Timing Chain Installation Note

Verify that the timing marks and the key are aligned to the position shown in the figure.

Fig 1: Checking Timing Marks And Key Alignment
Courtesy of MAZDA MOTORS CORP.
- If they are not in the position shown in the figure, rotate the camshaft and crankshaft to set the cylinder No. 1 top dead center (TDC).
Install the timing chain while aligning the marks on the timing chain as shown in the figure.

Fig 2: Aligning Marks On Timing Chain
Courtesy of MAZDA MOTORS CORP.
Install the chain guide (No. 1).
Install the tensioner arm.
Install the chain tensioner.
After installing the chain tensioner, remove the installed wire or paper clip, and then apply tension to the timing chain. (Chain tensioner type A)
- If a new chain tensioner is used, remove the installed stopper.
Fig 3: Stopper And Link Plate
Courtesy of MAZDA MOTORS CORP.
After installing the timing chain tensioner, remove the installed rod, and then apply tension to the timing chain. (Chain tensioner type B)
- If a new chain tensioner is used, remove the installed lock pin.
Fig 4: Lock Pin And Chain Tensioner
Courtesy of MAZDA MOTORS CORP.
Verify that there is no looseness in the timing chain, and re-verify that each sprocket is in the specified location.
Rotate the crankshaft clockwise two turns and inspect the valve timing.

Fig 5: Timing Mark On Cylinder Head Upper Surface

Courtesy of MAZDA MOTORS CORP.