Inspection Of Timing Belt Components


• Do not bend, twist or turn the timing belt inside out.

• Do not allow the timing belt to come into contact with oil, water or steam.

• Do not utilize timing belt tension when installing or removing the mount bolt of the camshaft timing pulley.

If there are any defects as shown in the illustrations, check the following points:

(a) Premature parting

• Check for proper installation.

• Check the timing cover gasket for damage and proper installation.

(b) If the belt teeth are cracked or damaged, check to see if either the camshaft or water pump is locked.

(c) If there is noticeable wear or cracks on the belt face, check to see if there are nicks on the side of the idler pulley lock.


(d) If there is wear or damage on only one side of the belt, check the belt guide and the alignment of each pulley.


(e) If there is noticeable wear on the belt teeth, check the timing cover for damage, correct gasket installation and foreign material on the pulley teeth.

If necessary, replace the timing belt.



Check the turning smoothness of the idler pulley. If necessary, replace the idler pulley.


(a) Visually check tensioner for oil leakage.

HINT: If there is only a small trace of oil on the seal of the push rod, the tensioner is all right.

If leakage is found, replace the tensioner.

(b) Hold the tensioner with both hands, and push the push rod strongly againt the floor or wall to check that it doesn't move.

If the push rod moves, replace the tensioner.

(c) Measure the protrusion of the push rod from the housing end.

If the protrusion is not as specified, replace the tensioner.

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    How to check timing on 1991 mr2?
    8 years ago
  • Lotho
    How to check mr2 timing belt?
    8 years ago

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