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#2
08-12-2007, 09:36 PM
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It is normal for oil pressure to be between 1 and 2 bar at warm idle, and should slam up to 3 bar fairly quickly as you raise the RPM.
-sam
__________________
"That f***in' biodiesel is makin' me hungry." 1982 300TD Astral Silver w/ 250k (BIO BNZ) 2001 Aprilia SR50 Corsa Red w/ 5.5k (>100 MPG) 
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#3
08-12-2007, 09:37 PM
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No, you need a new engine!
 Just kidding.  It's 100% normal.
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#4
08-12-2007, 09:37 PM
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1 sounds low at idle. Is this at full operating temperature?
__________________
DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 
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#5
08-12-2007, 09:40 PM
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Oil pressure at idle should be 3 when the engine is cold. When the engine warms up and is idling it should be between 1 and 2. If it stays at 3 all the time your idle rpm might be too high.
__________________
Andrew '04 Jetta TDI Wagon  '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#6
08-12-2007, 09:42 PM
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I've never had a MB that idled with less than 1.5 on the gauge.
__________________
DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012
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#7
08-13-2007, 12:14 AM
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Spec is 3bar by 3k rpm.
Min @ hot idle is .3 bar.
__________________
1999 SL500 2016 Ram 1500 2007 Tiara 3200
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#8
08-13-2007, 11:44 AM
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i was going to post this
I am around 1.6-1.75 or so at idle. It pegs out as soon as I am on the go pedal, and it drops pretty quick when I come off the pedal to begin braking....I have read you watch the speed at which it drops when you come off the pedal to determine the health of the engine. A quick drop isn't as good as a slow steady drop to idle.
However, shamefully I have been using the wrong weight Mobil 1 synthetic oil, and will change that in a few miles. Will that possibly change my pressure?
__________________
85 300CD Turbo "Das Polluter" 230K sold for $3,000 98 BMW 323is
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#9
08-13-2007, 12:34 PM
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It can.
__________________
RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 06 VW Jetta TDI 133K miles-replaced the other '06 that quit after 300k miles. (did not catch the bad cam in time) 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 195K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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#10
08-13-2007, 09:48 PM
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I know it is at 3 during hot running. I'll check the cold and hot during Idle and let you know. I know I have had differences in oil pressure using different brands of oil filters as well.
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1990 300d 2.5 new to me.
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#11
08-13-2007, 10:25 PM
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Mine idles at about 0 to .3 on a hot day. If its really hot and I come off the freeway it sits at 0. When cold its at 3. When I accelerate it goes to 3. My problem is my oil pressure sender....its dying. It jitters and skips a lot too when I am slowing down. Oh well....I'll replace it when it fully breaks.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 110k - mine - (OC-112,500) '17 Metris(VITO!) - 30k - wifes (OC-34k) '09 Sprinter 3500 Winnebago View - 61k (OC - 63k) '13 ML350 Bluetec - 84k - dad's (OC-86k) '01 SL500 - 99k(km) - dad's (OC-102,000km) '16 E400 4matic Sedan - 136k - Brothers (OC-139k)
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#12
08-14-2007, 12:35 AM
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Quote:
__________________
DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012
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