Oil Pressure
Thread Starter
Almost a Member!
Joined: Nov 2006
Posts: 74
Likes: 0
Oil Pressure
When my car is cold it has good oil pressure (on the "1" @ idle, raises to "3" when above 1500rpms) once the car goes to normal operating temp, the guage reads "0" @ idle but builds up to "3" as soon as it comes above idle.
Why would this be? It doesn start tapping or anythign when the oil pressure drops, could it just be the guage being stupid?
adn btw the oil level is good, just changed the oil too.
Why would this be? It doesn start tapping or anythign when the oil pressure drops, could it just be the guage being stupid?
adn btw the oil level is good, just changed the oil too.
MBWorld Fanatic!
Joined: Jun 2005
Posts: 1,487
Likes: 6
From: Socialist West Coast
95 E320, 19 Ram 1500 Hemi, 21 GLS 580(wife)
Are you using the right weight of oil? I know that my guage behaves differently depending on that. I just changed my oil and timing chain and used 10-30 because it is well below freezing right now. Started my car today for the first time this week and it was 13 degrees, damn cold. My oil guage stays around 1 at idle when warm, and at about 3 when cold.
When is it going to warm up? We are getting an arctic winter here in WA, and it sucks.
When is it going to warm up? We are getting an arctic winter here in WA, and it sucks.
Thread Starter
Almost a Member!
Joined: Nov 2006
Posts: 74
Likes: 0
Do you think maybe its a problem with the sender? I cranked it up and at idle when warm you can see plenty of oil being injected ontop of teh camshalft, so I do still have oil pressure at idle, just the guage says "0" at idle once warm.
MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,094
Likes: 0
From: Boston
is a German Tank
reads 2.5 when cold at idle (always shoots up to the three with increased rpms)
reads 0 when warm at idle (always shoots up to the three with increased rpms)
MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,094
Likes: 0
From: Boston
is a German Tank
Trending Topics
Member
Joined: Mar 2006
Posts: 114
Likes: 0
From: Washington, the State
1993 300CE Sportline
oil weight
I believe MB reccomends 0w-30 5w-30 as the correct oil. With the MB engines all clearances are VERY tight compared to american engines so the engine needs a thin oil at startup. I use the Mobil 1 in 5w-30. Anyone have a manual handy to check it out?
kurt
1993 300 CE
kurt
1993 300 CE
MB World Stories
The Best of Mercedes & AMG
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
MBWorld Fanatic!
Joined: Apr 2006
Posts: 3,062
Likes: 0
From: Houston, Texas
Dora the Explorer
It could be your sender or it could be the lower wiring harness.
MBWorld Fanatic!
Joined: Jun 2005
Posts: 1,487
Likes: 6
From: Socialist West Coast
95 E320, 19 Ram 1500 Hemi, 21 GLS 580(wife)
Oil is such a tough call, it's like the battle of the antiacids, in the end they really all get the job done, although I did find a economy improvement when I used synthetic, and it is so nice and clean.
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,042
Likes: 1
From: Bellevue, NE
1995 E320 SE, 162,000 Miles (Sold) 2007 CLK350 Cabriolet 2014 ML550
Interesting. I've never seen mine below 2 bar (30 psi) with the engine hot. Also, looking at pics of these cars on E-bay, some are shown with the engine running and warm and they are all at 2-3 bar. However, if you see oil at the cam you should be OK. The cam is the last place the oil goes, I believe. Low oil pressure can be due to loose bearings, worn oil pump, or a pressure relief valve stuck open. All are major repairs so as long as it comes up when you are driving I would not worry about it. I had the identical issue with my '85 Volvo turbo. There were never any noises or problems associated with it. BTW, my stealership uses Quaker State Peak Performance 5W30.
