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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1814 (Maintenance) >> Engine Maintenance >> Drive Belts >> Checking Drive Belts

Checking Drive Belts

WARNING: This page is about a different car, the 2006 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Be sure to perform when the engine is not running.
  1. Inspect the belts for cracks, fraying, wear, or oil contamination. If necessary, replace the belts with new ones.
  2. Inspect the belt deflection by applying 98 N (10 kg-f, 22 lb-f) on the belt midway between pulleys as shown.
  3. Measure the belt tension using commercial service tool at the belt locations as shown.

    Tool number: BT-3373-F 

    Fig 1: Checking Drive Belts
    G04201932Courtesy of NISSAN MOTOR CO., U.S.A.
    NOTE:
    • Inspect the belt deflection or tension when engine is cold.
    • Adjust if the belt deflection exceeds the limit or if belt tension is not within specifications.
    CAUTION:
    • When checking the belt deflection or tension immediately after installation, first adjust it to the specified value. Then, after turning the crankshaft two or more turns, readjust to the specified value to avoid variation in deflection between the pulleys.
    • Tighten the idler pulley lock nut by hand and measure deflection or tension without looseness.
      Fig 2: Tightening Idler Pulley Lock Nut
      G04201933Courtesy of NISSAN MOTOR CO., U.S.A.

Belt Deflection and Tension 

BELT DEFLECTION AND TENSION TABLE

  Deflection adjustment Unit: mm (in) Tension adjustment(1) Unit: N (kg-f, lb-f)
Used belt New belt Used belt New belt
Limit After adjustment Limit After adjustment
Generator and air conditioner compressor 7 (0.28) 4.2 - 4.6 (0.17 - 0.18) 3.7 - 4.1 (0.15 - 0.16) 294 (30, 66) 730 - 818
(74.5 - 83.5,
164 - 184)
838 - 926
(85.5 - 94.5,
188 - 208)
Power steering pump 11 (0.43) 7.3 - 8.0 (0.29 - 0.30) 6.5 - 7.2 (0.26 - 0.28) 196 (20, 44) 495 - 583
(50.5 - 59.5,
111 - 131)
603 - 691
(61.5 - 70.5,
135.6 - 155.4)
Applied pushing force 98 N (10 kg-f, 22 lb-f) -
(1) If belt tension gauge cannot be installed at check points shown, check drive belt tension at different location on the belt.