Balance Shaft: Service and Repair
BALANCE SHAFT
Tools Required:
^ J 6125-B Slide Hammer
^ J 36995
^ J 36995-UPD Balance Shaft Remover
Remove or Disconnect
1. Flywheel.
2. Rear main oil seal housing.
3. Lower intake manifold.
4. Lifter guide retainer.
5. Front cover.
6. Balance shaft drive gear bolt.
7. Camshaft sprocket and timing chain.
8. Balance shaft retainer bolts, retainer and gear.
9. Balance shaft using J 6125-B.
10. Balance shaft rear bushing using J 36995-5, J 36995-3A and J 36995-2A.
^ It may take a considerable amount of force to loosen the bushing from the block bore.
Tools Required:
^ J 8001 Dial Indicator
^ J 21465-13 Drive Handle Extension
^ J 36660 Torque Angle Meter
^ J 36995
^ J 36995-UPD Balance Shaft Bushing Installer
^ J 36996 Balance Shaft Installer
Install or Connect
1. Make sure rear main oil seal housing gasket is removed and no debris remains.
2. Dip bushing in clean engine oil before installation.
3. Balance shaft rear bushing using J 36995-2A, J 36995-3A, J 36995-1 and J 36995-8.
^ J 36995-8 assures that the rear bushing is installed in the engine block to the correct depth. The bushing will be installed properly when J 36995-8 and J 36995-1 fully contact the balance shaft bore or the cylinder block/transaxle mounting flange.
4. Remove J 36995 assembly.
5. Dip the front balance shaft bearing into clean engine oil before installation.
6. Balance shaft into block using J 36996 and J 21465-13.
7. Temporarily install balance shaft bearing retainer and bolts.
8. Balance shaft drive gear and bolt.
NOTICE: This bolt is designed to permanently stretch when tightened. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. Part or system damage may occur.
Tighten
^ Bolt to 22 N.m (16 lb. ft.) + 70° using J 36660.
9. Rear main oil seal housing. Refer to "Crankshaft Rear Main Oil Seal Housing�.
10. Measure balance shaft end play. Refer to "Specifications".
11. Measure balance shaft radial play at both the front and rear. Refer to "Specifications".
12. Turn the camshaft so that with the camshaft sprocket temporarily installed, timing mark is straight down.
13. With the camshaft sprocket and the camshaft gear removed, turn the balance shaft so that the timing mark on the gear points straight down.
14. Camshaft gear.
^ Align the marks on the balance shaft gear and the camshaft gear by turning the balance shaft.
15. Turn the crankshaft so that number one piston is at top dead center (TDC).
16. Timing chain and camshaft sprocket.
17. Measure gear lash at four places, every 1/4 turn. Refer to "Specifications".
18. Balance shaft front bearing retainer and bolts.
Tighten
^ Bolt to 30 N.m (22 lb. ft.).
19. Front cover.
20. Lifter guide retainer.
21. Lower intake manifold.
22. Flywheel.