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#1
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oil pressure reading w/key in glow position?
When turning key to the glow position, is it normal for my oil pressure indicator to jump to above zero, or is my sender going bad? This is on the 92 300D. Thanks!
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1992 300D 2.5T 1980 Euro 300D (sadly, sold) 1998 Jetta TDI, 132K "Rudy" 1974 Triumph TR6 1999 Saab 9-5 wagon (wife's) |
#2
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is the sensor electrical or mechanical?
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#3
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I believe that mine goes full-scale when I turn on the key, back to normal when it starts.
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Gone to the dark side - Jeff |
#4
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I've always been curious about this with regard to the SD. It jumps up to 1.0 in the glow position. It makes me wonder if the running position is accurate.
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#5
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afaik It should sit on 0 untill running, thats what all of mine do...
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1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350 |
#6
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Quote:
All of the w124 mercedes Ive driven do that so its most likely normal.
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1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
#7
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My 124 car's oil pressure electric gauge stays at zero until the pressure builds up. It's actually faster responding than my 123 car since the latter has a mechanical gauge and the pressure has to travel up the little tube to the dash.
When my 124 had a bad oil pressure gauge sender (mounted on the oil filter block) it would read above zero with the car turned on but not running. My first guess, therefore, would be bad sender. A new sender cured my problem. It took my mechanic two senders over 6 months to get me a good one, BTW. Jeremy
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#8
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My dad's 300SDL goes up to 3 on ACC and goes to 0-3 bar when started...
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi |
#9
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Quote:
Jeremy
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#10
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IIRC mine stays at 0 until the oil pressure comes up...
-Jason
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#11
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OP reading at "Glow"
Nope,
'Just went out and turned key to "Glow"...OP Gauge unresponsive. Engine Start- OP gauge pegs. Yours might be sensor (As suggested) [Or Wiring problems]
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'84 300SD sold 124.128 |
#12
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Quote:
IF their gauge EVER reads anything while the engine is running (like a warm idle) besides a pegged 3, then I'm wrong. Mine, for the record, stays fully at zero until the engine is running and has pressure. EDIT: I just realized why this doesn't exactly make sense. The electrical OP gauges do not lose power under starting, because I just remembered that I can watch my starter bring the oil pressure up from zero before the engine ever starts firing on its own. So, I'm changing my guess to "wiring problem" Sorry |
#13
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I'm still going with normal, a gauge check just like the lights coming on. Mine both did the same, full-scale when first turned on, then reading normally in start and after starting.
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Gone to the dark side - Jeff |
#14
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ok, I'm curious to what it reads right after you turn it off then?
__________________
1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350 |
#15
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"It depends"
Quote:
2a. 603 engine w/electric gauge – goes immediately to zero when key is turned OFF. 2b. 603 engine w/electric gauge – sinks to zero over a couple of seconds after engine is shut off with STOP lever (key left ON). Jeremy
__________________
"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
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