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#1
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Constant oil pressure
I was in the Tech section where this question was posted, and I have the same question. In my '72 the oil pressure gauge always reads 3 bar. Even when fully warmed up, at idle, in warm wheather (yes, I mean fully warmed-up).
I think the gauge functions correctly as there is a short delay before it climbs up when starting, and the delay is longer after an oil change. The motor runs well, with no leaks, blow-by, or smoking, and the thermostat is working correctly. I just thought I'd throw this out there, TIA for your comments.
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1992 500SEL 25K 1995 E320 40K 1995 SL600 120K 2002 JX8 Sport 43K 2005 Volvo S40 95K 2006 Isuzu NPR 304K (Frankencamper) 2007 Crown Victoria 150K 2014 Smart Electric 20K |
#2
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More important is how quickly it climbs when you tap the accelerator.
My 240D (117k miles) idles at/near 17lbs idling..... about 1/3 from bottom of guage. It dips from full pressure, pegged at 45lbs, when shifting gears - otherwise always stays pegged while driving. MB says the cars can idle at 7lbs. pressure without problem. My guage shakes like leaf at 15lbs after driving hard at high speeds. Btw, this is on Mobile 1 synthetic oil..... if you are using dino oil, Harley Davidson shops carry straight 40 or 50 wt for Summer driving. Cant think of anything that might screw up the guage, unless you've got slime deposits on the sending unit or the guage sticks behind the instrument cluster.
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'80 300SD/ w116 '79 240D 4-spd '71 750cc Guzzi previously owned: '83 240D 4-spd '77 280SEL 4-spd '74 280/8 '72 250/8 '65 220Sb 4-spd '63 220Sb 4-spd '63 190c 4-spd '61 220Sb 4-spd '60 190b 4-spd |
#3
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Sorry DieselDog, my post was strangely worded. My gauge goes all the way to the top (3 bars, or 45psi) on start-up in about 2 seconds; then the needle stays at the top under any condition (even at idle, when hot). As soon as I shut down, the needle drops to zero without delay. After an oil change the needle takes about 4 seconds to climb to the top. I use a dino 15w-40, and change it every 2,000 miles. I'm hoping this post clarifies, not clouds the situation.
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1992 500SEL 25K 1995 E320 40K 1995 SL600 120K 2002 JX8 Sport 43K 2005 Volvo S40 95K 2006 Isuzu NPR 304K (Frankencamper) 2007 Crown Victoria 150K 2014 Smart Electric 20K |
#4
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I say you have nothing to worry about.... Looks like you have a healthy lower end. Every MBZ that I have ever been in woul;d peg the guage at start-up and quite a few stayed there.
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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle. |
#5
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If it shoot to the top and stays there, then your car is running great!
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