Re: Spam:******, [Chrysler300] valve train oiling on my 392

["George Riehl" <longrams@xxxxxxxxxxxxx>]

Hi Dennis:  Having worked on many hemi's thru the years, have found that when a shop "hot tanks" the rocker arms with (with or without) the end "plugs" removed, there is still "gunk" inside. I use a 12ga. shotgun brass brush attached to a rod and "swab" out the shaft to get it clean. But there is also more to do. The small holes in the shaft that feed the rockers must be cleaned out with a fine wire or a small drill by hand. The brush does not get into the holes. Generally, they are plugged solid. The next step is to use a small wire and clean out the rocker arm oiling passages, usually pluged solid. This should complete and restore oiling to the rockers and to the tips of the rocker arm and valve stem tip. As another IMPORTANT note, none of the 300 hemis use valve stem seals. Only the New Yorker and Imperial hemis use them.  With the three coil valve spring that is used on the 300 hemi, there is no room to install a valve stem seal. The valve stem will get some very slight oiling and causes no problem. The valve spring "shrouds" the stem very well. Also, the "oiling" stand (that feeds the shafts) must be cleaned completely. 
  I have "opened" some hemis that had been worked on in prior years that have had New Yorker valve springs (one coil) and vlave stem seals installed thru the ignorance of some rebuilder. In some of these engines, valve spring breakage was ever present. 
  On the other question about the "drain-back valve" under the rear main cap, some shops "loose" the 3 part valve by not knowing it is there during the hot tanking. It "falls" out into the bottom of the tank. I generally replace that valve with a one piece assembly so that ALL the oil from the pump goes thru the filter. The original factory valve is of "by-pass" type.  This replacement valve can be orederd from PAW under part number HEM-5340 at a price of $19.95. A great investment, peace of mind. It also increases oil pressure slightly. 
   George Riehl




  ----- Original Message ----- 
  From: dennis57300@xxxxxxx 
  To: Chrysler300@xxxxxxxxxxxxxxx 
  Sent: Thursday, April 10, 2008 10:19 PM
  Subject: Spam:******, [Chrysler300] valve train oiling on my 392


  ever since i first fired my hemi ive had trouble with getting oil to the 
  rockers. sent it back to the motor shop to re-clean the rockers. found crap in 
  the oil passages not blown out after the hot tank. the dino went without a 
  hitch but after pulling the valve covers found valves sparcely oiled. going to 
  have it torn down tomorow first to see if the holes in the cam bearing is lined 
  up in the block and possibly sending the cam out to be turned so the heads 
  will get oil on the whole rotation of the cam. has anyone had this problem and 
  what was the remedy?

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