[Superdaaan]

Hi, apologies if in the wrong section, but here goes.

Bought a 307 2 days ago. All was good until half way home when the low oil pressure warning comes on everytime i stop.

Replaced the pressure switch, no good. Do i have to drain the oil before i inspect the filter? Will it P*ss oil out if i don't?

Bricking it incase i have bought a lemon at this stage!

Thanks in advance!

 

[johnbrander]

Engine size year etc would help a bit !

 

[Superdaaan]

Sorry! 1.4 zest, petrol 2004

 

[madbadandold]

No to draining the oil to change the filter. Just let it cool down a bit if you have just run it. Better still to do it when cold. Don't forget to oil the O ring on the filter and hand tight only but not a limp hand, as tight as you can get it.
You have a 3 month warranty if you have proof of purchase by law unless you accepted sold as seen and even then that is still challengeable if you asked him/her were there any faults known. If I were you I would take it back to them and see what there response is before starting to pay out more cash.

 

[Superdaaan]

Thanks for the reply. Took the filter out, there is no spigot? Should there be? Just a cylinder filter and the spring was under neath the filter, should it be on top?

 

[DazzerNO1]

Having the exact same issue with same car but 2007 bought from dealership. So far they have changed the sensor, replaced lol filter twice and now they have ordered a modified sensor. Back in on Tuesday to try again.

 

[nre124]

Any updates if u managed to get it fixed ?

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[JohnRN]

307 1.6HDi

sorry this is a long one. I have the same problem with my 307 diesel. engine was recently overhauled and bearings where checked and ok, all seals replaced, oil filter housing checked and ok with new filter, oil suction pipe is clear of debris and you can see the oil churning in the engine when the oil filler cap is off. This only happens at idle and not when engine runs up. Oil used was 5-30w so used 10-30. Oil pressure sensor has been changed to no effect. What I do have is a slight leak when warmed up from the crankshaft side because I never changed that seal because it looked ok (someting I am now regretting). another replacement oil filter to no effect.
If I start the engine with a little bit of rev's the oil pressure light does not come on, only when it idles. If you rev up the warning stops but comes back on as soon as it goes back to Idle.
Does anyone have any idea ?
It does look like I will have to pull the engine out again to repalce the crankshaft seal so any thoughts of what could be causing this fault will be much appreciated.
I will post updates solved or not
cheers :thumb:

 

[nre124]

I changed oil and filter...but it still happens at low speeds once engine temp gauge hits 90..can it be sensor ??

Also happens when stopping on slopes !!

Mine is a petrol and i use 5w40

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[nre124]

My issue is totally gone after a recent oil filter and oil change...might be helpful to someone...i put 5w30 instead of 5w40 this time...

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[madbadandold]

The oil filter being blocked or partially blocked would/could have caused it but the oil type would not have

 

[JohnRN]

Sorted!

sorry this is a long one. I have the same problem with my 307 diesel. engine was recently overhauled and bearings where checked and ok, all seals replaced, oil filter housing checked and ok with new filter, oil suction pipe is clear of debris and you can see the oil churning in the engine when the oil filler cap is off. This only happens at idle and not when engine runs up. Oil used was 5-30w so used 10-30. Oil pressure sensor has been changed to no effect. What I do have is a slight leak when warmed up from the crankshaft side because I never changed that seal because it looked ok (someting I am now regretting). another replacement oil filter to no effect.
If I start the engine with a little bit of rev's the oil pressure light does not come on, only when it idles. If you rev up the warning stops but comes back on as soon as it goes back to Idle.
Does anyone have any idea ?
It does look like I will have to pull the engine out again to repalce the crankshaft seal so any thoughts of what could be causing this fault will be much appreciated.
I will post updates solved or not
cheers :thumb:

Right Unbeliveable the Problem was too much oil by .1L! I thought the max was 3.5L and not 3.4 and that 10th of a Litre was causing my LOW oil pressure switch to operate even though it was a High oil pressure. Was not a fluke either as soon as I realised I was putting in most of a 4L bottle in when I could only get 4 1L ones and put three in and forgot about the the 4th one coz I got distracted. its not come back since

 

[madbadandold]

Yes overfilling is just as bad as underfilling.

 

[rustyroger]

Overfilling can have the effect of the oil being aerated by the crankshaft dipping into the oil bath as it turns.
More than ever with modern engines it is very important to use the manufacturers recommended oil or precise equivalent, in the correct quantities.
The days of just pouring in cheap 20w50 are long gone, this is reflected in part by how much longer a properly maintained engine will last compared to previous generations.

Roger.

 

[madbadandold]

Modern engines use better quality materials and are manufactured to far finer tolerances than the old generation is the main reason they last longer as well as good servicing and correct oils of course .The older engines could be made to last too but people tended to skimp both on services and oil quality.