IMPORTANT: The balance shaft with front bearing are serviced as an assembly. Use only the correct tools for bearing and shaft installation. Inspect the balance shaft driven gear and the drive gear for nicks and burrs. Piston and Connecting Rod Removal Figures 12-18 and 12-19 Tools Required: J 24270 Ridge Reamer J 5239 Guide Set Remove or Disconnect 1 . Ridge or deposits from the upper end of the cylinder bores as follows: A . Rotate the crankshaft until the piston is at BDC. B . Place a cloth on top of the piston. Figure 12-15 Balance Shaft and Components Figure 12-16 Removing Balance Shaft Figure 12-18 Removing Cylinder Ridge C . Perform the cutting operation with J 24270 (figure 12-18).
D . Rotate the crankshaft until the piston is at TDC. E . Remove the cloth and cuttings. F . Repeat this procedure for each piston. 2 . Mark the cylinder numbers on the tops of each piston. Figure 12-17 Removing Balance Shaft Rear Bearing G643 (E) Service Manual Chapter 3. Engine Mechanical System 69