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#1
04-10-2008, 05:42 PM
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Causes of low indicated oil pressure at idle?
I thought it has to do with the O rings deteriorating on the filter shaft. Or the shaft itself sludged up. This is occuring on engines that rise to three bar quite easily. Yet idle at around .3 bar. I suspect the engines are not worn out either.
Could not locate something quick in the archives although I think it's there somewhere. 
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#2
04-10-2008, 10:06 PM
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Name the vehicle you are talking about.
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#3
04-10-2008, 10:09 PM
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Mine read real low when the oil pressure sender was failing. A new sender fixed the issue.
Edit: looks like he's talking about a W123....so its probably an accurate reading....
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#4
04-10-2008, 10:58 PM
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Quote:
 Sorry gentlemen I was not thinking.
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#5
04-10-2008, 11:10 PM
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Low idle pressure adequate pressure at higher rpm.
On many engines: Worn bearings (excessive clearances), oil dilution with fuel or coolant (leading to worn bearings), sticking/scored oil pump relief valve (or weak spring), oil overheated (oil cooler thermostat did not open no oil circulating through cooler), engine overheating that causes oil overheating, oil pump worn, engine idle rpm set to low, and?
__________________
84 300D, 82 Volvo 244Gl Diesel Last edited by Diesel911; 04-10-2008 at 11:16 PM.
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#6
04-10-2008, 11:14 PM
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My 603 exhibits this behavior ONLY after long, hard, hot runs on hot days.
__________________
 ~Michael S.~ Past cars: 1986 300SDL 1987 300SDL 1982 240D 1982 300SD Current: 1987 300SDL
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#7
04-10-2008, 11:15 PM
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Incorrect or defective oil filter might do that.
__________________
Palangi 2004 C240 Wagon 203.261 Baby Benz 2008 ML320 CDI Highway Cruiser 2006 Toyota Prius, Saving the Planet @ 48 mpg 2000 F-150, Destroying the Planet @ 20 mpg TRUMP .......... WHITEHOUSE HILLARY .........JAILHOUSE BERNIE .......... NUTHOUSE 0BAMA .......... OUTHOUSE
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#8
04-10-2008, 11:40 PM
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On these old engines I run straight 40 wt Delo 400... for exactly the worn , increased bearing clearance...
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#9
04-11-2008, 12:53 AM
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Quote:
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Linear Mode
