Timing Chain Installation Note

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Identifying Timing Chain Alignment Marks
Courtesy of MAZDA MOTORS CORP.
NOTE:
- The timing mark of SKYACTIV-G 2.5 is not completely parallel with the upper surface of the cylinder head.
- 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 each sprocket and the timing chain as shown in the figure.

Fig 2: Aligning Timing Marks On Each Sprocket And 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.
- If a new chain tensioner is used, remove the installed stopper.
Verify that there is no looseness in the timing chain, and re-verify that each sprocket is in the specified location.

Fig 3: Identifying Stopper And Link Plate
Courtesy of MAZDA MOTORS CORP.
Rotate the crankshaft clockwise two turns and inspect the valve timing.

Fig 4: Aligning Crankshaft Valve Timing Marks
Courtesy of MAZDA MOTORS CORP.
NOTE:
- The timing mark of SKYACTIV-G 2.5 is not completely parallel with the upper surface of the cylinder head.