From sad experience, I can report:
Low oil pressure light is usually a faulty switch…but if it’s not, it’s faulty main bearings (or soon will be).
Sabretooth:
Am I to understand that when you do your Morning Pre Trip Inspection (walk around ) you don’t physically check your fluids ?
Most trucks no longer have the means for the driver to check the oil manually with a distinct, and most coolant overflow tanks are either black, or so un-see-through, that you can not check levels anyway. If you ask, most places will tell you to go by the read out on the dash.
Which makes checking oil tricky if you double shift vehicles, as they often haven’t stood still long enough for the sensors to take an oil level reading.
Franglais:
Sabretooth:
Seriously !!! You don’t know ■■
Low oil gives a low oil pressure, High Level gives a High Pressure reading.I will leave this little gem here.
This is also in response to peterm.
Obviously you have never studied the subject of Volumes related to Pressure, (Less Volume Lower Pressure, Higher volume Higher Pressure) Basically if you have low oil pressure the oil pump can’t push the oil around the engine, which means parts of the engine are not lubricated to the manufactures recommendations. Too much oil creates to much pressure which will cause a seal or major part to brake.
You make a good argument of why there should be a lengthy Apprenticeship for Truck Drivers. As I have said before Hungarian Camion, have a Truck Driving University, All their Drivers are graduates of it and know everything about a truck and how to fix it on the side of the road.
Nodding Donkey, I appreciate your words of Wisdom, however this was the OP’s original post.
Sometimes when I check the oil, I get this.
Am I supposed to defect it?
Or will it just burn the excess oil off?
SploomNo where does he say anything about a dipstick ! And quite honestly I find it hard to believe there is no external way of checking your oil, water and other fluids other than a gauge which can go faulty at any time or be defective from went it was made. But I will admit to my error due to the fact modern kids never learned physics and spent their time playing computer games. Again in the old days you checked your fluids every morning and fixed the problem if you could ! I mean I take it no one changes their own wheels/ tires now if they have a blow out?
In which case THEY ARE NOT DRIVERS THEY ARE ROBOTS MANIPULATING ANOTHER ROBOT OF WHICH THEY HAVE NO KNOWLEDGE OFF. Basic Education seems to have gone down the drain. Long time ago we planned for the worst with a hopeful get out of jail card, there were no computers, you worked it out with pen and paper and you repaired or fitted a new part. Any big problem went into the workshop to be fixed by a Specialist Mechanic. But hey that’s over 45 years ago in a different time zone… Beam me up Scotty.If indeed manufacturers are making Vehicles where a Driver does not have to check fluids ( A Sealed Unit / System) it can only be to generate more revenue, because the vehicles will breakdown easier and need to be replaced sooner.
adam277:
Star down under.:
Could be overfilled at the last service or it could be fuel getting into the sump, indicating other and potentially serious issues. If you’ve got a truck without a dipstick, defect it as an overfilled sump can create major gasket and seal failure. You have no way of knowing how much of an overfill you have. Always cover your arse.Generally speaking its not an issue. Before they started removing dipsticks I used to check when getting this error and it was like Juddian said.
Yea, if the oil has been brimed to the top by an idiot it is a big issue. But usually its just enough to trip the sensor into thinking it has been overfilled when hot. Or sometimes when going around bends if I remember my old DAF correctly lol.
The other side of the issue was quite common being it moaning about low oil until it warmed up as well. Only ever had this issue with DAFs to be honest. (Oil warnings for no good reason) I suspect their sensors are just pretty primitive compared to other makes.
The dip stick is still there it’s just under the cab now .
Sabretooth:
Franglais:
Sabretooth:
Seriously !!! You don’t know ■■
Low oil gives a low oil pressure, High Level gives a High Pressure reading.I will leave this little gem here.
Obviously you have never studied the subject of Volumes related to Pressure, (Less Volume Lower Pressure, Higher volume Higher Pressure) Basically if you have low oil pressure the oil pump can’t push the oil around the engine, which means parts of the engine are not lubricated to the manufactures recommendations. To much oil creates to much pressure which will cause a seal or major part to brake.
You make a good argument of why there should be a lengthy Apprenticeship for Truck Drivers.
Truly…
Currywürst has forgotten his login again.
the nodding donkey:
Sabretooth:
Franglais:
Obviously you have never studied the subject of Volumes related to Pressure, (Less Volume Lower Pressure, Higher volume Higher Pressure) Basically if you have low oil pressure the oil pump can’t push the oil around the engine, which means parts of the engine are not lubricated to the manufactures recommendations. To much oil creates to much pressure which will cause a seal or major part to brake.You make a good argument of why there should be a lengthy Apprenticeship for Truck Drivers.
Truly…
Currywürst has forgotten his login again.
An overfilled sump leaves less capacity for ‘windage’ which effectively means the air pumped in the crankcase by the pistons on their respective down inlet and compression strokes.
The resulting higher crankcase pressure pressurises the sump and the inlet side of the oil pump.Resulting in a higher oil pressure than the seals are designed for.
Sabretooth:
Franglais:
Sabretooth:
Seriously !!! You don’t know ■■
Low oil gives a low oil pressure, High Level gives a High Pressure reading.I will leave this little gem here.
This is also in response to peterm.
Obviously you have never studied the subject of Volumes related to Pressure, (Less Volume Lower Pressure, Higher volume Higher Pressure) Basically if you have low oil pressure the oil pump can’t push the oil around the engine, which means parts of the engine are not lubricated to the manufactures recommendations. Too much oil creates to much pressure which will cause a seal or major part to brake.
You make a good argument of why there should be a lengthy Apprenticeship for Truck Drivers. As I have said before Hungarian Camion, have a Truck Driving University, All their Drivers are graduates of it and know everything about a truck and how to fix it on the side of the road.
Nodding Donkey, I appreciate your words of Wisdom, however this was the OP’s original post.
Sometimes when I check the oil, I get this.
Am I supposed to defect it?
Or will it just burn the excess oil off?
SploomNo where does he say anything about a dipstick ! And quite honestly I find it hard to believe there is no external way of checking your oil, water and other fluids other than a gauge which can go faulty at any time or be defective from went it was made. But I will admit to my error due to the fact modern kids never learned physics and spent their time playing computer games. Again in the old days you checked your fluids every morning and fixed the problem if you could ! I mean I take it no one changes their own wheels/ tires now if they have a blow out?
In which case THEY ARE NOT DRIVERS THEY ARE ROBOTS MANIPULATING ANOTHER ROBOT OF WHICH THEY HAVE NO KNOWLEDGE OFF. Basic Education seems to have gone down the drain. Long time ago we planned for the worst with a hopeful get out of jail card, there were no computers, you worked it out with pen and paper and you repaired or fitted a new part. Any big problem went into the workshop to be fixed by a Specialist Mechanic. But hey that’s over 45 years ago in a different time zone… Beam me up Scotty.If indeed manufacturers are making Vehicles where a Driver does not have to check fluids ( A Sealed Unit / System) it can only be to generate more revenue, because the vehicles will breakdown easier and need to be replaced sooner.
Words of wisdom indeed… not. A higher head of liquid will give more pressure, think water towers. A lower head gives less pressure. In an engine there is no head of oil, it’s the pump that does the work. The pump is above the oil.The oil pressure will remain the same until the level gets dangerously low, meaning there’s no oil left for the pump to pump. Low oil pressure usually means worn bearings or a faulty pump. Back to school for you.
Thanks for the replies,exvept the condescending ones.
I wish we could have a forum where we could write what we want without about patronising comments.It would be better for us all because there would be more content on here,more things to discuss ,drivers would be more willing to admit their mistakes,oh well,anyway,Im waffling now…
Sploom:
Thanks for the replies,exvept the condescending ones.
I wish we could have a forum where we could write what we want without about patronising comments.It would be better for us all because there would be more content on here,more things to discuss ,drivers would be more willing to admit their mistakes,oh well,anyway,Im waffling now…
As an advocate for freedom of speech I disagree.
A world in which people only said nice stuff is a world in which your not getting peoples true views/beliefs.
Even the guys here that post condescending crap often add something to the discussion, you just gotta learn to ignore their ■■■■■■■■ and your good 
.
peterm,
Words of wisdom indeed… not. A higher head of liquid will give more pressure, think water towers. A lower head gives less pressure. In an engine there is no head of oil, it’s the pump that does the work. The pump is above the oil.The oil pressure will remain the same until the level gets dangerously low, meaning there’s no oil left for the pump to pump. Low oil pressure usually means worn bearings or a faulty pump. Back to school for you.
I guess Physics is a foreign language to you, because you have no idea what your talking about,
A Water Tower uses Gravity to Empty,
And talking of Heads, If you had a Dozen Brains you’d still be lonely,
Sabretooth:
I guess Physics is a foreign language to you, because you have no idea what your talking about,
A Water Tower uses Gravity to Empty,And talking of Heads, If you had a Dozen Brains you’d still be lonely,
Said the person who wants less condescension, while being wrong. (An oil pump fed by oil in a sump, pressure is obviously not dependent on oil level.)
Sabretooth:
peterm,
Words of wisdom indeed… not. A higher head of liquid will give more pressure, think water towers. A lower head gives less pressure. In an engine there is no head of oil, it’s the pump that does the work. The pump is above the oil.The oil pressure will remain the same until the level gets dangerously low, meaning there’s no oil left for the pump to pump. Low oil pressure usually means worn bearings or a faulty pump. Back to school for you.I guess Physics is a foreign language to you, because you have no idea what your talking about,
A Water Tower uses Gravity to Empty,And talking of Heads, If you had a Dozen Brains you’d still be lonely,
Why do people who are proven wrong have to be so abusive?
Peterm is right, the pump will make the same pressure until it starts sucking air. Pressure can be lowered if the pump is worn, or bled off if the bearings and/or lubricated surfaces are worn, or the oil galleries are leaking.
the nodding donkey:
Currywürst has forgotten his login again.
Either that, or our Fridge Fixer has a cousin?
Star down under.:
Peterm is right, the pump will make the same pressure until it starts sucking air. Pressure can be lowered if the pump is worn, or bled off if the bearings and/or lubricated surfaces are worn, or the oil galleries are leaking.
Absolutely.
Don`t overlook the obvious: Pressure gauges, measure pressure, not levels.
adam277:
Sploom:
Thanks for the replies,exvept the condescending ones.
I wish we could have a forum where we could write what we want without about patronising comments.It would be better for us all because there would be more content on here,more things to discuss ,drivers would be more willing to admit their mistakes,oh well,anyway,Im waffling now…As an advocate for freedom of speech I disagree.
A world in which people only said nice stuff is a world in which your not getting peoples true views/beliefs.
Even the guys here that post condescending crap often add something to the discussion, you just gotta learn to ignore their [zb] and your good
It should be possible to tell people that they are wrong or mistaken in a reasonable way.
Some take being corrected as an insult, no matter how well it`s phrased.
Facts and evidence, are different to opinions and beliefs.
Sabretooth:
Am I to understand that when you do your Morning Pre Trip Inspection (walk around ) you don’t physically check your fluids ?
Coolant & brake & washer fluid yes as just a flip of the front, oil no as I’ve gotta tip the cab forward to dipstick it, so do check it monthly but not daily just trust the dash gauge to be correct, which when I check on dipstick is same level.
Sabretooth:
peterm,
Words of wisdom indeed… not. A higher head of liquid will give more pressure, think water towers. A lower head gives less pressure. In an engine there is no head of oil, it’s the pump that does the work. The pump is above the oil.The oil pressure will remain the same until the level gets dangerously low, meaning there’s no oil left for the pump to pump. Low oil pressure usually means worn bearings or a faulty pump. Back to school for you.I guess Physics is a foreign language to you, because you have no idea what your talking about,
A Water Tower uses Gravity to Empty,And talking of Heads, If you had a Dozen Brains you’d still be lonely,
Well I can see I’m getting to you when you start the personal insults. I was using a water tower as an analogy (look it up). As I said, the pump is above the oil and will, as Star down under said pump at the same pressure until it runs out of oil. There is negligible head of oil in a sump.
peterm:
Sabretooth:
peterm,
Words of wisdom indeed… not. A higher head of liquid will give more pressure, think water towers. A lower head gives less pressure. In an engine there is no head of oil, it’s the pump that does the work. The pump is above the oil.The oil pressure will remain the same until the level gets dangerously low, meaning there’s no oil left for the pump to pump. Low oil pressure usually means worn bearings or a faulty pump. Back to school for you.I guess Physics is a foreign language to you, because you have no idea what your talking about,
A Water Tower uses Gravity to Empty,And talking of Heads, If you had a Dozen Brains you’d still be lonely,
Well I can see I’m getting to you when you start the personal insults. I was using a water tower as an analogy (look it up). As I said, the pump is above the oil and will, as Star down under said pump at the same pressure until it runs out of oil. There is negligible head of oil in a sump.
Windage stays the same acting in a reduced volume of space.Wich means higher crankcase pressure which the crankcase ventilation system isn’t designed for.Which also means the equivalent higher crankcase pressure acting on the oil in the sump.
Thereby also at the oil seals and at the inlet side of the pump.
Feel free to put an extra few litres or a gallon of oil in over the full mark for luck.
iguana:
Sabretooth:
Am I to understand that when you do your Morning Pre Trip Inspection (walk around ) you don’t physically check your fluids ?Coolant & brake & washer fluid yes as just a flip of the front, oil no as I’ve gotta tip the cab forward to dipstick it, so do check it monthly but not daily just trust the dash gauge to be correct, which when I check on dipstick is same level.
I got laughed at when I said I checked my brake fluid daily. But that was when I was only in 7.5t.
There are no fluid checks possible that I can do now on my brand new Actros.
i had an engine the oil level used to climb a bit over time. Probably was worn injectors
corij:
i had an engine the oil level used to climb a bit over time. Probably was worn injectors
No, it wasn’t worn injectors.
Injectors are a bit like spark plugs. They inject into the cylinders. Any excess is returned to the fuel tank via their return pipes.
There is nowhere else for the fuel to go. It can’t go directly from worn injectors to sump, there is no pathway.
And the injector pump was a completely separate unit, so no pathway there either.
If you had diesel getting into the engine oil, it had to be going past the piston rings. That your oil level was climbing slowly also suggests that.
Diesel is injected into the cylinder a bit before Top Dead Centre. The piston is still rising at injection point. It continues rising and compressing the fuel/air mix. The top of the piston is shaped to maximise swirl, created by this compression, in order to further mix the fuel throughout the compressing air. This gives a better, more efficient burn, when the compression reaches ignition pressure.
Because of the microsecond of delay between injection and ignition, that gives time for (air and) fuel to pass worn rings (and soot, after ignition). That is why your oil level was slowly climbing.