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#1
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oil pressure
Just changed the oil on my 300D. Prior to the oil change and since I got the car the idle pressure has been at about the 1 1/2 mark. Now the pressure sits just over 2. This is my 3rd oil change and don't think I did anything different. Any thoughts.
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84 300D 251K 87 190DT 281K - Sold 06 Ford Escape 172K 94 Ford Ranger 250K 99 Chevy Suburban 181K |
#2
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Higher viscosity oil??
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#3
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Probably not a big deal. Quite a few things will affect the pressure you see at idle. Mine is pegged out cold, but will drop to 2 to 2.5 after it warms up. I adjusted the valves a few weeks ago and it changed some after, because I took the throttle linkage apart and the idle speed probably changed slightly. The colder fall weather has made a difference in the idle speed, as well. Also, oil viscosity can change this. When I changed from dino oil to synthetic, the idle pressure dropped some due to the thinner nature of the synthetic oil. Bottom line here is...small changes in the pressure at idle are meaningless.
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1976 240D 1987 560SL 2007 E320 Bluetec 1998 C280 (now son’s car) 1982 240D Manual - Sold |
#4
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Your oil pressure will drop as the oil filter gets dirty and the oil starts to get old and thicken up with engine cooties. On my old Audi, the odometer died years ago, so never know when it is due for an oil change. So I just watch the oil pressure gage. When it drops below 2 bar at idle when hot, I change the oil & filter. Then the pressure is great for what I estimate to be another 3,000 to 4,000 miles. It's worked for the past 6 years, with exactly the same results everytime.
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past MB rides: '68 220D '68 220D(another one) '67 230 '84 SD Current rides: '06 Lexus RX330 '93 Ford F-250 '96 Corvette '99 Polaris 700 RMK sled 2011 Polaris Assault '86 Yamaha TT350(good 'ol thumper) |
#5
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Now Rick, Don't that border on the guy who gets around to adding oil when he hears the lifters rattling on his old Maver-wreck?
Seems I recall a few of those fellows in my gas station attendent days. |
#6
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Yeh! Kinda like the old volkswagon I had. It had the optional "chage-o-matic" oil system. It leaked so much, all I ever did was add a quart abouit once a week!
If the audi was a car that was REAL valuable, I'd do something more about it. But as old as it is, if it blows up tomorrow (not likely!) I have more than gotten my money's worth out of it. But those old Audi 5-cylinder engines are nearly indestructable. They far out live the electrical system!:p
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past MB rides: '68 220D '68 220D(another one) '67 230 '84 SD Current rides: '06 Lexus RX330 '93 Ford F-250 '96 Corvette '99 Polaris 700 RMK sled 2011 Polaris Assault '86 Yamaha TT350(good 'ol thumper) |
#7
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thanks for the reply's. This cars running so well I just wanted to be careful.
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84 300D 251K 87 190DT 281K - Sold 06 Ford Escape 172K 94 Ford Ranger 250K 99 Chevy Suburban 181K |
#8
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Don't ya love the way we beat someting to a pulp!
Enjoy your Benz! Take care of it, and it'll take care of you! (that was corny and uncalled for! sorry)
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past MB rides: '68 220D '68 220D(another one) '67 230 '84 SD Current rides: '06 Lexus RX330 '93 Ford F-250 '96 Corvette '99 Polaris 700 RMK sled 2011 Polaris Assault '86 Yamaha TT350(good 'ol thumper) |
#9
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I say we turn this into another oil thread. Yes, I have a tranny swap coming up this weekend and I think a diversion would do nicely. So tell me, should I change now to synthetic oil, or wait until after a full moon?
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#10
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Somebody! please! Get a rope!:p
__________________
past MB rides: '68 220D '68 220D(another one) '67 230 '84 SD Current rides: '06 Lexus RX330 '93 Ford F-250 '96 Corvette '99 Polaris 700 RMK sled 2011 Polaris Assault '86 Yamaha TT350(good 'ol thumper) |
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