6691 OTC Cam Shaft Tool Set. Oversized retaining plates lock camshafts together at top dead center (TDC) on GM 2.8L 3.0L and 3.6L DOHC engines. Three-plate set is used to tighten both sets of cams to prevent them from turning while setting timing. Extra-large size prevents valve covers from being installed with the plates in place, protecting the engine. Similar to EN-48383.
 
These retaining plates are used lock the camshafts together at TDC to keep them from turning while setting timing
Includes 3 plates: one plate is used to tighten one set of cams, two plates are used in conjunction to tighten the second set of cams. Plates are oversized to prevent valve covers from being installed with the plates in place
Similar to EN-48383
 

Direct replacement for Cadillac, Buick, Saturn, Pontiac, Chevrolet. Specialty EN 46105 / EN 48383 car camshaft retaining tools for V6 high feature engine 2.8L, 3.0L, 3.6L, 3.6L VIN 7, 2.8L VIN 7. Compatible with GM vehicle models: CTS, SRX, STS, GMC Acadia, Lacrosse, Enclave, Aura, Pontiac G6, Outlook, VUE, Torrent Malibu, Equinox, Camaro, Traverse, and Rendezvous. The camshaft holding tools precisely locks the left and right cams. The retaining plates placed on both side of the head to prevent rotation and hold the camshaft at TDC firmly for precise timing.

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov