Removal
1. Remove the N1 chain tensioner, guide, N1 sprocket and camshaft chain.
2. Secure the balance shaft chain tensioner plunger with the pin (1).
3. Loosen the bolt and remove the N₂ damper.
4. Unscrew the bolts (indicated by arrows) and remove the N3 damper.
5. Unscrew the nut (indicated by the arrow) and remove the chain tensioner.
6. Loosen the bolt and remove the upper shaft drive gear and chain.
7. Unscrew the bolts (indicated by arrows) and remove the N4 damper.
Examination
Chain and gears
1. The chain and gears are replaced as a set. The gear is pressed off the shaft. Clean the parts.
2. Check the condition of the parts. Replace if signs of wear are found.
3. The chain should be changed after a certain mileage or if there is noticeable damage, or if there is play in the links.
View the full text on the portal: www.TOYOTAMAN.ru
Balance shaft
4. Check the shaft axial play by moving it back and out.
5. Remove both shafts.
6. Check the condition of the shafts carefully (if necessary, contact a car service center).
Installation
Attention! Before installing the balance shafts, it is necessary to install the crankshaft, pistons with connecting rods and set the piston of the 1st cylinder to TDC of the compression stroke, so that the counterweights of the balance shafts are at the bottom.
1. Install the shafts and tighten the cover bolts.
2. Install the damper.
3. Install the balancer chain by aligning the marks (2) on the crankshaft sprocket (1) and on the balancer shaft gear (3) with the chain's distinguishing links. Position another distinguishing link opposite the large installation mark on the balancer shaft's drive gear. Insert the drive gear shaft into the hole in the balancer shaft's thrust plate. Align the small marks on the drive gear with the marks on the balancer shaft gear.
4. Tighten the pinion bolt to the specified torque.
5. Install the N3 damper, then the N₂ damper, tightening the bolts. Remove the pin from the plunger.