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NA

NA Belt Tension

Original Author: Phil Barnett (prb) - 2013

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Timing Belt

After insuring the alignment of the belt timing marks at TDC, rotate the crankshaft 1 5/6th turns to the tension setting mark. Loosen the tensioner bolt and allow the spring to pull the tensioner into the belt. Tighten the tensioner bolt to 28-38 Ft/Lbs or 38-51 Newton/Meters. Press down in the center of the belt between the two camshaft pulleys with a force of 22 Lbs (98 Newtons). The belt should deflect .36 to .45 inches (9-11.5 mm). If the belt does not deflect in this range start back at TDC and repeat the process until the correct deflection is attained.

Alternator, A/C and Power Steering Ribbed Belts

Check the drive belt tension when the engine is cold or at least 30 minutes after the engine has stopped. Apply moderate pressure 98N (10kg, 22lbs) midway between the specified pulleys.

To check deflection on the alternator belt press between the crankshaft and alternator.

To check deflection on the AC, PS or AC+PS belt press between the crankshaft and the PS or Idler.

Deflection mm (in)
Drive BeltNew*UsedLimit
Alternator5.5-7.0 (0.22-0.27)6.0-7.5 (0.24-0.29)8.0 (0.31)
PS PS+AC8.0-9.0 (0.32-0.35) 9.0-10.0 (0.36-0.39)11.5 (0.45)
AC8.0-9.0 (0.32-0.35) 9.0-10.0 (0.36-0.39)11.5 (0.45)

  • A belt that has been on an engine less than 5 minutes.

If the deflection is not within the specification, adjust it.

Belt tension can be checked in place of belt deflection. Check the drive belt tension when the drive belt is cold or at least 30 minutes after the engine has stopped. Using a belt tension tester, check the belt tension between any two belt pulleys.

Tension N (kg, lb)
Drive BeltNew*UsedLimit
Alternator491-745 (50-76,110-167)491-706(50-72,110-158)343(35,77)
PS PS+AC491-588 (50-60, 110-132)422-490 (43-50, 95-110)245 (25, 55)
AC491-588 (50-60, 110-132)422-490 (43-50,95-110)245 (25,55)

  • A belt that has been on an engine less than 5 minutes.