Lexus 13408-20010 Pulley, Crankshaft

The harmonic balancer assembly consists of two shafts contained in an upper and lower aluminum housing assembly. The shafts are geared together, and one of the shafts is geared to the crankshaft. The following procedure applies only when the harmonic balancer assembly is removed from the engine. Do NOT disassemble the harmonic balancer assembly! Start with the punch marks on the number 2 shaft lined up as indicated. The balancer shafts have punch marks and the number 2 housing has alignment notches - start with the shafts aligned, then align the number 2 shaft so that mark D is aligned with the housing. Using locking pliers to hold the number 2 shaft from turning, measure the backlash on the number 1 gear with a dial indicator. Set up the dial Indicator as shown and measure the backlash while applying mild hand pressure on the rear of both shafts, while keeping forward pressure on the rear of both shafts to eliminate thrust play. Compare the backlash to the specifications. Remove the dial indicator and turn the number 2 shaft so that punch mark E now aligns with the case. Measure backlash again compare the results with the specifications. Remove the dial indicator again and turn the number 2 shaft so that punch mark F now aligns with the case. Measure backlash again compare the results with the specifications. If any of the three measurements exceed the specifications, it is suggested that the harmonic balancer assembly be taken to a Toyota dealer or other qualified service facility for further disassembly and repair.

The balancer mounting bolts should be loosened in the recommended sequence, 1/4 turn at a time, until they can be unscrewed by hand.

After checking balance shaft endplay, the balancer shaft gear-to-crankshaft gear backlash should be checked at four indicated locations.

The remainder of the installation is the reverse of removal.

Disconnect the cable from the negative battery terminal.