Thread: Crankcase excessive oil

First thing they would check is the crankcase vent system i would guess , not uncommon to be the first thing to look at on any engine with oil use and leaks .

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Originally Posted by PLR

First thing they would check is the crankcase vent system i would guess , not uncommon to be the first thing to look at on any engine with oil use and leaks .

Would you say this is a minor issue?

Could there be an underlying reason for this, or combination of valve stem seal failing? Noticed a lot of issues with these seals online when tones of n63s needing these replaced costing a mozza!
If oil has made its way into the combustion chamber through the vent pipes could that cause harm to trubos, engine?

Just feels like replacing crankcase vents and or covers will just bandage the real problem(s) it's just a matter of time will do it again.

Worn valve stem seals don't usually cause excess breather fumes, but let more oil into the cylinders at low speed and just after starting the engine. Fumes are generally from blocked breathers as mentioned or in the worst case from worn piston rings. Oil usage could be from rings as mentioned, or oil dilution. However, 1 litre in 3000km isn't really the sign of a dead engine, just one that needs slightly more frequent looking at. The air filter box should be inspected closely for dust leakage into the engine, possibly from a poorly fitted element.

Originally Posted by bee utey

Worn valve stem seals don't usually cause excess breather fumes, but let more oil into the cylinders at low speed and just after starting the engine. Fumes are generally from blocked breathers as mentioned or in the worst case from worn piston rings. Oil usage could be from rings as mentioned, or oil dilution. However, 1 litre in 3000km isn't really the sign of a dead engine, just one that needs slightly more frequent looking at. The air filter box should be inspected closely for dust leakage into the engine, possibly from a poorly fitted element.

But the vent system is leaking oil which is burning off the engine and causing smoking. Should the vent tubes only have fumes/gases and not actually have oil in them to drip?

Having a liquid(oil) in pipes that is only for gases, that might even be venting into the turbo intake can't be good right?

Originally Posted by 12rrs

Would you say this is a minor issue?

Could there be an underlying reason for this, or combination of valve stem seal failing? Noticed a lot of issues with these seals online when tones of n63s needing these replaced costing a mozza!
If oil has made its way into the combustion chamber through the vent pipes could that cause harm to trubos, engine?

Just feels like replacing crankcase vents and or covers will just bandage the real problem(s) it's just a matter of time will do it again.

G`day , i don`t know anything about your engine just that the crankcase breathers will do what you are saying .

Early L322 Range Rovers use BMW engines one a V8 petrol and a straight 6 diesel .

If the crankcase breathers don`t work right or a blocked etc both will have issues with oil .

The V8 is just a replacement with the same , the diesel can have a different type fitted that does away with the filter and that is the end of it .

The V8 has a diaphragm which can fail , the diesel has a filter which can block .

The diesel has a turbo and it can be a problem for it , i don`t know how your engine is oiled so don`t know how it will affect your turbos .

Do a search for N63 turbo failures and if common Google will give a cause .


edit

You`ll read in the problems the TU has a catch can and it says doesn`t suffer from clogged oil separator valves which will be part of the crankcase vent system .

It talks of valve stem seal and smoke when the engine has warmed .

If you do a search for N62 valve stem seal faults that may tell you some more as it says shared fault with N63


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Thanks guys. Been really helpful.

List of problems for this engine Is huge. Kinda regret buying it.

Just have to look after her with extra care, super frequent oil changes and keep a close eye on everything else. Maybe bonnet up after a long trips to help heat get out and hooking up a trickle charger to extend battery life. Maybe slowly carry out the US recall my self by replacing the listed parts mentioned in recall over time.

Would you say the blocked vents etc be covered under stat warranty? Really don't want to pay for such an issue a month after purchase.

Originally Posted by 12rrs

Thanks guys. Been really helpful.

List of problems for this engine Is huge. Kinda regret buying it.

Just have to look after her with extra care, super frequent oil changes and keep a close eye on everything else. Maybe bonnet up after a long trips to help heat get out and hooking up a trickle charger to extend battery life. Maybe slowly carry out the US recall my self by replacing the listed parts mentioned in recall over time.

Would you say the blocked vents etc be covered under stat warranty? Really don't want to pay for such an issue a month after purchase.

G`day ,

i`m often very wrong about this type of thing ( the people thing ) and what seems obvious to me shows a totally different reaction from what i would expect but if they are decent types they will look after it for you and as it would be fire risk leaking under the turbos , i`d say they would have little choice but to repair it , with warranty on the repair .

They have proven that when dealing with them you need to work from worst case to best case scenario and not what i`d say is the normal way of the other direction also Emails give a record as do phone records and if able recordings of phone calls .

Your aware of the stem seal and ring oil use and at least you know that can be an engine fault and maybe it will not necessarily be your problem with the oil at present . ( could be but doesn`t have to be )

On the net you only read of the fails very rarely do you read when things are going well so it`s a one sided story as with your engine , i would think .

I think your right to pursue the stem seal issue at the same time having the crankcase breathing fixed .

Once you get it back and they say the oil problem is fixed it maybe an idea in a short time to put quite a few ks on it to be sure the oil problem is correct .