Aligning Balance Shafts

With balance shafts installed in carrier, position carrier (if removed) on crankcase and install carrier bolts. Tighten bolts to specification.
Rotate both balance shafts until shaft keyways are facing upward (parallel to vertical centerline of engine). Install short hub drive gear on (sprocket) driven shaft. Install long hub gear on (gear) driven shaft. After installation, ensure balance shaft keyways remain facing upward when alignment marks are together. See Fig 1.

Fig 1: Aligning Balance Shafts
Courtesy of CHRYSLER MOTORS.
Install gear cover and tighten double ended stud to 105 INCH lbs. (12 N.m). Install crankshaft chain (upper) sprocket. Rotate crankshaft until No. 1 cylinder is at TDC. Ensure crankshaft sprocket timing mark aligns with No. 1 main bearing cap parting line. See Fig 2.
Install chain over crankshaft sprocket with nickel-plated link of chain aligned with timing mark on crankshaft sprocket. See Fig 2.
Install balance shaft chain (lower) sprocket into timing chain with timing mark (Yellow dot) of sprocket aligned with lower nickel plated link on chain. See Fig 2.
NOTE: Upper and lower nickel-plated chain links should align with timing marks of upper and lower chain sprockets, respectively.

Fig 2: Aligning Balance Shaft Timing Marks
Courtesy of CHRYSLER MOTORS.
With balance shaft keyways at the 12 o'clock position, install balance shaft chain sprocket on nose of left balance shaft. Balance shaft may have to be pushed slightly inward to allow for clearance.
NOTE: Balance shaft timing is set correctly when timing mark (Yellow dot) on balance shaft chain (lower) sprocket and lower nickel-plated chain link are aligned with arrow on chain cover. See Fig 2.
Install sprocket retaining bolts and tighten to specification. See TORQUE SPECIFICATIONS . Adjust chain tension. See CHAIN TENSIONING in this article. To install remaining components, reverse removal procedure.