Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: mantaray on 01 March 2017, 19:01:55
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2.6 V6
While sitting in trafic the other day, the oil light came on. I cheaked the oil level and all seemed to be ok.
But today it has come on again when engine is below 1000 revs, increase the revs to over 1000 and it goes out. Oil level is fine.
Is this down to a worn oil pump?
Thanks for any help.
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The oil light as in red light or the warning on the display?
Red oil light = Pressure
Oil on Display = Level
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I've had this on a 2.2DTi and it turned out to be nothing more than a faulty pressure switch.
Given all the oil pressure sensors on Vx cars look very similar / identical it's probably worth checking.
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The oil light, as in red light on clocks.
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If the oil light goes out at over 1,000, is it still likely to be just the switch?
OP, are there any other indications that the oil pressure might be low?
Ron.
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When was the pick up pipe last checked ? . These engines seem to have a tendency to block up the mesh on the pipe.it starts with occasional low pressure as it gets nearly blocked and then struggles to suck and can block completely. If you haven't done it recently or ever then it's definitely worth doing. A very common problem .easy enough to sort out. Plastic sump cover off,oil drained,lower sump off being careful to remove oil level sensor once inside. Then remove pick up pipe. Clean thoroughly,refit with new o ring.clean sump faces,refit sensor and replace sump.mine used sealant only.no gasket.refill new oil and filter and away you go
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If the oil light goes out at over 1,000, is it still likely to be just the switch?
OP, are there any other indications that the oil pressure might be low?
Ron.
Yes that was my experience with a DTi
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You could try a pressure reading from the engine by fitting a test guard but the v6 engines are prone to the pick up pipe blocking.usually due to lack of oil changes,short runs,breather box grunge being forced into sump ! Worth doin for piece of mind
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When was the pick up pipe last checked ? . These engines seem to have a tendency to block up the mesh on the pipe.it starts with occasional low pressure as it gets nearly blocked and then struggles to suck and can block completely. If you haven't done it recently or ever then it's definitely worth doing. A very common problem .easy enough to sort out. Plastic sump cover off,oil drained,lower sump off being careful to remove oil level sensor once inside. Then remove pick up pipe. Clean thoroughly,refit with new o ring.clean sump faces,refit sensor and replace sump.mine used sealant only.no gasket.refill new oil and filter and away you go
Not really! Very rare I would say. Perhaps on SAAB, but not on Vauxhall.
I dropped sump on my 3.2 at approx 145k, feed pickup was totally clear.
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Before shitting a brick, what mileage and what oil?
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Don't know what sort of history the engine has, only had the car a few months. I have done an oil and filter change, rocker gaskits and have a new 2-4-6 coil pack to fit as it shows a code for miss fire on 2.
Think I will try a new pressure switch first, as it seems to be an intermitent fault, and if that does not cure it then I'll drop the sump cover and try the pick up pipe.
Mileage is 139000, oil 10W40
Thanks for the advice so far.
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Flickering light at idle isn't unusual on higher mileage or neglected cars...
As long as the light goes out as soon as the revs move, then don't fret it :y
Was also going to suggest using 10w40 instead of 5w30, but you've ruled that out ;)
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As long as the light goes out as soon as the revs move, then don't fret it :y
That was my thinking too. I've done about 2000 mile since owning the car and the oil light problem has only just started, so not too worried. Would just like to get her all good and sorted as i am starting to like her over my 2.5 TD.
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Worth confirming with a gauge. When I got my omega the oil light came on and engine had no oil pressure. Switched off ,started again light went out,1 mile down road came back on again. Removed oil pressure switch ,fitted gauge started up and pressure was there but only just .30 secs later pressure gone again.drained oil ,removed sump,pick up pipe totally blocked. Unknown history before I got car.cleaned pipe,new o ring rebuilt and checked. Oil pressure up to 4 bar and 2 at idle. Kept gauge on for a month. All ok . That was my experience and that was after googling problem.took me to this omega site and a posting my James. It was the problem on mine ,may not be on yours but easy job to check and then you know it's definitely not blocked.
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Happens from time to time on my X30xe. Maybe a couple of times a year. Only at idle and when the engine has been working Harder than usual. Always goes out above idle rpm. Pickup is clear and car has done almost 500.000km so havent bothered with it. I just make sure i dont keep it idling with the light on.
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Happens from time to time on my X30xe. Maybe a couple of times a year. Only at idle and when the engine has been working Harder than usual. Always goes out above idle rpm. Pickup is clear and car has done almost 500.000km so havent bothered with it. I just make sure i dont keep it idling with the light on.
If the engine has been 'working hard' then the oil is probably very hot and a bit 'thinner'.
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With those symptoms, I would invest £5 in a new oil pressure switch. Common Vauxhall failure. You'll fix one of the designed in oil leaks while you're at it ::)
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With those symptoms, I would invest £5 in a new oil pressure switch. Common Vauxhall failure. You'll fix one of the designed in oil leaks while you're at it ::)
Or split the casting and make it 10 times worse :P
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I don't understand the reluctance to drop the oil pan and ladle the gunk out of the oil pick up (and from the ledges around the sump where the gunk likes to accumulate) :-\
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some times this can be a problem
(http://i67.tinypic.com/2cgojg3.jpg)
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I don't understand the reluctance to drop the oil pan and ladle the gunk out of the oil pick up (and from the ledges around the sump where the gunk likes to accumulate) :-\
. Same as mine. Mine came with no service history and not much signs of anything replaced by previous owner so mine had an unknown history oil change wise. My oil light came on and as you say pick up pipe and ledges around were all gunked up. At least i know mine is now clear.someone posted earlier about how clean his was inside.that shows more than likely that his was well maintained and had regular oil changes.something that when buying a unknown quantity like mine is in doubt.!
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I remember a mate of mine bought a chevette years ago. Took the rocker cover off and it just had a mass of jelly underneath, which wobbled around on the rockers when you started the engine. ;D
The breathers had also saturated the air filter with manky oil.
A couple of oil changes, adjust the tappets and a good service and it ran beautifully. The seller probably wouldn't have got shot of it if he'd bothered to service it. As it was, my mate got quite a bargain.
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You were lucky .we had a manta years sgo that had not had an oil change in 70k. It wouldnt drain out of the sump !
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Try anything that belongs or used to belong to a farmer, be it automotive or machinery!
We have a number of selected pieces of steel which are regularly used to 'rod' oil drains!
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I'd drop the sump personally, I've know two 2.6's that have expired with oil starvation to the rear of the drivers side bank.
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Droped the sump today, and although there was a little bit of sluge in the pan,not enough to worry about.
So looks like it is the oil pressure switch. Will get a new one and see if that sorts it.
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What was the pick up pipe like. ? And did you check/ change the pick up pipe o ring. Sorry if you have put it all back together now.not being nosey or telling you what to do just passing on what i did to mine after reading several similar reports on here .
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Droped the sump today, and although there was a little bit of sluge in the pan,not enough to worry about.
So looks like it is the oil pressure switch. Will get a new one and see if that sorts it.
Hence my suggestion to spend the £5 and a minute with a 24mm spanner FIRST ::)
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Yes the switches do tend to leak anyway so worth fitting a new one. After removing the sump at least its now piece of mind that you know its all clean in there. What i did with mine is temporarly fitted a cav/ manta 2 terminal sender unit and ran it to a guage and left it on for a few journeys. Before i took sump off and cleaned pick up the guage only barely registered even when light was out but dropped to nothing in conjuction with light. Afterwards pressure was up near 4.5 bar and two at idle
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Yes the switches do tend to leak anyway so worth fitting a new one. After removing the sump at least its now piece of mind that you know its all clean in there. What i did with mine is temporarly fitted a cav/ manta 2 terminal sender unit and ran it to a guage and left it on for a few journeys. Before i took sump off and cleaned pick up the guage only barely registered even when light was out but dropped to nothing in conjuction with light. Afterwards pressure was up near 4.5 bar and two at idle
This^
The only purpose of the oil pressure switch is to tell you when the engine is scrap.
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Exactly .im not 100% sure but I think the oil pressure switch turns the light off at anything above 0.5 bar. So this means that your engine could be running all day long at 0.6 bar and you wouldn't know. It's a pity most cars don't have a gauge on the dash .(fitting aftermarket gauges always looks tacky to me.)this would also tell you of a stuck relief valve sending the pressure up through the roof at higher revs.
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The Senators always had an oil pressure gauge,I never did understand why GM deleted this from the Omega.
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I know. Going back to senator era vauxhallls,all normal spec cars got a fuel and temp guage and all higher spec stuff always got an oil pressure and a voltmeter.viva,cav,manta,carlton,senator.i have been trying to work out if i could fit my guage somewhere on my omega but to make it look stock.i bought an instrument cluster to experiment with.not come to any satisfactory way yet !
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The Senators always had an oil pressure gauge,I never did understand why GM deleted this from the Omega.
Probably because the average seat-steering wheel interface didn't have a clue what it was telling them and those who didn't completely ignore it would fret about it reading higher on a cold morning than after a good spanking on a hot day.
Same reason car manufacturers are now either removing temperature gauges in favour of a warning light or engineering in a large "dead zone" so the gauge doesn't move over the normal range of operating temperature.
Not saying it's right, just a symptom of what a car manufacturer has to deal with. ;)