DRIVE BELT AUTO TENSIONER INSPECTION [SKYACTIV-X 2.0]

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Warning
•  A hot engine can cause severe burns. Turn off the engine and wait until it is cool before inspecting the drive belt auto tensioner.
Caution
•  If the rubber part of the drive belt auto tensioner is damaged, oil inside the hydraulic unit may leak out and the tensioner may not operate normally. Therefore, be careful not to damage the rubber part of the drive belt auto tensioner.
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Hydraulic Pressure Unit Inspection

Step

Inspection

Results

Action
1
PURPOSE: INSPECT CONDITION OF RUBBER PART OF DRIVE BELT AUTO TENSIONER
•  Is oil seeping out from the upper or lower side of the rubber part?
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Yes
Go to the next step.
No
The hydraulic pressure unit is normal, therefore the inspection is completed.
2
PURPOSE: INSPECT CONDITION OF RUBBER PART OF DRIVE BELT AUTO TENSIONER
•  Wipe off any dust or oil on the surface of the rubber part.
•  Visually inspect the rubber part for damage or separation.
•  Is the rubber part damaged?
Yes
Replace the drive belt auto tensioner because the rubber part is damaged and there is oil leakage.
(See DRIVE BELT AUTO TENSIONER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
No
Go to the next step.
3
PURPOSE: INSPECT CONDITION OF HYDRAULIC PRESSURE UNIT OF DRIVE BELT AUTO TENSIONER
•  Attach a wrench to the cast hexagon part of the drive belt auto tensioner.
•  Apply force to the wrench to force the drive belt auto tensioner to stroke.
•  Does the resistance increase when the drive belt auto tensioner compresses, and decrease when it expands?
Yes
Verify that the drive belt assembly condition is normal, then go to the next step.
No
Resistance is high in up and down directions:
•  Replace the drive belt auto tensioner due to hydraulic pressure unit damage or rotation axis damage.
Resistance is low in up and down directions:
•  Replace the drive belt auto tensioner due to oil leakage or functional part damage.
4
PURPOSE: INSPECT CONDITION OF RUBBER PART OF DRIVE BELT AUTO TENSIONER
•  Is oil seeping out from the upper or lower side of the rubber part?
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Yes
Oil is leaking from upper side:
•  The hydraulic pressure unit is normal, therefore the inspection is completed.
Oil is leaking from lower side:
•  Replace the drive belt auto tensioner due to a poor seal on the rubber part.
No
The hydraulic pressure unit is normal, therefore the inspection is completed.


Pulley Inspection

1.  Remove the water pump drive belt. (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

2.  Rotate the drive belt auto tensioner pulley by hand and verify that it rotates smoothly.

•  If it does not rotate smoothly, replace the drive belt auto tensioner. (See DRIVE BELT AUTO TENSIONER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

3.  Inspect the contact surface of the drive belt auto tensioner pulley belt and verify that the height difference is less than the maximum specification.

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•  If it is the maximum specification or more, replace the drive belt auto tensioner. (See DRIVE BELT AUTO TENSIONER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

4.  Install the water pump drive belt. (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)