Genuine Jeep Wrangler Timing Belt

Jeep Wrangler Timing Belt Parts Questions & Experts Answers

• Timing Belt
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  Q: How to replace the timing belt and ensure proper alignment of the camshaft and crankshaft sprockets in 2.4L four cylinder engine on Jeep Wrangler?

  A:

  Position the number one piston at Top Dead Center and disconnect the cable from the negative terminal of the battery. Remove the air filter housing and tube, followed by the drivebelt. Set the parking brake, block the rear wheels, raise the front of the vehicle, and support it securely on jackstands. Remove the drivebelt splash shield from underneath the vehicle. Loosen the large bolt in the center of the crankshaft damper pulley, using a large screwdriver or bar to keep the pulley stationary while loosening the bolt with a socket and breaker bar. Install a 3-jaw puller onto the damper pulley to remove it from the crankshaft, ensuring to use the proper insert to avoid damaging the crankshaft threads. If the pulley is difficult to remove, tap the center bolt of the puller with a brass mallet. Remove the drive belt tensioner and pulley assembly located below the alternator, then remove the lower and upper timing belt cover bolts and covers. Before removing the timing belt, ensure that the camshaft timing marks and the TDC mark on the crankshaft timing belt sprocket are aligned with the stationary index mark on the oil pump housing. Release tension on the timing belt by inserting a 1/4-inch Allen wrench into the belt tensioner and using a 1/8-inch Allen wrench to lock it in place. Carefully slip the timing belt off the sprockets and set it aside, placing it in a plastic bag if planning to reuse it. Rotate the tensioner pulley and idler pulley by hand to check for roughness and excess play, replacing parts as necessary, and visually inspect the sprockets for damage and wear. Inspect the timing belt for cracks, separation, wear, missing teeth, and oil contamination, replacing it if in questionable condition. Check the automatic tensioner for leaks or damage, ensuring the TDC mark on the crankshaft timing belt sprocket remains aligned with the stationary index mark on the oil pump housing. Turn the exhaust camshaft sprocket clockwise until its timing mark is slightly below the timing mark on the intake camshaft sprocket. Install the timing belt starting at the crankshaft sprocket, threading it onto the water pump sprocket, idler pulley, camshaft sprockets, and finally the tensioner, taking up tension by moving the exhaust camshaft sprocket counterclockwise until the timing marks are realigned. Use a 6 mm Allen wrench to rotate the belt tensioner counterclockwise until tension is applied to the timing belt, aligning the setting notch with the spring tang, then torque the tensioner bolt and recheck the alignment marks. Rotate the crankshaft 720 degrees to verify that the TDC marks and camshaft sprocket timing marks remain aligned; if not, reinstall the belt. Install the upper and lower timing belt covers, tighten the fasteners, install the drivebelt idler pulley, and tighten the idler pulley bolt. Finally, install the crankshaft vibration damper, washer, and pulley bolt, tightening the pulley bolt to the specified torque, with the remainder of the installation being the reverse of removal.