Drive Belt Auto TENSIONER Inspection: Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing.

CAUTION:

If the rubber part of the drive belt auto tensioner is damaged by a screwdriver or other tool, oil in the hydraulic pressure unit could leak and the tensioner may not operate normally. Be careful not to damage the rubber part of the drive belt auto tensioner.

Fig 1: Rubber Part Damage Area Of Drive Belt Auto Tensioner

Courtesy of MAZDA MOTORS CORP.

NOTE:

Oil is sealed in the upper area of the rubber part and the piston groove shown in the figure.

Fig 2: Oil Sealed In Upper Area Of Rubber Part And Piston Groove

Courtesy of MAZDA MOTORS CORP.

If the internal pressure of the hydraulic pressure unit is the specified value or more, the internal pressure will escape from the groove. At this time, oil adhering to the inner wall may seep out, however, this does not indicate a malfunction.

Fig 3: Internal Pressure Of Hydraulic Pressure Unit

Courtesy of MAZDA MOTORS CORP.