We just installed a 1995 AMG'd M104 engine and started it up.

Once the vaccuum cleaner sound of the air pump during a cold startup is gone, we noticed that as the engine got warmer, the valve assembly started to give-off a sound like a diesel's klattar-klattar.

I nor my MB tech remembers how an AMG'd M104/C36 engine sounds like, so we want to know if this sound is normal?

Thanks in advance,

:-) neil
1988 300TE w/AMG'd M104 engine, aka AMG C36