Reply to Thread

+2

Thanks, I agree and I'll post shortly with ..my .

hypothesis.

John

My out-of-the-blue thoughts...

Well, I've got an S52 (no issues - hydraulic).

But, with the S54's solid lifters...
If the clearances are too wide, there can be noise - you know, clickety-clack, somewhat irregularly if they're not all even. Possibly somewhat reduced power at high rpms. Possibly higher wear on components.

As for too tight clearances, I just rebuilt the head on my e30 and did the old eccentric-cam rocker adjustments.
Symptoms there were a *very* irregular idle and *no* valve tapping noises. Valves were too tight from the machine shop (<.008"). Adjusted to .012 all around and idle is now butter smooth.

hope this helps. i know it's a bit off-mark for you, given engine differences.

<IMG SRC=http://mydrive.roadfly.com/photos/pic.php?u=73302r2fUS&i=2642><FONT FACE="Comic Sans MS" COLOR=Gray SIZE=+1>PaulR</FONT>
<FONT COLOR=Black>'CCA Memb #8743
'99 M-Coupe - Silver/Black
'85 325e - my "Ol' Paint"
'96 VFR750F - smoooth
'86 Ducati 750-F1 - raw</FONT>

Symptoms of valves needing adjustment on an S54??

I'm developing a hypothesis that I'll share later. Minor and Major symptoms, if you know..

Thanks,

John