Camshaft Inspection: Notes

WARNING: This page is about a different car, the 2007 Mazda B3000, 2006 Mazda B3000, 2005 Mazda B3000, 2004 Mazda B3000, and 2003 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.

Inspect camshaft lobes for pitting or damage in the active area. Minor pitting is acceptable outside the active area.

Fig 1: Inspecting Camshaft Lobes
Courtesy of MAZDA MOTORS CORP.
Measure diameter (A) and diameter (B) with a vernier caliper. The difference in measurements is the lobe lift.

Fig 2: Measuring Camshaft Lobes
Courtesy of MAZDA MOTORS CORP.
Measure each side of the lobe for even wear.

Fig 3: Measuring Each Side Of Lobe
Courtesy of MAZDA MOTORS CORP.

NOTE:

Camshaft journals must be within specifications before checking runout.

Fig 4: Measuring Camshaft Runout

Courtesy of MAZDA MOTORS CORP.

Use the Dial Indicator With Bracketry to measure the camshaft runout.
1. Rotate the camshaft and subtract the lowest dial indicator reading from the highest dial indicator reading. Refer to SPECIFICATIONS .