Now install and tighten all the plate mounting bolts using Loctite. Run another strip of
newspaper through the gears. If the paper tears through, then the gear lash is too tight and must be reset. Gear lash
that is too tight will overload the idler bearing causing failure that will void all warranty. If the mesh is correct there
should only be a slight impression on the paper. If a dial indicator is used to check the lash between gears, the lash
should be .006 to .008 on each pair of gears.
Important: The idler axle has been installed at the factory with Loctite using 18 ft/lbs torque on 1/4-28
bolts and 22 ft/lbs on 5/16-24 bolts. It is recommended that this torque be checked before initial installation Each
time the engine is disassembled these bolts should also be removed, cleaned, re-Loctited and retorqued to the proper
specs. This will provide worry free, rel
iability even in 500 mile races, and in street use this assembly will last indefinitely.
Engine Specific Instruction Sheets