Oil Pump Chain Installation Note

Verify that the key and knock pin are aligned to the positions shown in the figure.

Fig 1: Identifying Key And Knock Pin Aligned Positions
Courtesy of MAZDA MOTORS CORP.
- If they are not in the positions shown in the figure, rotate the crankshaft and balancer shaft (No. 1) to set cylinder No. 1 to top dead center (TDC).
Temporarily assemble the oil pump driven sprocket.
Temporarily tighten the oil pump driven sprocket installation bolt.
Align the oil pump chain alignment mark with the balancer shaft sprocket alignment mark.

Fig 2: Aligning Oil Pump Chain Alignment Mark With Balancer Shaft Sprocket Alignment Mark
Courtesy of MAZDA MOTORS CORP.
Install the oil pump chain and balancer shaft sprocket as a single unit while aligning the alignment marks on each sprocket and oil pump chain as shown in the figure.

Fig 3: Identifying Oil Pump Chain And Oil Pump Drive Sprocket Alignment Mark, Balancer Shaft Sprocket And Oil Pump Chain Alignment Mark
Courtesy of MAZDA MOTORS CORP.
Temporarily tighten the balancer shaft sprocket installation bolt.
Install the oil pump chain tensioner.
CAUTION:
- At this stage, do not remove the wire or paper clip installed to the oil pump chain tensioner.
Tighten the oil pump driven sprocket and balancer shaft sprocket installation bolts using the following procedure:
1. Temporarily assemble the crankshaft sprocket, crankshaft pulley and crankshaft pulley lock bolt.
  CAUTION:
  - To prevent damage to the crankshaft pulley, protect the crankshaft pulley with a clean cloth so that the bar part (205-072) of the SST does not contact the crankshaft pulley.
2. Install the SST as shown in the figure and lock the oil pump and balancer unit against rotation.
  
  Fig 4: Locking Oil Pump And Balancer Unit Against Rotation
  Courtesy of MAZDA MOTORS CORP.
3. Tighten the oil pump driven sprocket installation bolt.
  - 20-30 N.m {2.1-3.0 kgf.m, 15-22 ft.lbf}
4. Tighten the balancer shaft sprocket installation bolt.
  - 38-46 N.m {3.9-4.6 kgf.m, 29-33 ft.lbf}
Remove the SSTs .
Remove the temporarily assembled crankshaft sprocket, crankshaft pulley and crankshaft pulley lock bolt.
Remove the wire or paper clip installed to the oil pump chain tensioner and apply tension to the oil pump chain.
- If a new oil pump chain tensioner is used, remove the installed stopper.