One of the points I've finally gotten MY head around is that 0.3 bar at
idle and 3 Bar at 3000 rpm and above are MINIMUM specs that will assure
acceptable minimal or no engine wear (with approved oil). Those numbers
are NOT "normal" pressure, but the lower and upper limits of adequate.
Normally pressure will usually approach 3 bar at between 1200-1500 rpm,
at rpm much above 3500 rpm the pressure relief will open holding the max
at ~5.8 bar and hot idle will usually run between 1-2 bar, but these
numbers are highly variable and not just oil type (full synthetics will
have lower cold and higher hot oil pressure than an equivalently rated
hydrocracked or dino oil) and viscosity but other factors (e.g. precise
idle speed, soot load, oil filter cover stem "O" ring condition, etc.)
influence these numbers so making meaningful comparisons except at the
extremes is difficult.
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 181Kmi,'87 190D 2.5 199Kmi, '84 190D 2.2 227Kmi, '85 190D 2.0
159Kmi, '87 190D 2.5 turbo 234kmi
Diesel Technical Advisor MBCA, member GWSection
http://www.dhc.net/~pmhack/mercedes/mbooth1.htm
