OEM Chrysler 300M Timing Belt

Chrysler 300M Timing Belt Parts and Q&A

• Timing Belt
  4792353
  Q: How to Safely Remove and Install a Timing Belt to Prevent Engine Damage on Chrysler 300M?

  A:

  If the camshaft sprockets are still tight, you do not have to perform an engine timing procedure; however, if they are loose, be prepared for one. Since the engines are not freewheeling, always keep the timing belt on when rotating the camshaft or Crankshaft. Separate the negative cable from the remote jumper first and after that remove the radiator upper crossmember, the radiator fan, all the accessory Drive Belts, the crankshaft vibration damper and the front timing belt covers. If you are planning to install the timing belt again, remember to mark its running direction. Set the engine so the crankshaft mark lines up with the TDC mark on the oil pump housing and so the camshaft sprocket timing marks are between those on the rear covers. Make sure that the two camshaft sprockets are both in the marks on the rear belt covers to avoid damaging the valves or pistons. Mark precisely where the camshaft sprocket timing mark sits in relation to the timing marks on the rear Timing Cover with an ink or paint pen. First, clear the tensioner and then the belt will be removed. As you work with the tensioner, slowly apply pressure so as not to damage it and put it in a vise while you are putting it on the engine. Push the plunger within the tensioner body and secure it using a pin until you are ready to fit it. When inspecting, open the timing belt covers and look at the belt from both sides for any hardening, cracks, missing teeth, peeling or damage in the form of unusual wear; if these are found, you should replace the belt. If everything is working with the belt, place the belt covers back as you did before. Be sure that the camshaft sprockets are not loose for installation. Make sure the TDC mark on the oil pump cover lines up with the crankshaft sprocket and that the removed camshaft sprocket indicates the same reference marks as they did before. Put the timing belt on the crankshaft sprocket facing backward, ensuring it is given enough pressure while passing through the tensioner pulley. Affix the tensioner into the housing, tighten it to 28 Nm (250 in. lbs.) and see that the camshaft sprocket marks are set between the marks on the cover. Take out the retaining pin, let the tensioner slide to the pulley bracket and rotate the crankshaft sprocket two complete revolutions. After that, check if all timing marks align correctly. Afterward, put on the front timing belt covers, attach the crankshaft vibration damper, place back the accessory drive belts, fasten the radiator fan and secure the upper radiator crossmember.