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Re: Anyone relocate their oil vent line? [Re: Chris99] #690549
24/02/21 03:12 PM
24/02/21 03:12 PM
Joined: Dec 2017
Posts: 1,114
Evergreen, Colorado, USA
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Evergreen, Colorado, USA
Originally Posted by Chris99
Originally Posted by LightSpeed
Originally Posted by Chris99
Originally Posted by LightSpeed


The bottom line on the engine drain the tank.

And if you are just blowing air up a hose that is connected to the tank you will be blowing crap up into the clean oil. I would disconnect the line at both ends and then clean it.


Which is what I think R1NGA is saying


It is a 6 liter tank so what good is a two liter bottle?


As I read it he is disconnecting both ends of the breather hose and then using an air pump to blow the gunk out of the breather pipe into the bottle.


Agree that is what R1NGA is saying and it is what I do too, in my case I used my compressor to blow through and it certainly cleared the junk but I also took the precaution of relocating the pipe. It is a simple fix and easy procedure to add to the annual maintenance schedule.


Bruce
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice)
2013 M3W (Olga)
Re: Anyone relocate their oil vent line? [Re: Hogzilla] #690601
24/02/21 06:43 PM
24/02/21 06:43 PM
Joined: May 2012
Posts: 1,651
Gods own county! Oop north
D
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Joined: May 2012
Posts: 1,651
Gods own county! Oop north
Did mine this afternoon and got a fair bit of crap out. I will re-route this pipe so it has a continuous fall to the engine when I reassemble it.

I still cannot see how to vents in the tank to atmosphere when the tank cap is screwed on airtight. Unless the small vent from the top of the crank case to the throttle body does the job.

Re: Anyone relocate their oil vent line? [Re: Hogzilla] #690603
24/02/21 06:51 PM
24/02/21 06:51 PM
Joined: Feb 2018
Posts: 517
SW Iowa, U.S.A.
Bitsobrits Offline
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SW Iowa, U.S.A.
There is no vent to atmosphere, by design. That small vent through the throttle body is all that is required. And venting this way has the added benefit of creating a net negative pressure in the crankcase which aids the oil seals, as well as reducing emissions. Which is why all the OEMs went to this type of set up in the 1960's.

From an engineering perspective, going back to atmospheric venting is a retrograde step.


Steve
2012 M3W



Re: Anyone relocate their oil vent line? [Re: Bitsobrits] #690674
25/02/21 11:16 AM
25/02/21 11:16 AM
Joined: Mar 2013
Posts: 969
Guildford, UK
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Guildford, UK
Sorry for any confusion, but yes, both ends of the breather hose are disconnected when I blow the gunk out into the bottle (rather than onto the garage floor....). Ironically, my vent hose was very neatly routed and P-Clip'd by the factory during the chassis change, but I will consider re-routing with a permanent downhill slant if the mood takes me one day, but in the meantime I will just clear it out a couple of times a year using this method.

Re: Anyone relocate their oil vent line? [Re: Hogzilla] #690708
25/02/21 03:28 PM
25/02/21 03:28 PM
Joined: Feb 2018
Posts: 517
SW Iowa, U.S.A.
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SW Iowa, U.S.A.
As noted elsewhere, the whole gunk in the vent line issue goes away if you simply get the engine oil up to full operating temperature (220F+) most every time you take the vehicle out for a drive.

As my father in law once observed (with some measure of disgust) when he saw me using glass cleaner on the underside of my S1 Lotus Elan: "Just go out and drive the damn thing!"


Steve
2012 M3W



Re: Anyone relocate their oil vent line? [Re: Bitsobrits] #690713
25/02/21 04:09 PM
25/02/21 04:09 PM
Joined: Feb 2019
Posts: 1,530
New River Valley, VA
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New River Valley, VA
Originally Posted by Bitsobrits
As noted elsewhere, the whole gunk in the vent line issue goes away if you simply get the engine oil up to full operating temperature (220F+) most every time you take the vehicle out for a drive.

As my father in law once observed (with some measure of disgust) when he saw me using glass cleaner on the underside of my S1 Lotus Elan: "Just go out and drive the damn thing!"


the worse wear on an engine is the little old lady who only drives to church


Rodger
2018 M3W "Dreamers on the Rise"
2004 Plus 8 (wife's)
old Goldwings and a couple of Harleys
Re: Anyone relocate their oil vent line? [Re: rcmatt] #690717
25/02/21 04:32 PM
25/02/21 04:32 PM
Joined: May 2015
Posts: 1,209
Oxon
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Oxon
Originally Posted by rcmatt


the worse wear on an engine is the little old lady who only drives to church

The mind boggles at the idea of a little old lady driving an M3W today! Cue photo contest... wink


M3W5sp 2015, MSCC, MTWC, Oxon UK
Re: Anyone relocate their oil vent line? [Re: Hogzilla] #692385
08/03/21 01:44 PM
08/03/21 01:44 PM
Joined: Feb 2019
Posts: 1,530
New River Valley, VA
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New River Valley, VA
I relocated the line this weekend. Even though I drive to get the engine up to temp, you can see what was in the vent line
[Linked Image]

As the new line would cross over the transmission I slide it through a 7/ id hose to absorb the wear and tear. It is the shiny black hose. The clear braided hose covers the oil return hose to protect it as well

[Linked Image]


[Linked Image]


Rodger
2018 M3W "Dreamers on the Rise"
2004 Plus 8 (wife's)
old Goldwings and a couple of Harleys
Re: Anyone relocate their oil vent line? [Re: Hogzilla] #692397
08/03/21 02:27 PM
08/03/21 02:27 PM
Joined: Feb 2019
Posts: 3,140
Port Orchard, WA.
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Port Orchard, WA.
That dip in the line that MMC put there was a bad design. Your reroute and shielding should solve the problem.

Re: Anyone relocate their oil vent line? [Re: Hogzilla] #692412
08/03/21 04:10 PM
08/03/21 04:10 PM
Joined: Feb 2019
Posts: 1,530
New River Valley, VA
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Posts: 1,530
New River Valley, VA
yes there was a good 6 inches of line below the vent hole.... usually 6 inches would be a good thing grin2


Rodger
2018 M3W "Dreamers on the Rise"
2004 Plus 8 (wife's)
old Goldwings and a couple of Harleys
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