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Author Topic: V6 oil level sensor location/photo of  (Read 1320 times)

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Alnico Blue

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V6 oil level sensor location/photo of
« on: 09 December 2018, 07:27:35 »

(2.6) I still have this small oil leak where the oil lays on top of the sump flange below the pulleys . It seems to be coming from below the altenator somewhere.

The leak is not a lot , more annoying than a problem, but would like to stop it.

I thought it was coming from the threads of the sump bolts at the front , but now it seems it is not.

Anyone got a pic of the engine which shows where this sensor & its wiring entry postion are exactly or can anyone rule out this as a possible source of this small leak.

TIA Al  ;)
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amba

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Re: V6 oil level sensor location/photo of
« Reply #1 on: 09 December 2018, 09:07:23 »

You and me too Al.

I thoroughly cleaned sump and surrounding area to within an inch of its life .Removed and replaced the oil sensor and all seemed fine for a few 100 miles,then the traces of clean oil started again on top of the sump lip and puddling in the hollow below the alternator.

For the life of me I cant seem to trace it either.I have no evidence of oil leaking from the o/s cam cover especially as it was replaced in the summer with genuine,and when you run your finger around the join of the plastic casing and alloy head no oil is evident.


When Nick replaced cambelt mid summer he was certain leak was not front crank seal as that was also dry and it would be causing more of a spray than just the puddle I ,and you ,both seem to have.Its only ever a small puddle,doesnt drop onto the floor nor does it go beyond just the lip and hollow directly below alternator.


Nothing seems to be bolted to the block above that area which could leak oil so like you Im at a loss as to where it is coming from...more of an annoyance than a detriment though.


 
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Re: V6 oil level sensor location/photo of
« Reply #2 on: 09 December 2018, 09:37:10 »

Oil pressure switch... Front of block, below alternator... There's an angled cable tray that points to it.

Oil level switch unlikely as that's mounted much further back, beneath starter, and sits in top face of sump in an area with no oil... Business end of sensor actually sits a couple of inches below the sump top and engine running there's very little oil around it.
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shyboy

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Re: V6 oil level sensor location/photo of
« Reply #3 on: 09 December 2018, 11:40:00 »

I also have exactly this problem, and the oil always look fresh and very clean. After cleaning all trace of it from the sump lip and the 'hollows' running down the sides of the sump flange, it re-appears directly below the crank pulley and then slowly progresses outwards.
I have assumed that this is the crank seal leaking only when the engine is running, with pressure in the sump being sufficient to force the oil out. I'm hoping that cleaning the breather system effectively might help to substantiate this, but am preparing myself for accepting that the seal will need replacing anyway once it's been breached.
Any further experiences or discoveries would be very interesting to learn.
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amba

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Re: V6 oil level sensor location/photo of
« Reply #4 on: 09 December 2018, 19:28:43 »

Its more annoying than a real issue as never "breaches" front of sump lip so never causes oil traces under car...might also be I,m now paranoid about it and clean it away almost the moment it appears and rarely causes oil level warning between changes.

Maybe constant turning of crank may cause the leak when pressure builds up but would of expected it to be more of a spray pattern than just oil laying on the sump lip and hollow below alternator.
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Re: V6 oil level sensor location/photo of
« Reply #5 on: 10 December 2018, 09:08:35 »

The fact that no oil drips onto the ground seems strange on first thoughts, but my reasoning is that oil only gets past the seal in any quantity when the engine is running and that airflow takes most of it away down the sides of the engine when travelling. Where it actually ends up I don't know, but I sometimes can detect a slight burning oil smell on longer journeys, suggesting that some gets onto the exhaust. I must make the effort to get underneath to check this out sometime.  :-\
My money is still on the crank seal being the source of the problem.
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amba

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Re: V6 oil level sensor location/photo of
« Reply #6 on: 10 December 2018, 10:21:34 »

Yep follow your logic and really can be the only possibility as the underside of my oil pressure sensor is dry and has been replaced only a few weeks ago.

No other evidence on the side below the a/c compressor so maybe it is only under pressure and running it leaks and being as crank is rotating that way oil will always be on the side below the alternator.

Given the effort and cost involved in replacing it I will just continue as before and wait the next cambelt change probably in 2020 assuming I and the car are still running ;D
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shyboy

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Re: V6 oil level sensor location/photo of
« Reply #7 on: 10 December 2018, 13:24:45 »

Amba.
The oil on mine ends up down both sides of the sump flange, but I don't clean mine off as often as you say you do. I'm sure you're right that the rotation of the crank pulley tends to throw the oil to the alternator side initially but that this is eventually overcome by the amount of oil leaking and by air flow on a longer run or after a longer period between cleaning.
As you say it's not a major problem and I still don't need to top up the oil level between changes. Being a bit finical, I just find it annoying that my engine isn't completly free of all oil and water leaks.  ;D
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amba

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Re: V6 oil level sensor location/photo of
« Reply #8 on: 10 December 2018, 13:53:42 »

Agree and think best just monitoring it as work and cost to replace seems excessive tbh.

Omegas are notorious for being incontinent and don't hold their fluids well,with too many silly seals and plastic bits but heyho :)
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amba

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Re: V6 oil level sensor location/photo of
« Reply #9 on: 10 January 2019, 11:20:21 »

Sorry to trawl this up again but am still struggling to understand how or more importantly where this is leaking from.

Yesterday morning,almost as usual I rinsed the clean oil residue from directly under the alternator wher it always seems to puddle ontop of the sump flange.

Drove my normal 100mile work jaunt and got home just as getting dark.Thought I would see if oil was as expected puddling along sump lip ,and to my surprise very little almost non was evident .Checked it again around hour later when engine had cooled slightly and same very little oil.

Car parked up all night,but when I went out this morning around 10.00 found quite a visible puddle again on the top sump lip directly below alternator .

Now if this leak is being caused by the failing crank shaft seal,as I am pretty certain it is not from camcover seals nor oil level sensor as all have fairly recently been replaced in an attempt to track this leak down, why would oil be leaking with the engine not running.?


Really would like to get to the bottom of this and get it fixed as Im now becoming paranoid about it  :o
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Re: V6 oil level sensor location/photo of
« Reply #10 on: 10 January 2019, 12:04:17 »

Cam seal...
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amba

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Re: V6 oil level sensor location/photo of
« Reply #11 on: 10 January 2019, 12:17:30 »

Will investigate that suggestion ,although cam ends were dry when cover seal replaced on O/S late summer last year and oil has been evident since before then .

Suspect that would of also been evident when timing belt was replaced in November last year also
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Re: V6 oil level sensor location/photo of
« Reply #12 on: 10 January 2019, 12:52:35 »

Not necessarily... Could be draining down behind the rear cover ;)

Wouldn't be visible without removing the cam pulley :y
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amba

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Re: V6 oil level sensor location/photo of
« Reply #13 on: 10 January 2019, 13:33:05 »

Yes see where your coming from .

So pulleys and back plate need removing to get a good look .
Job for warmer months and certainly beyond my skill set so will track “The Man “ down 😀
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VXL V6

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Re: V6 oil level sensor location/photo of
« Reply #14 on: 10 January 2019, 15:04:06 »

Usually the exhaust cams which the cam seals fail on first
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Migv6 le Frog Fan

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Re: V6 oil level sensor location/photo of
« Reply #15 on: 10 January 2019, 15:44:59 »

I have the same problem with mine, but don't intend to do anything about it. Old Omegas leak a little bit of oil, so I can live with it.  :)
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amba

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Re: V6 oil level sensor location/photo of
« Reply #16 on: 10 January 2019, 16:26:03 »

True words there Albs,its just it makes such a good damn mess and unless you clean it away almost daily shows the engine bay up of what is otherwise a tidy engine.Perhaps the answer is tonot keep opening the bonnet  ;D

Interesting about exhaust cam as that seems to make sense if mine are leaking as they are at the lower point of the head and could be the right path a potential leak could take. 
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Alnico Blue

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Re: V6 oil level sensor location/photo of
« Reply #17 on: 10 January 2019, 19:01:37 »

Reading these recent posts with interest .   ;)

Seems this little leak issue is more common that we thought
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amba

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Re: V6 oil level sensor location/photo of
« Reply #18 on: 10 January 2019, 20:43:33 »

Yes,Al and seems a whole heap of work and cost just to replace a couple of seals.

Cam covers off / all timing set removed along with all that entails/All cams and caps removed..and then you are faced with needing Super Human strength along with fabricated tooling to just get the crank pulley off.

Then its all got to go back together along with new seals and sealant assuming they can all still be bought.

Think it might be just live with it  :( ??? :(
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Alnico Blue

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Re: V6 oil level sensor location/photo of
« Reply #19 on: 11 January 2019, 04:44:09 »

Yes,Al and seems a whole heap of work and cost just to replace a couple of seals.

Cam covers off / all timing set removed along with all that entails/All cams and caps removed..and then you are faced with needing Super Human strength along with fabricated tooling to just get the crank pulley off.

Then its all got to go back together along with new seals and sealant assuming they can all still be bought.

Think it might be just live with it :( ??? :(

It's looking that way here as well  ::) ::)
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sjc

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Re: V6 oil level sensor location/photo of
« Reply #20 on: 12 January 2019, 16:24:00 »

Not necessarily... Could be draining down behind the rear cover ;)

Wouldn't be visible without removing the cam pulley :y

+1 for cam seals - I used to get exactly the same puddle of oil that seemed to come from the oil pressure switch but it continued after fitting a new one.

I had to do the head gaskets (YES THEY DO FAIL) and once the rear timing cover came off it was quite obvious that the oil was coming from the cam seals.  All dry as a bone now, probably the only Omega I've owned that has a nice clean engine!
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Re: V6 oil level sensor location/photo of
« Reply #21 on: 12 January 2019, 17:33:28 »

If I own my car long enough to change the cambelt again, I may well look into that as part of doing the job.  :y
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Re: V6 oil level sensor location/photo of
« Reply #22 on: 12 January 2019, 17:35:22 »

Thanks for further clarification,Jim.

Problem is lots of cost in seals and gaskets just to get to them and as only recently had belt/pullies done and both cam covers gaskets I will need to weigh up...dirty engine or lots of work and money again :(
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Re: V6 oil level sensor location/photo of
« Reply #23 on: 12 January 2019, 19:18:34 »

Thanks for further clarification,Jim.

Problem is lots of cost in seals and gaskets just to get to them and as only recently had belt/pullies done and both cam covers gaskets I will need to weigh up...dirty engine or lots of work and money again :(

Leave it til the next time your in that area ;-)
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Re: V6 oil level sensor location/photo of
« Reply #24 on: 12 January 2019, 23:00:37 »

Wise words and that will be my plan  :y,although I may start accumulating the bits for future if I find them going cheap.
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Nick W

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Re: V6 oil level sensor location/photo of
« Reply #25 on: 13 January 2019, 22:04:21 »

Thanks for further clarification,Jim.

Problem is lots of cost in seals and gaskets just to get to them and as only recently had belt/pullies done and both cam covers gaskets I will need to weigh up...dirty engine or lots of work and money again :(


cam seals are less than a tenner for all four, and don't you have the crank seal already? The worst bit of the job is loosening the crank bolt. Although there's quite a lot of dismantling to reach the cam seals I don't think there's any need to actually remove the cams themselves. I would suggest a thermostat as it's easily removed with the transfer tube attached when the cam pulleys are out of the way.


You know my opinion of cam cover gaskets and the costs involved.


It's a lot of work, so I'd probably leave it unless the oil is gushing out.
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amba

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Re: V6 oil level sensor location/photo of
« Reply #26 on: 13 January 2019, 22:30:31 »

I intend to monitor it for the next few weeks ,but it is definitely getting a worse leak as I tend cleaning it with watering can with a little clean water almost everyday and the following day it is as bad.


Maybe we can have a chat at some point Nick ,when I,m passing next Ill call by if that's ok  :y 
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Nick W

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Re: V6 oil level sensor location/photo of
« Reply #27 on: 13 January 2019, 22:33:10 »

I intend to monitor it for the next few weeks ,but it is definitely getting a worse leak as I tend cleaning it with watering can with a little clean water almost everyday and the following day it is as bad.


Maybe we can have a chat at some point Nick ,when I,m passing next Ill call by if that's ok  :y


I'm in and out a lot at the moment, it's probably better if I call you.....
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Re: V6 oil level sensor location/photo of
« Reply #28 on: 14 January 2019, 08:21:50 »

That's fine Nick....if cars on driveway Im in :y
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