Universal BBC Comp Series instructions - …

1 INS-24022 STEP 1 STEP 3 JESEL COMPETITION Series rocker KIT FOR BIG-BLOCK CHEVROLET ENGINES (AFTERMARKET HEAD SHOWN) instructions FOR JESEL COMPETITION SERIESROCKER KIT FOR BIG-BLOCK CHEVROLET ENGINES THE JESEL SHAFT-MOUNT COMPETITION Series rocker SYSTEM HAS BEEN DESIGNED TO BOLT DIRECTLY DOWN TO THE CYLINDER HEAD WHEN USING THE VALVE LENGTH COMMONLY SUPPLIED BY THE MANUFACTURER. IF USING A VALVE LONGER THAN WHAT THE CYLINDER HEAD MANUFACTURER RECOMMENDS, STAND SHIMMING MAY BE REQUIRED TO ACHIEVE THE PROPER VALVETRAIN GEOMETRY. PAGE 1 STEP 2 AFTER THE TWO STAND BOLTS ARE INSTALLED YOU CAN GENTLY TIGHTEN THE ALLEN HEAD JOINING BOLTS LINKING THE TWO STANDS TOGETHER TO 12 LBS-FT.

2 IT IS IMPORTANT TO TORQUE THE STAND BOLTS FIRST (BEFORE THE ALLEN BOLTS) TO PREVENT THE STANDS FROM BEING MISALIGNED WHEN INSTALLED ON THE HEADS. NEXT, CHECK THE PUSHROD LENGTH WITH THE SUPPLIED CHECKER. JESEL INCLUDES AN INSTRUCTION SHEET WITH THE CHECKER DEMONSTRATING HOW TO CHECK FOR THE CORRECT PUSHROD LENGTH. THE JESEL comp Series rocker ARM STANDS COME BOLTED TOGETHER WITH THE SUPPLIED 1/4 ALLEN BOLT BUT ARE LEFT SLIGHTLY LOOSE. DO NOT FULLY TIGHTEN THEM AT THIS TIME. USING OIL ON THE THREADS OF THE STAND BOLTS (OR SEALER IF THE INTAKE BOLTS PROTRUDE THROUGH THE PORTS), ATTACH THE STANDS TO THE HEADS AND TORQUE TO 60-65 LBS-FT ON ALUMINUM HEADS AND 65-70 LBS-FT ON CAST IRON HEADS. THIS KIT INCLUDES BOTH 1 AND 1 1/4 STAND BOLTS.

3 JESEL RECOMMENDS USING THE LONGEST BOLT POSSIBLE. WITH THE CAM ON ITS BASE CIRCLE FOR THE CYLINDER YOU ARE USING (OPPOSITE FROM FULL LIFT), INSTALL THE INTAKE AND EXHAUST ROCKERS IN POSITION WITH THE CORRECT LENGTH PUSHRODS AND MAKE SURE TO APPLY LUBE TO THE TIPS OF THE PUSHRODS. TORQUE SHAFT BOLTS TO 26-28 LBS-FT AND ADJUST VALVE LASH ACCORDING TO THE instructions ON THE REVERSE SIDE. UNDER NO CIRCUMSTANCES SHOULD THE SHAFTS BE TIGHTENED OR LOOSENED WHEN SPRING PRESSURE IS PRESENT OR DAMAGE TO THE rocker ARM SHAFTS MAY OCCUR. 1985 CEDAR BRIDGE AVE. LAKEWOOD, NJ 08701 732/901-1800, FAX 732/901-6777 CONTENTS: 7/16 -14 STAND BOLTS=60-65 LBS-FT (ALUMINUM). 7/16 -14 STAND BOLTS=65-70 LBS-FT (CAST IRON).

4 1/4 -20 STAND JOINING BOLTS=12 LBS-FT. 5/16 -18 SHAFT BOLTS=26-28 LBS-FT. ADJUSTER NUTS=25 LBS-FT. TORQUE SPECS: -LOOSEN SHAFT BOLTS UNDER SPRING LOADS- -RUN PUSHROD ADJUSTER OUT PAST TWO TURNS- -RUN WITH ROUGH OR DAMAGED PUSHROD TIPS- -ALLOW PUSHRODS TO RUB AGAINST HEAD SURFACE- -DEGREASE ROCKERS AND RUN WITHOUT LUBE- -OVERTIGHTEN ADJUSTER NUTS- -MODIFY ADJUSTER COUNTERBORE- WARNING-DO NOT: 1. ROTATE ENGINE UNTIL EXHAUST rocker BEGINS TO OPEN EXHAUST VALVE. SET INTAKE LASH TO THE DESIRED SPEC. 2. ROTATE ENGINE UNTIL INTAKE rocker BEGINS TO RETURN FROM ITS FULL LIFT POSITION. SET EXHAUST LASH TO SPEC.

5 3. REPEAT FOR THE REMAINING SEVEN CYLINDERS FOLLOWING YOUR ENGINES FIRING ORDER SPECS. VALVE ADJUSTMENT: THE OPERATING RANGE FOR THE LASH ADJUSTER IS 1/4 TO TWO TURNS OUT FROM THE SEATED POSITION AND ARE SHIPPED FROM JESEL ONE FULL TURN OUT. IF ADJUSTER IS MORE THAN TWO TURNS OUT, USE A .050 LONGER PUSHROD AND A .050 SHORTER PUSHROD IF THE ADJUSTER IS LESS THAN 1/4 TURN FROM THE SEATED POSITION. (DO NOT MODIFY ADJUSTER COUNTERBORE)AB C D D E,F G H I rocker SERVICE PARTS: J COMPONENTS SHOWN FOR ONE CYLINDER HEAD rocker RATIO CODES: 70= RATIO, 75= RATIO CAAI70 PROFILED TAIL PAGE 2 A) 16-IRA-14687 rocker ARMS SPECIFY RATIO WHEN ORDERING B) 8-STN-20** INTAKE STANDS C) 8-STN-20** EXHAUST STANDS **NUMBERS VARY PER APPLICATION D) 33-BLT-21760 5/16 X 1 SHAFT BOLTS* E) 17-BLT-21892 7/16 X 1 STAND BOLTS* F) 17-BLT-21893 7/16 X 1 1/4 STAND BOLTS* G) 8-BLT-21888 STAND JOINING BOLTS H) 1-TOL-19210 T45 TORX SOCKET I) 1-TOL-19221 T50 TORX SOCKET J) 1-TOL-29400 5 pc.

6 PUSHROD CHECKER *ONE EXTRA BOLT PROVIDED THESE INSTRUCTION SHEETS ARE INTENDED AS REPRESENTATIONS ONLY. JESEL IS IN NO EVENT LIABLE FOR CONSEQUENTIAL DAMAGE, INSTALLATION COST OR OTHER COST OF ANY NATURE. NO REPRESENTATIVE IS AUTHORIZED TO ASSUME FOR JESEL ANY OTHER LIABILITY IN CONNECTION WITH ANY JESEL PRODUCT. NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS. SFT-28005 rocker SHAFT RNG-26210 SHAFT RETAINING RING BRG-20610 SHAFT BEARING ADJ-20230 LASH ADJUSTER NUT-24500 ADJUSTER NUT WSH-29800 ADJUSTER WASHER