The timing belt on a Nissan Pathfinder should be changed every 105,000 miles; however, changes may be necessary before reaching that milestone. When changing the timing belt, it is also a good time to replace other parts on the SUV. If the timing belt does break, there will be bends to at least two valves. Changing the timing belt is a relatively difficult task that can be completed by a novice but takes some patience to do so.
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Things you need
- Jack stands
- Allen wrench
- Paint pen
Jack up the Pathfinder and support it on jack stands. Remove the radiator shroud, lower engine shield, air intake tube on the valve cover, cooling fan, A/C idler pulley, accessory belts and thermostat water hose, using the appropriate-sized wrenches.
Remove the crankshaft pulley bolt and the crankshaft pulley. Then remove all the belt covers from the top and bottom. When all the timing belt covers are removed, screw the crankshaft pulley back in. Use a ratchet to remove the crankshaft pulley.
Turn the engine over by hand until the marks on all three pulleys are close to the marks on the rear timing belt covers. Mark the old belt with a white paint pen so it lines up with the dots on the cranks and cam pulleys. Then transfer the markings over to the new belt for an exact duplication.
Loosen the timing belt tensioner nut by turning it clockwise with an Allen wrench. Then tighten the tensioner nut and remove the timing belt. Check to make sure everything still lines up then wrap the timing belt around the camshafts.
Loosen the tensioner nut using the Allen wrench to keep the tensioner from moving. Then temporarily tighten the tensioner nut and turn the crankshaft clockwise two complete turns. Make sure the timing marks are lined up at the end of the second turn.
Check the installation of the belt again to make sure everything lines up. Then adjust the belt tension to the specifications depending on the year of the SUV. Turn the crankshaft clockwise so the feeler gauge moves up to the 1 o'clock position on the tensioner pulley. Then remove the feeler gauge by turning the crankshaft clockwise.
Remove the crankshaft pulley bolt then put back all of the removed items in the order they were taken off. Start the engine to make sure the belt is properly working.
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