OEM Chrysler 300M Cam Gear

Chrysler 300M Cam Gear Parts and Q&A

• Camshaft Gear, Driver Side
  4792224
  Q: How to Remove and Replace the Cam Gear on 3.2/3.5L Engines on Chrysler 300M?

  A:

  Drain the radiator, remove the Drive Belts and take off the crankshaft damper and Timing Belt covers as well as the timing belt for removing and changing the camshaft gear/sprocket on these engines. Do not attempt to rotate the camshafts or crankshafts when the timing belt is removed, as the engine won't start freely. After undoing or removing the camshaft sprocket bolts, the camshafts have to be re-timed and you should not reuse the bolts. Place a 36 mm (1 7/16 inch) box wrench on the camshaft sprocket to secure it, then use a socket to unscrew and remove the bolt and washer; lifting that section of the engine may sometimes help because the bolts are so long (213 mm (8 3/8 inch) for the right and 255 mm (10.0 inch) for the left). Remove the camshaft sprocket, making sure it aligns properly with the engine, being sure it is timed correctly. To time the engine, connect the oil pump sprocket at the top dead center on the housing and then use a dial indicator in cylinder number 1 to see if it is at TDC. Using a crankshaft, align the piston on TDC and next, put in Special Tools 6642 into the rear of every cylinder head. With a gentle pull, adjust the tensioner in a vice and add the locking pin before setting aside the tensioner so the plunger is facing up. Attach both sprockets to the camshafts using new bolts: 255 mm (10 inch) for the left and 213 mm (8 3/8 inch) for the right, so the sprocket marks sit between the cover marks. Adjust the timing belt clockwise in order to fit it around the tensioner pulley, making sure there is tension as you put it on. Slide the tensioner into the housing and tighten to 28 Nm or 250 in. lbs., then pull the retaining pin so the tensioner extends out. Place the camshaft sprocket hex inside the number 1 piston and tighten the camshaft bolts to 75 ft. lb. for the right and 85 ft. lb. for the left, each with a 90° turn after you reach 102 Nm and 115 Nm respectively. First, take off the dial indicator, place the new spark plug and lastly, remove the alignment Special Tools 6642. Cover your cams and O-rings, secure all the fastening bolts at 28 Nm (250 in-lbs), then install the remaining covers, the crankshaft damper and the other drive belts. After filling the cooling system, begin the engine and let it run without moving for about 1 minute. If you can hear a strong noise coming from the timing belt or tensioner, air may be inside the tensioner; run the engine at 1600-2000 RPM for 10 minutes with a DRB III to remove the air. In case air is present, the tensioner will feel spongy and whistle, but these symptoms should go away after your engine has run for 15 minutes or less.
• Camshaft Gear, Driver Side
  4792580AA
  Q: How to Maintain and Fix a Cam Gear on Chrysler 300M?

  A:

  The first step in working with the camshaft gear/sprocket is to take apart the front Timing Belt covers. Do this step by rotating the crankshaft CCW until the crankshaft sprocket falls at the TDC mark on the oil pump housing. Set a dial indicator in the number 1 cylinder at TDC to check the Piston, then take out the camshaft retainer/thrust plates from the back of the cylinder heads and get to the right side plate by removing the EGR Valve. Insert the pin from Special Tool 6642 into the pilot hole on the camshaft and attach the bolts to the retainer plate; if alignment is bad, remove the Timing Belt Tensioner, rotate the camshaft until the bolts can be fitted and do not install the tensioner. Following this, take out the timing belt and hold the camshaft sprocket using a 36 mm box end wrench when loosening and removing both bolts and washers. Detach the camshaft sprockets and be sure they are not reversible from one side to the other. During installation, slide the new sprockets onto the camshafts and insert the new bolts without tightening, so that the sprocket marks are set between the marks you see on the cover. Always install the timing belt around the front of the crankshaft sprocket and move it counterclockwise with pressure on the tensioner pulley. Secure the tensioner pulley against the belt and attach the reset timing belt tensioner, screwing the bolts until the tension is 28 Nm. Drop the tensioner retaining pin, use a dial indicator to put number 1 piston at TDC and finish by tightening the right camshaft bolts to 102 Nm after a 90° turn and the left ones to 115 Nm after the same turn. When you finish with the dial indicator, install the spark plug, then remove Special Tool 6642 and attach the cam retainer/thrust plates and O-rings, fastening all the bolts to 28 Nm. Once all that is done, fit the timing belt covers, crankshaft vibration damper and accessory Drive Belts and finish by filling the cooling system.