COMP Cams 5100 Camshaft Belt Drive System - Manual (Page 2)

COMP Cams®
3406 Democrat Rd.
Memphis, TN 38118
Phone: (901) 795-2400 Fax: (901) 366-1807
www.compcams.com
Part #131
Revised 5/10/11
Drive Belt Installation Tip: Do not bend, twist or crease the camshaft drive belt, as this will damage
the belt fibers, potentially leading to belt failure. The camshaft drive belt is non-directional and can be
installed in either direction; however, if the belt is removed for any reason, it should be reinstalled to
run in the same direction as it did originally. An easy way to ensure that the belt is always installed
with the same direction of rotation is to install it so that the writing on the belt can be read when
viewed from in front of the engine.
Step 6: Loosen the camshaft bolts just enough to allow the cam gear to be moved slightly. This will
make it easier to slip the belt onto the crank and cam gears.
Step 7: Align the timing marks, lubricate the belt and gears with oil, and push the belt evenly onto
both the top and bottom gears. If installation by hand proves too difficult, a smooth object may be used
to aid in pushing the belt into position.
Step 8: After the belt has been partially fitted onto the two gears, the engine may be rotated by hand to
aid in sliding the belt into position. At this point, the cam bolts should be tightened, but do not secure
them with Loctite® or safety wire. Note: Never use the starter to turn the engine while installing
the drive belt.
Step 9: Degree the camshaft in the same manner that you would with a conventional timing set. See
COMP Cams® Camshaft Installation & Degreeing Instructions, Part #145 for explicit camshaft
degreeing instructions. COMP Cams® instructional DVD, Part #190DVD: “The Proper Procedure to
Install & Degree a Camshaft” is also available. Six camshaft degreeing bushings are provided with
your new belt drive kit to allow from 0 to 5 degrees of advance or retard in 1° increments. When
advancing the camshaft, install the bushing with the number at the top. When retarding the camshaft,
install the bushing with the number at the bottom.
Step 10: After degreeing the camshaft, remove the camshaft retaining plate. Install the roller thrust
button behind the cam retainer plate with no shims at this time.
Step 11: Tighten the camshaft bolts and install the front timing cover with the timing cover gasket in
place. Check camshaft end play with a dial indicator (COMP Part #4909) and set to .001" - .005" with
the shims furnished in the kit. The thrust button furnished is designed to work with COMP Part #210
billet aluminum timing cover or late style GM flat timing covers. Caution should be used when
checking camshaft end play with a stock timing cover, as a stamped steel cover may flex and render an
incorrect end play reading.
Step 12: Rotate the crankshaft and verify that you have adequate belt and gear clearance at all points.
The belt guards will ensure that the belt runs true and does not move in either direction. It is the
responsibility of the installing mechanic to thoroughly check for any belt or gear clearance problems.
Step 13: This is the final installation step. The 6-32 x 3/8"outer belt guard screws should be tightened
with a hex wrench after placing a small drop of Loctite® on the threads. Replacement screws are easily
obtained at any well stocked hardware store and should be changed after every rebuild.