The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

BossHogg69 · 02-26-2017, 11:59 AM

The GM factory roller cams use a cam retainer plate to hold the cam in the block and the bolt pattern for the cam gear is smaller that factory non-roller cam or retro fit aftermarket rollers. The cam has a stepped nose on the cam gear end of it. The Cloyes Gear part numbers for the 85-up non Vortec roller cam engines (like the L98 TPI engines) are 9-1146 (better), 9-3146 (best) for their performance double roller sets. The '96-88 Vortec (L31) single roller performance sets for roller cams are 9-1157 (better) & 9-3157 (best) if using the plastic timing cover.

If you have any questions call the Cloyes Tech line 479 646 1662 and ask for Mike Senia. he's the product development/tech guy there. Way more accurate info getting it from the source.

02-26-2017, 11:59 AM	#4
BossHogg69 motor exploder Join Date: Mar 2009 Location: Pittsburgh, PA Posts: 2,346	Re: Vortec Timing Set The GM factory roller cams use a cam retainer plate to hold the cam in the block and the bolt pattern for the cam gear is smaller that factory non-roller cam or retro fit aftermarket rollers. The cam has a stepped nose on the cam gear end of it. The Cloyes Gear part numbers for the 85-up non Vortec roller cam engines (like the L98 TPI engines) are 9-1146 (better), 9-3146 (best) for their performance double roller sets. The '96-88 Vortec (L31) single roller performance sets for roller cams are 9-1157 (better) & 9-3157 (best) if using the plastic timing cover. If you have any questions call the Cloyes Tech line 479 646 1662 and ask for Mike Senia. he's the product development/tech guy there. Way more accurate info getting it from the source. __________________ Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac Use the SEARCH function on this forum - it is your friend!! Last edited by BossHogg69; 02-26-2017 at 12:07 PM.