Balance Shaft Chain: Service and Repair

Water Pump and Balance Shaft Chain Replacement

Removal Procedure

1. Remove the camshaft timing chain, sprocket, and tensioner. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement (Service and Repair).




2. Remove the adjustable balance shaft chain guide bolt and guide.




3. Remove the small balance shaft drive chain guide bolts and guide.




4. Remove the upper balance shaft drive chain guide bolts and guide.





Note: It may ease removal of the balance shaft drive chain to get all the slack in the chain between the crankshaft and water pump sprockets.

5. Remove the balance shaft drive chain (7).
6. Remove the balance shaft drive sprocket.

Installation Procedure




1. Install the balance shaft drive sprocket (3).

Note: If the balance shafts are not properly timed to the engine, the engine may vibrate or make noise.

2. Install the balance shaft drive chain (7) with the colored link lined up with the marks on the balance shaft sprockets and the balance shaft drive sprocket. There are 3 colored links on the chain. Two are chrome and one is copper. Use the following steps in order to line up the links with the sprockets.

* Place the copper link (5) so that it lines up with the timing mark (2) on the intake side balance shaft sprocket.
* Working clockwise around the chain, place the chrome link (4) in line with the timing mark (3) on the balance shaft drive sprocket (approximately 6 o'clock position on the sprocket).
* Place the chain (7) on the water pump drive sprocket. The alignment is not critical.
* Align the last chrome link (6) with the timing mark (1) on the exhaust side balance shaft drive sprocket.

Caution: Refer to Fastener Caution (Fastener Caution).




3. Install the upper balance shaft drive chain guide and bolts and tighten to 15 Nm (11 lb ft).




4. Install the small balance shaft drive chain guide and bolts and tighten to 15 Nm (11 lb ft).




5. Install the adjustable balance shaft chain guide and bolt and tighten to 10 Nm (89 lb in).




6. Reset the timing chain tensioner by performing the following steps:

* Rotate the tensioner plunger 90 degrees in its bore and compress the plunger.
* Rotate the tensioner back to the original 12 o'clock position and insert a paper clip through the hole in the plunger body and into the hose in the tensioner plunger.

7. Install the balance shaft drive chain tensioner and bolts and tighten to 10 Nm (89 lb in).
8. Remove the paper clip from the balance shaft drive chain tensioner.
9. Install the camshaft timing chain, sprocket, and tensioner. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement (Service and Repair).