COMP Cams 6100 Hi-Tech Belt Drive System User Manual

#6100 Hi-Tech™ Belt Drive System

Thank you for choosing COMP Cams® products; we are proud to be your manufacturer of choice.
Please read this instruction sheet carefully before beginning installation, and also take a moment to
review the included limited warranty information.

INSTRUCTIONS

Kit Contents:

• Belt drive main plate with crank seal and

cam studs

• Main plate attachment bolts (10) 1/4”-20

• Belt

• Upper gear assembly

• Lower gear assembly

• Cam adapter

• Cam adapter bolts (3) 5/16”-18

• Upper gear retention bolt/washer (left hand

thread)

• Bronze thrust washers (2)

Tools Required:

• Torque wrench

• Allen wrenches (5/16”,

5/32” & 1/4”)

• Crankshaft gear installer

#4933

• 5/8” socket & wrench

• Camshaft degree kit #4796

• Tube of RTV or suitable

replacement

• Small supply of motor oil

• Thread locker

• Endplay adjustment shims (3)

• Cam retention plate assembly

• Cam retention plate locknuts (6) 1/4”-20

• Spanner wrench

Note: These instructions begin with the previous cam drive system removed and the cam still
in the block. Rocker arms should be removed to facilitate easily rotating the cam itself. It is
also best to start a first time installation with the oil pan removed, since some interference
between the block and belt drive main plate may exist, necessitating repeated trial fittings of
the main plate.

COMP Cams®

3406 Democrat Rd.

Memphis, TN 38118

Phone: [phone] Fax: [phone]

www.compcams.com

Part #196

Revised 11/22/06

Installation Instructions:

1. Main plate installation – Temporarily install the main plate on the front of the engine, placing

the block dowel pins in the holes in the back of the plate as guides. Attempt to push the plate
flush against the block. Interference between the back of the plate and the block may exist,
preventing the plate from going on all the way. Note the location of interference, remove the
plate, and grind the block accordingly to provide adequate clearance. Do not grind the plate,
this may weaken it and cause failure! Once the adequate clearance has been obtained, place a
regular front cover gasket on the block, the proper oil pan front seal (thick or thin, depending
on which your oil pan requires) in the main plate groove, and install the main plate with the
1/4”-20 button head Allen screws supplied.

2. Cam installation – Lightly lubricate both sides of the smaller bronze thrust washer (supplied)

with motor oil, and install it over the end of the cam protruding from the block. Apply a light
coat of RTV to the cam mating surface of the cam adapter hub, and slide it on the end of the
cam, making sure to engage the cam dowel pin in the blind hole in the
adapter. Put a dab of thread locker on the cam adapter hub bolts
(supplied) and screw them into the cam. Using the spanner wrench as
shown in Figure 1, torque these three bolts to 25 ft lbs. Lightly
lubricate both sides of the second (larger) bronze thrust washer with
oil, and install it over the cam adapter. Then, using all the shims
supplied, install the cam retention plate and shims over the studs
protruding from the main plate and secure with the 1/4”-20 lock nuts
supplied. Check cam endplay. Remove shims and repeat the
measurement until endplay is .005-.010”. After endplay is correct,
remove the shims and plate one last time and lightly coat between

Fig. 1

them with RTV.

3. Crank hub installation – Remove the outer belt guard from the crank gear by loosening and

removing the four button head Allen screws from the font of the gear. Set the guard and screws
aside for reinstallation later. Install the lower gear with suitable soft metal driver like COMP
Cams® Part #4920. Do not use just a hammer to beat the lower gear on. Severe damage to the
lower gear may result from doing so. Make sure that the crank gear goes all the way on the
crank up against shoulder on the snout. Some cast cranks have an extremely generous radius
down to this step that prevents the gear from going all the way back against the step. Provisions
must be made to eliminate this potential interference if it exists or belt misalignment will occur.

4. Belt installation – Install the upper gear over the cam adapter, making

sure to align the key on the adapter with the keyway in the upper gear.
Start the upper gear retention bolt/washer (remember – left hand thread)
in the end of the adapter one thread or so. Rotate both the cam and
crank until the markings on the upper and lower gears are aligned as
shown in Figure 2. Remove the upper gear retention bolt and gear.
Keeping the gear rotated the same as it came off the engine, slip the belt
over upper gear. Then with the upper gear in one hand, slip the belt over
the lower gear, making sure that the timing marks on both stay aligned.

Phone: [phone] Fax: [phone]

COMP Cams®

3406 Democrat Rd.

Memphis, TN 38118

www.compcams.com

Fig. 2

Part #196

Revised 11/22/06