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Provent and Turbo Lube
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=36539		 Page 1 of 2
Author:  jmoomaw [ Mon Oct 06, 2008 6:07 pm ]
Post subject:  Provent and Turbo Lube
I was showing off my Provent Mod to a local man curious about a diesel Jeep. He asked about the lubrication on the turbo because his understanding of the oil vented into it as the source of lube for the turbo.

Not understanding enough I couldn't respond. I will be talking to him in a few weeks....it would be nice to have an answer for him and he got me thinking also....Is this a non-issue for the CRD?
Author:  Goglio704 [ Mon Oct 06, 2008 8:02 pm ]
Post subject: 
The turbo bearing is lubed by a pressurized oil line from the engine. The oil from the crankcase vent does not lube anything. It is merely a source of contamination in the intake tract.
Author:  jmoomaw [ Mon Oct 06, 2008 8:08 pm ]
Post subject:  Sounds about right....
Thanks...
Will the reduction of oil from the Provent reduce the oil that is in the CAC inlet and outlet hoses...by the sound of it..no?
Author:  CATCRD [ Mon Oct 06, 2008 8:59 pm ]
Post subject:  Re: Sounds about right....
jmoomaw wrote:
Thanks...
Will the reduction of oil from the Provent reduce the oil that is in the CAC inlet and outlet hoses...by the sound of it..no?


Absolutely it will.
Author:  jmoomaw [ Mon Oct 06, 2008 9:46 pm ]
Post subject:  Two different sources...
So the pressurized oil line from the engine lubes the turbo and oil filled air filtered out by the Provent is the air forced by the turbo into the fuel line? I may be stating the obvious to some...

Someone should write a book...."Understanding your CRD for Dummies"

Thanks,
Author:  05infernoCRDL [ Tue Oct 07, 2008 1:07 am ]
Post subject:  Re: Two different sources...
jmoomaw wrote:
So the pressurized oil line from the engine lubes the turbo and oil filled air filtered out by the Provent is the air forced by the turbo into the fuel line? I may be stating the obvious to some...

Someone should write a book...."Understanding your CRD for Dummies"

Thanks,


kinda but no.....

the crank case is slightly pressurised... while your engine is running take
off the oil filler cap.... you'll see vapor coming out... that is the air oil mix
that is going into your provent and bein filtered...

with out your provent that same oil is being introduced to your intake, being
blown through your IC hoses and IC then being burnt.. and building up a messy
hell as it passes through

the lubrication for the bearings of the turbo are supplied by a low pressure
oil hose coming off your oil oump... then drains via gravity back to your pan

the oil from your oil supply to the bearings should never enter the compressor
housing of the turbo... if it does you have issues and will see mucho black smoke
and lose oil fast
Author:  mackruss [ Tue Oct 07, 2008 4:32 am ]
Post subject: 
Goglio704 wrote:
The turbo bearing is lubed by a pressurized oil line from the engine. The oil from the crankcase vent does not lube anything. It is merely a source of contamination in the intake tract.


Mmmmm, that would mean that the lifespan of the turbo is also dependant on the quality and frequency of oil changes.

What is the expected lifespan of the turbo just as a matter of interest.
Author:  cerich [ Tue Oct 07, 2008 9:27 am ]
Post subject: 
mackruss wrote:
Goglio704 wrote:
The turbo bearing is lubed by a pressurized oil line from the engine. The oil from the crankcase vent does not lube anything. It is merely a source of contamination in the intake tract.


Mmmmm, that would mean that the lifespan of the turbo is also dependant on the quality and frequency of oil changes.

What is the expected lifespan of the turbo just as a matter of interest.


and making sure you allow the turbo to cool before you shut the engine off. On a long/hot/fast drive the turbo can be very freaking hot and if you just shut the engine off without giving it some time to cool the oil can actually gum up the works. Obviously more a problem with dino oil (which we shouldn't use in our CRD's) but still a concern with syn. as well.
Author:  UFO [ Tue Oct 07, 2008 12:33 pm ]
Post subject: 
mackruss wrote:
Goglio704 wrote:
The turbo bearing is lubed by a pressurized oil line from the engine. The oil from the crankcase vent does not lube anything. It is merely a source of contamination in the intake tract.


Mmmmm, that would mean that the lifespan of the turbo is also dependant on the quality and frequency of oil changes.

What is the expected lifespan of the turbo just as a matter of interest.
I expect my turbo to last as long as the engine, like my Mercedes. So far it has 200k miles.
Author:  mackruss [ Tue Oct 07, 2008 1:25 pm ]
Post subject: 
UFO wrote:
mackruss wrote:
Goglio704 wrote:
The turbo bearing is lubed by a pressurized oil line from the engine. The oil from the crankcase vent does not lube anything. It is merely a source of contamination in the intake tract.


Mmmmm, that would mean that the lifespan of the turbo is also dependant on the quality and frequency of oil changes.

What is the expected lifespan of the turbo just as a matter of interest.
I expect my turbo to last as long as the engine, like my Mercedes. So far it has 200k miles.


I don't use a 100% synthetic oil , I use 10W40 Mobil S which is partly synthetic.

Somehow i don't think my owners manual says use synthetic oil only :?
Author:  UFO [ Tue Oct 07, 2008 3:24 pm ]
Post subject: 
mackruss wrote:
UFO wrote:
mackruss wrote:
Goglio704 wrote:
The turbo bearing is lubed by a pressurized oil line from the engine. The oil from the crankcase vent does not lube anything. It is merely a source of contamination in the intake tract.


Mmmmm, that would mean that the lifespan of the turbo is also dependant on the quality and frequency of oil changes.

What is the expected lifespan of the turbo just as a matter of interest.
I expect my turbo to last as long as the engine, like my Mercedes. So far it has 200k miles.


I don't use a 100% synthetic oil , I use 10W40 Mobil S which is partly synthetic.

Somehow i don't think my owners manual says use synthetic oil only :?
I've never used synthetic in the Mercedes. It just gets changed 3x a year, whether it needs it or not.
Author:  mackruss [ Tue Oct 07, 2008 3:29 pm ]
Post subject: 
What's the big fuss over synthetic oils then.
Author:  cerich [ Tue Oct 07, 2008 3:35 pm ]
Post subject: 
UFO wrote:
mackruss wrote:
UFO wrote:
mackruss wrote:
Goglio704 wrote:
The turbo bearing is lubed by a pressurized oil line from the engine. The oil from the crankcase vent does not lube anything. It is merely a source of contamination in the intake tract.


Mmmmm, that would mean that the lifespan of the turbo is also dependant on the quality and frequency of oil changes.

What is the expected lifespan of the turbo just as a matter of interest.
I expect my turbo to last as long as the engine, like my Mercedes. So far it has 200k miles.


I don't use a 100% synthetic oil , I use 10W40 Mobil S which is partly synthetic.

Somehow i don't think my owners manual says use synthetic oil only :?
I've never used synthetic in the Mercedes. It just gets changed 3x a year, whether it needs it or not.


that is fine...my point however is that you are more likely to have turbo issues with poor/no cool downs using dino oil than syn. That is a fact, whatever you do and it works for you by all means continue to do so.
Author:  mackruss [ Tue Oct 07, 2008 3:43 pm ]
Post subject: 
cerich wrote:
UFO wrote:
mackruss wrote:
UFO wrote:
mackruss wrote:
Goglio704 wrote:
The turbo bearing is lubed by a pressurized oil line from the engine. The oil from the crankcase vent does not lube anything. It is merely a source of contamination in the intake tract.


Mmmmm, that would mean that the lifespan of the turbo is also dependant on the quality and frequency of oil changes.

What is the expected lifespan of the turbo just as a matter of interest.
I expect my turbo to last as long as the engine, like my Mercedes. So far it has 200k miles.


I don't use a 100% synthetic oil , I use 10W40 Mobil S which is partly synthetic.

Somehow i don't think my owners manual says use synthetic oil only :?
I've never used synthetic in the Mercedes. It just gets changed 3x a year, whether it needs it or not.


that is fine...my point however is that you are more likely to have turbo issues with poor/no cool downs using dino oil than syn. That is a fact, whatever you do and it works for you by all means continue to do so.


Well if you consider the cost of replacing a blown turbo versus the extra cost of using synthetic over mineral oil then i'd rather switch to synthetic.
Author:  UFO [ Tue Oct 07, 2008 3:45 pm ]
Post subject: 
cerich wrote:
UFO wrote:
mackruss wrote:
UFO wrote:
mackruss wrote:
Goglio704 wrote:
The turbo bearing is lubed by a pressurized oil line from the engine. The oil from the crankcase vent does not lube anything. It is merely a source of contamination in the intake tract.


Mmmmm, that would mean that the lifespan of the turbo is also dependant on the quality and frequency of oil changes.

What is the expected lifespan of the turbo just as a matter of interest.
I expect my turbo to last as long as the engine, like my Mercedes. So far it has 200k miles.


I don't use a 100% synthetic oil , I use 10W40 Mobil S which is partly synthetic.

Somehow i don't think my owners manual says use synthetic oil only :?
I've never used synthetic in the Mercedes. It just gets changed 3x a year, whether it needs it or not.


that is fine...my point however is that you are more likely to have turbo issues with poor/no cool downs using dino oil than syn. That is a fact, whatever you do and it works for you by all means continue to do so.
That was my point as well, and as long as you follow the manual's recommendation on oil, your turbo better last the life of the engine -- that should be the expectation. If you are going to use a substandard oil, be more concerned for the engine itself.
Author:  ATXKJ [ Tue Oct 07, 2008 4:25 pm ]
Post subject: 
mackruss
I don't know about the SA manuals - but our owners manual specifically calls for synthetic. (actually they prefer Mobil 1 but can't require it)

technically the molecules in a synthetic are more uniform than a standard oil so it's more resistant to breakdown.
(although most oils are changed because you've trapped contamination in the oil and you're trying to remove that - not oil breakdown.)
Author:  cerich [ Tue Oct 07, 2008 4:29 pm ]
Post subject: 
it is not just the ability of synt. to resist breakdown, they also handle higher temperatures without cooking into a goop.
Author:  mackruss [ Tue Oct 07, 2008 4:33 pm ]
Post subject: 
ATXKJ wrote:
mackruss
I don't know about the SA manuals - but our owners manual specifically calls for synthetic. (actually they prefer Mobil 1 but can't require it)

technically the molecules in a synthetic are more uniform than a standard oil so it's more resistant to breakdown.
(although most oils are changed because you've trapped contamination in the oil and you're trying to remove that - not oil breakdown.)


My service intervals were/are at 20k (km's) and i don't know what oil the dealer was using but out of warranty now and i'm doing my own oil change at every 10k. I was told that by using synthetic oil you could go for 20k intervals to gain benefit of the extra cost or go mineral and change every 10k.
Author:  cerich [ Tue Oct 07, 2008 4:37 pm ]
Post subject: 
mackruss wrote:
ATXKJ wrote:
mackruss
I don't know about the SA manuals - but our owners manual specifically calls for synthetic. (actually they prefer Mobil 1 but can't require it)

technically the molecules in a synthetic are more uniform than a standard oil so it's more resistant to breakdown.
(although most oils are changed because you've trapped contamination in the oil and you're trying to remove that - not oil breakdown.)


My service intervals were/are at 20k (km's) and i don't know what oil the dealer was using but out of warranty now and i'm doing my own oil change at every 10k. I was told that by using synthetic oil you could go for 20k intervals to gain benefit of the extra cost or go mineral and change every 10k.


at every 10K in SA i would be changing with a synt., You have heat and dirt and traffic. All bad.
Author:  mackruss [ Tue Oct 07, 2008 4:41 pm ]
Post subject: 
cerich wrote:
mackruss wrote:
ATXKJ wrote:
mackruss
I don't know about the SA manuals - but our owners manual specifically calls for synthetic. (actually they prefer Mobil 1 but can't require it)

technically the molecules in a synthetic are more uniform than a standard oil so it's more resistant to breakdown.
(although most oils are changed because you've trapped contamination in the oil and you're trying to remove that - not oil breakdown.)


My service intervals were/are at 20k (km's) and i don't know what oil the dealer was using but out of warranty now and i'm doing my own oil change at every 10k. I was told that by using synthetic oil you could go for 20k intervals to gain benefit of the extra cost or go mineral and change every 10k.


at every 10K in SA i would be changing with a synt., You have heat and dirt and traffic. All bad.


What weight oil would you recommend then to handle the heat, where i come from it gets pretty darn hot!
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