|
|
|
|
|
#1
05-07-2008, 01:54 AM
|
|||
|
|||
|
Pressure gauged maxed out, WHY
What should I be looking at first when my pressure gauge jumps to max (3) when I start the car? I know alot of MB do this, but why? Should I start by checking the sender unit or the gauge? Is these really a problem or I'm I making something out of nothing.
Any help would be great. Thanks
__________________
Professional greasecar installer Austin TX 98 Jetta TDI with grease car kit + veg-therm (totaled) 87 MB 300SDL running on B99 / greasecar kit + 30 fphe www.austingreaseguys.com 
|
|
#2
05-07-2008, 02:17 AM
|
||||
|
||||
|
Your making something out of nothing. The Oil pressure gauge (i'm assuming) is always pegged on cold start up. once warm, it should be around 2 bar until you punch the gas, then it will be 3 agian. Nothing to worrie about, just regular operation.
__________________
1983 Euro 240D 277K 2016 Mazda 6 Coming Soon, 2013 Mercedes E350 Bluetec Formers: 2012- Mazda 3 2007 Outlander- complete pile 1995 E300 Diesel 208K 2007 VW Passat 2.0T  63K SOLD2003 Jaguar X-type 3.0 Sport Sold 04/11 w/88K 2009 Lexus RX350 9061 miles. Sold 04/09 2008 Mitsubishi Lancer GTS:Totaled Sept.,09 @ 24,000 2003 Infiniti I35 58K Sold 1984 300 turbo diesel 222K
|
|
#3
05-07-2008, 02:49 AM
|
|||
|
|||
|
Pressure gauged maxed out, WHY?
Because that is how it works.
 When it ISN'T pegged when the engine is cold or above idle, is when you should start to worry. Last edited by ForcedInduction; 05-07-2008 at 05:07 AM.
|
|
#4
05-07-2008, 05:01 AM
|
||||
|
||||
|
your worried about 3 bar cold idle psi? 1 bar = 14 psi. So your worried about (at least) 42psi cold idle oil pressure? If anything, this is good and a blessing just sit back and enjoy it. On my list of things to worry about, high cold oil pressure is right below "did my diesel come from tortured dinos?"
__________________
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? As long as they would add one additional commandment for you to keep thy religion to thyself. George Carlin (Wonder where he is now..) 1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won. pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt. Last edited by Cervan; 05-07-2008 at 05:11 AM.
|
|
#5
05-07-2008, 08:25 AM
|
||||
|
||||
|
I only wish MB had put a proper gauge on there that actually showed what the pressure is... I like to know.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
|
|
#6
05-07-2008, 08:28 AM
|
|||
|
|||
|
i would have thought someone that has been registered since 2005 would have seen this question come up a few times and already know the answer
__________________
-Trevor OBK #12 1980 300SD 333,XXX miles - Totaled 1986 Mazda RX-7 212,XXX miles - impounded and auctioned off 2005 Jeep Liberty CRD Limited 33,000- SEGR, Provent, Fumoto
|
|
#7
05-07-2008, 08:38 AM
|
|||
|
|||
|
I have to admit I have often questioned the wisdom of M-B's design of the oil pressure gauge scale but some things they do just defy logic or wisdom. The serenity prayer comes to mind.
For example, on our brand new C300, they have a temp gauge which they have thoughtfully put in the same location as the fuel gauge is on my E300 and reversed the fuel gauge to be where the temp gauge was...while that isn't disorienting enough, they have the car running at 90C but still have 80C as the "horizontal" spot on the gauge...so it always looks like it is running "hot" even though it is designed to run at 90C (at least that is what I have been told) so the needle never points at or near the horizontal position but always looks to be high to people used to the old style where 80C was normal and at near horizontal...again, just an annoying issue they should have addressed but didn't.
__________________
Marty D. 2013 C300 4Matic 1984 BMW 733i 2013 Lincoln MKz 
|
|
#8
05-07-2008, 10:25 AM
|
|||
|
|||
|
Quote:
When I flew in P-3 the Flight Engineers used to rotate the gages so the lines all looked normal (straight across). Easy to spot something out of place with 50 or so gages. LOL You could always go with an aftermarket something like this: http://www.glowshiftdirect.com/index.asp?PageAction=VIEWPROD&ProdID=259 Scroll down and you'll see they also offer EGT Gauges and others.. Nice..
__________________
92 300D 2.5L OM602 OBK #59
|
|
#9
05-07-2008, 10:25 AM
|
|||
|
|||
|
Heck, most people who buy new Mercedes cars wouldn't have any idea how to read a gauge. All they respond to is a bright red warning light, and even then they will continue to drive until it blows up thinking, "I can get to my destination, can't be that important." You're lucky Mercedes still feels gauges are important enough to install.
|
|
#10
05-07-2008, 10:49 AM
|
||||
|
||||
|
Quote:
__________________
 ~Michael S.~ Past cars: 1986 300SDL 1987 300SDL 1982 240D 1982 300SD Current: 1987 300SDL
|
|
#11
05-07-2008, 12:41 PM
|
|||
|
|||
|
>>know exactly what's going on
Why? Once you've got over 3 Bar of oil pressure, that's plenty. How would it affect any driving decision to know whether the oil pressure is reading 3.5 or 3.7 Bar. I like the pegged needle, it's much better than having a needle yo-yoing back and forth. Also, having a 3 Bar range allows the gauge to be more accurate and sensitive for reading the low pressures when things do become critical. I'm happy that my gauge would allow me to check to see if I have over 0.3 Bar at hot tickover, where a full scale reading gauge would never provide that sort of (useful) information.
|
 |
| Bookmarks |
|
|
Linear Mode
