Mechanics

TIMING BELT TENSIONER

1991 Geo Metro

Engine Mechanical problem
1991 Geo Metro Two Wheel Drive Automatic 90000 miles

do you tighten the timing tensioner screw tight or do you leave it loose so the spring will be able to adjust the tension.
Also how tight do you get the timing belt?
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Wtcwire
February 16, 2009.



Below are the installation procedures for the timing belt. If you still need more assistance just let me know.

Install the tensioner plate to the tensioner.
Insert the lug of the tensioner plate into the hole of the tensioner.
Install the tensioner, tensioner plate and spring. Do not tighten the tensioner bolt and stud, make the bolt hand tight only.
Be sure that plate movement is installed in the proper direction that causes the same directional movement of the tensioner inner race. If no movement between the plate and inner race occurs remove the tensioner and plate again and reinsert the plate lug into the tensioner hole.

Check that the timing mark on the camshaft timing pulley is aligned with the V mark on the cylinder head cover. If not align the 2 marks by turning the camshaft by be careful not to turn it more than the allowable range.
Check that the punch mark on the crankshaft timing belt pulley is aligned with the arrow mark on the oil pump case. If not align the 2 marks by turning the camshaft by be careful not to turn it more than the allowable range.
With the 4 marks aligned, install the timing belt on the 2 pulleys in such a way that the arrow marks on the belt (if so equipped) coincide with the rotating direction of the crankshaft. In this state the No. 1 piston is at top dead center of its compression stroke.
Install the tensioner spring and spring damper. To allow the belt to be free of any slack, turn the crankshaft 2 rotations clockwise after installing the tensioner spring and damper. After removing the belt slack, first tighten the tensioner stud to 8 ft. Lbs. (11 Nm) and then the tensioner bolt to 20 ft. Lbs. (27 Nm).
As a final check, confirm that both sets of timing marks are aligned properly.

Ensure that the seal is between the water pump and the oil pump case. Install the timing belt outside cover. Torque the timing belt cover bolts to 8 ft. Lbs. (11 Nm).
Install the crankshaft pulley. Fit the keyway on the pulley to the key on the crank timing belt pulley and tighten the 4 bolts to 8 ft. Lbs. (11 Nm).
Lower the vehicle and install the negative battery cable.

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Bluelightnin6
Feb 16, 2009.