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INSTRUCTIONS Adjustable Timing Set Part #3100KT, #3110KT, #3146KT 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.
Kit Contains: (1) Upper Timing Gear (1) Lower Timing Gear (3) 5/16-18 x 3/4 Hex Head Bolts (1) Camshaft Thrust Bearing Tools and Supplies Needed: 1. ¼” Hex Wrench 2. Torque Wrench 3. Harmonic Balancer Installation Tool #4920 4. Crankshaft Timing Gear Installation Tool #4993, used in conjunction with #4920 5. Crankshaft Socket #4793 - SBC or #4797 - BBC 6. Camshaft Degree Kit (#4796 - including degree video) 7. Cam & Lifter Installation Lube (#153 or #154) 8. Cam Button (#200 or #202 for SBC or #205 or #207 for BBC). This is required on mechanical or hydraulic roller camshafts, optional on mechanical or hydraulic flat tappet camshafts. 9. Thread Locking Compound 10. Cleaning Solvent COMP Cams® 3406 Democrat Rd. Memphis, TN 38118 Phone: (901) 795-2400 Fax: (901) 366-1807 www.compcams.com
Part #173 Revised 12/4/07
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Installation: Note: Installation procedure begins after the timing cover and old timing set have been removed. 1. Loosen all rockers so the camshaft turns freely; you should be able to turn the cam by hand. 2. Clean everything! Make sure that the engine mounting surfaces and your new timing set have been thoroughly cleaned with a good solvent. 3. Select the appropriate keyway for the camshaft timing specifications. COMP Cams® recommends the standard timing position, which uses the round timing mark and round keyway mark. (We will adjust cam timing using our next bushing on our camshaft gear.) 4. Using your lower timing gear installation tool (#4920 & #4933), install the lower gear on the crankshaft, making sure the gear is fully seated against the crankshaft flange and the timing marks on the gear are toward you. (Never strike the lower with a hammer or chisel.) 5. Now that the lower crankshaft gear is installed, rotate the crankshaft using your crankshaft socket (#4793 for SBC or #4797 for BBC), until the appropriate timing mark on the crankshaft gear tooth is in the 12:00 position and the crankshaft gear keyway slot is in the 2:00 position. The number one piston should now be at Top Dead Center (TDC). 6. Inset the offset bushing, with the hex hole, into the key shaped slot in the camshaft sprocket hub. Rotate it with a ¼” hex wrench so that the timing mark on the bushing points away from the center of the hub (see diagram above). 7. Apply a thin film of Cam & Lifter Installation Lube (#153 or #154) onto the backside of the camshaft sprocket, where the thrust bearing will be placed, and also to the thrust bearing and spacers. 8. Lay the camshaft gear face down on your working surface and place the thrust bearing onto the hub. 9. With the bearing in place, carefully pick up the camshaft gear and loop the chain over it. Align the camshaft and crankshaft timing marks, and loop the chain around the crankshaft gear. Lift the camshaft gear into place on the camshaft, keeping the thrust bearing and the offset bushing in place. Make sure that the camshaft gear timing mark aligns with the proper crankshaft timing mark. (The camshaft timing mark should be at 6:00 and the crankshaft gear timing mark should be at the 12:00 position. If this procedure is missed by even one tooth, engine damage can result.) Check to make sure that the outer thrust bearing spacer has not slipped off the shoulder of the hub sprocket. Loosely bolt the camshaft gear in place using the three 5/16-18 x 3/4 hex socket cap screws supplied with the kit. Be sure to leave the bolts slightly loose for now. 10. Install the proper cam button (#200 or #202 for SBC; #205 or #207 for BBC) using the instructions supplied with your cam button. Note: Required on mechanical and hydraulic roller camshafts, optional on mechanical or hydraulic flat tappet camshafts.
COMP Cams® 3406 Democrat Rd. Memphis, TN 38118 Phone: (901) 795-2400 Fax: (901) 366-1807 www.compcams.com
Part #173 Revised 12/4/07
3 11. Do not try to turn the camshaft with the bushing unless there is no (none at all) load on the camshaft. There must be no valve spring pressure against the camshaft or the bushing may split. Make sure that the three camshaft bolts are loose. Adjust the bushing with your ¼” hex wrench to the desired setting. For a more accurate installation, we recommend that you degree your camshaft at this time using the instructions and video provided with your COMP Cams® Degree Kit (#4796). 12. Torque the three cam sprocket mounting bolts to 25 ft./lb. If camshaft bolts loosen up, severe engine damage can result. A good thread locking compound should be used on all bolts. 13. Make sure that the engine oil has a clear path to the timing set through the lifter valley oil drain back holes or through some other means. Timing sets require plenty of oil to survive. Before installing the timing gasket and cover, pour plenty of Cam & Lifter Installation Lube (#153 or #154) over the entire timing set. The proper lube will protect your timing set during final assembly and initial startup. 14. Install the cover and gasket. COMP Cams® offers a cast aluminum two piece front cover that simplifies camshaft timing changes without disturbing the oil pan seal. Erratic ignition timing problems caused by timing cover flex are also eliminated. This cover offers all the strength and rigidity necessary for easy use and no bothersome oil leaks (#210 for SBC and #212 for BBC applications). 15. Using your harmonic balancer installation tool (#4920), install your balancer and balancer bolt. Warning: Never strike your balancer with a hammer. By following these instructions, the installation of your Hi-Tech™ True Roller Timing Set will produce many trouble free miles.
COMP Cams® 3406 Democrat Rd. Memphis, TN 38118 Phone: (901) 795-2400 Fax: (901) 366-1807 www.compcams.com
Part #173 Revised 12/4/07
4 Limited Warranty Competition Cams, Inc. warrants that all of its products are free from defects in material and workmanship, and against excessive wear for a period of (1) one year from the date of purchase. This limited warranty shall cover the original purchaser. Competition Cams, Inc.’s obligation under this warranty is limited to the repair or replacement of its product. To make a warranty claim, the part must be returned within (1) one year of purchase to the address listed below, freight prepaid. Items covered under warranty will be returned to you freight collect. It is the responsibility of the installer to ensure that all of the components are correct before installation. We assume no liability for any errors made in tolerances, component selection, or installation. There is absolutely no warranty on the following: A) Any parts used in racing applications; B) Any product that has been physically altered, improperly installed or maintained; C) Any product used in improper applications, abused, or not used in conjunction with the proper parts. There are no implied warranties of merchantability or fitness for a particular purpose. There are no warranties, which extend beyond the description of the face hereof. Competition Cams, Inc. will not be responsible for incidental and consequential damages, property damage or personal injury damages to the extent permitted by law. Where required by law, implied warranties or merchantability and fitness are limited for a term of (1) one year from the date of original purchase. This warranty gives you specific legal rights and you may also have other legal rights, which vary from state to state.
COMP Cams® 3406 Democrat Rd. Memphis, TN 38118 Phone: (901) 795-2400 Fax: (901) 366-1807 www.compcams.com
Part #173 Revised 12/4/07
