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Author Topic: Oil pressure  (Read 7289 times)
krede
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« on: April 15, 2007, 12:35:19 pm »

At almost exactly 4000 rpm the needle in my oilpressure gauge drops to nought...!!
has anyone had this same faliure?..
The gauge has been somewhat inconsistant in its readings since I bought the car (where the gauge needle was dancing the rumba most of the time),I suspect some sort of electrical fault, and so am not in any state of panic....though lack of oilpressure is not something I like to mess about with... especially at 4000+ rpm  Wink 
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Anders Dinsen
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« Reply #1 on: April 15, 2007, 02:51:54 pm »

No, lack of oil pressure isn't a funny thing........ If it is an electrical fault it could be the green connector in the engine room. If you pull it apart you will probably see that the connectors aren't pretty. I'd try measuring the resistance over the sensor at different ends of the system to determine if there's a loose connection. And why not replace the sensor right away?

I get about 4 bars of oil pressure when the engine is cold, dropping to 3 or so when the oil has warmed up and viscosity has decreased. It's fairly stable.

- Anders
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'82 Murena 2.2 prep 142
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Lennart Sorth
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« Reply #2 on: April 15, 2007, 03:10:46 pm »

dropping to 3 or so when the oil has warmed up and viscosity has decreased. It's fairly stable.

I have always seen somewhat lower pressure (~2.5-3) at idle than higher revs - it seems as if I need to get over 1500-2000 revs before it stabilizes at 3.5-4.

As far as I can remember, it has been like that both on my original 1.6 engine and the 8 years I have had my 1.9i. 

(Except for when the 1.9i broke down due to lack of proper maintenance - I had overlooked a hole in the air filter. - but I try to forget that unfortunate incident. )

/Lennart
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Lennart.Sorth@matrasport.dk
Murena 1983 1.9i silver // Alfa Romeo Giulietta 2.0d 2012 white // Smart 4two cdi 2010 blue //
Anders Dinsen
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« Reply #3 on: April 16, 2007, 10:22:27 am »

I noticed how the instrument runs yesterday when I testdrove the car, and I have to add that my oil pressure in idle is a bit unstable. But it tends to move with the idle speed which isn't entirely stable either, that's all.

Lennart, I don't remember you had an incident with your car... you just had it off the road for a couple of years to perfect it, didn't you? Cheesy

- Anders
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'82 Murena 2.2 prep 142
'01 Grand Espace 24v
'08 Smart Fortwo 0,8 cdi
Lennart Sorth
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« Reply #4 on: April 16, 2007, 10:31:28 pm »

Lennart, I don't remember you had an incident with your car... you just had it off the road for a couple of years to perfect it, didn't you? Cheesy

You have turned forty now, haven't you ?


PS: Who the hell are you anyway ?

/Lennart, I think
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Lennart.Sorth@matrasport.dk
Murena 1983 1.9i silver // Alfa Romeo Giulietta 2.0d 2012 white // Smart 4two cdi 2010 blue //
Anders Dinsen
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« Reply #5 on: April 17, 2007, 06:18:01 am »

Lennart, I don't remember you had an incident with your car... you just had it off the road for a couple of years to perfect it, didn't you? Cheesy

You have turned forty now, haven't you ?

What are you implying Huh

I'M ONLY THIRTYSEVEN. A few days more.... Wink

Quote
PS: Who the hell are you anyway ?

Hmmmm can I call someone?

- Anders Cool
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'82 Murena 2.2 prep 142
'01 Grand Espace 24v
'08 Smart Fortwo 0,8 cdi
Lennart Sorth
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« Reply #6 on: April 18, 2007, 01:32:20 am »

What are you implying Huh

Oups .. sorry. Now what can I do to get your oil pressure down to normal again ? - buy you a beer ?

/Lennart
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Lennart.Sorth@matrasport.dk
Murena 1983 1.9i silver // Alfa Romeo Giulietta 2.0d 2012 white // Smart 4two cdi 2010 blue //
Anders Dinsen
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« Reply #7 on: April 18, 2007, 06:06:54 am »

What are you implying Huh

Oups .. sorry. Now what can I do to get your oil pressure down to normal again ? - buy you a beer ?

Yes, that seems to help Smiley
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'82 Murena 2.2 prep 142
'01 Grand Espace 24v
'08 Smart Fortwo 0,8 cdi
krede
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« Reply #8 on: April 19, 2007, 03:29:39 pm »

Well... I can report that at 4000 rpm, instead of droppig to zero, my oil pressure gauge has decided go in the other direction, and move to 5 bar instead... thats a 180 degree turn on opinion.... perhaps it has a future in politics?... Grin
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davidewanprice
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« Reply #9 on: April 19, 2007, 04:16:30 pm »

I had a look at mine, when cold its about 4, then decreases as it warm, seems to stay around 1 to 3, cant say i was looking at 4000rpm, but i'll keep an eye and let you know.
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Anders Dinsen
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« Reply #10 on: April 19, 2007, 05:16:03 pm »

Well... I can report that at 4000 rpm, instead of droppig to zero, my oil pressure gauge has decided go in the other direction, and move to 5 bar instead... thats a 180 degree turn on opinion.... perhaps it has a future in politics?... Grin

Hmm, interesting point...

It doesn't sound like an electrical problem to me Shocked
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'82 Murena 2.2 prep 142
'01 Grand Espace 24v
'08 Smart Fortwo 0,8 cdi
krede
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« Reply #11 on: April 19, 2007, 05:36:27 pm »

Seems to me the sensor is broken... think I will try and replace it next time I change the oil
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Anders Dinsen
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« Reply #12 on: April 19, 2007, 08:55:58 pm »

Seems to me the sensor is broken... think I will try and replace it next time I change the oil

That's certanly not unlikely... Anyway, the sensor is sitting above the oil filter so it should not drain any oil off the system if you remove it to switch it over to another one. Apart from that the job is horrible, you may not be able to get a good grip without removing the oil filter I think... Worse than when I had to replace a water hose clamp yesterday  Angry

- Anders
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'82 Murena 2.2 prep 142
'01 Grand Espace 24v
'08 Smart Fortwo 0,8 cdi
krede
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« Reply #13 on: April 19, 2007, 10:30:51 pm »

I recon I can get it on the lift where i work in a weeknd.. should make access much easier  Tongue
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