Lifter sound issues

I have a 1995 740iL BMW with a M62 series engine. I am getting a tapping noise in my lifter area on the drivers side of the engine. We thought we had collapsed lifters, but we replaced all 16 on that side.
I took it to the BMW dealer and all they could tell me is what i thought it was. They had no other ideas on what could be making this sound.
We checked the cranshaft and also pushed down on the rods while they in the engine. All of the springs compressed down, so the springs seem good.
When the engine runs it sounds like a deasel, and the sound is defenitley on the entire drivers side head bank.
Any ideas on what could be causing this anyone?
_Bic
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
snipped-for-privacy@gmail.com wrote:

Low oil pressure may do it. But it's amazing just how similar a blowing exhaust manifold gasket and lifter noise are.
--
Who needs a life when you've got Unix? :-)
Email: snipped-for-privacy@unixnerd.demon.co.uk, John G.Burns B.Eng, Bonny Scotland
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Don't forget that that engine had oil pump bolt problems - see http://www.strictlybmw.com/newsletter/importantnotices/v8oilpump.htm However, since it's (apparently) only one side, I wouldn't think it would be oil pressure...
FloydR
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.