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Author Topic: blowing oil out of breather.  (Read 1315 times)

trimleyman

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blowing oil out of breather.
« on: January 14, 2013, 02:23:44 AM »
Have had this problem of late and can only pin it down to Enfields being very cold blooded. On my 2011 G5 when the temp is 40f or below oil is blown from the rh side case through the breather into the airfilter-box and exits through a vent in the front bottom edge of the airfilter-box. When it is warmer weather it all stays inside where it's 'sposed to be. Should I be changing to a slightly thinner oil in the "winter" (this is California we don't get a real winter) , say 15-40?
Now 2011 Royal Enfield G5 and just added 2014 Continental GT
Then:-
1978 Ducati 900 GTES
1969 Ducati 350 Desmo Racer
1972 Mototrans Ducati 250 24 Horas
1965 Triumph Tiger Cub 200
1967 BSA Bantum

Ducati Scotty

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Re: blowing oil out of breather.
« Reply #1 on: January 14, 2013, 05:08:56 AM »
How high do you fill your oil?  Any oil visible in the window is enough.  Many people have blowout when filled to the to mark.  You may just want to fill less in colder weather.

Scott

jartist

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Re: blowing oil out of breather.
« Reply #2 on: January 14, 2013, 03:04:38 PM »
Also, try replacing the air filter.  The dry paper one is clogged once it gets oily and makes the problem worst.

barenekd

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Re: blowing oil out of breather.
« Reply #3 on: January 14, 2013, 06:35:44 PM »
I pulled all the hoses and the can off mine and ran the one from the crankcase up over the fender and just let it blow out at the rear of the frame. Never seen any oil up there.
Bare
2013 Moto Guzzi V7 Racer
2011 Black Classic G5 (RIP)
I refuse to tiptoe through life only to arrive safely at death
http://www.controllineplans.com

no bs

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Re: blowing oil out of breather.
« Reply #4 on: January 14, 2013, 08:19:45 PM »
i did the same as barenekd, and also installed a pcv valve from a toyota 3 litre v6. as for the emission control parts, they seem to have disappeared!
killing bugs since 1972 2011 g5 deluxe

Ducati Scotty

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Re: blowing oil out of breather.
« Reply #5 on: January 14, 2013, 08:45:08 PM »
as for the emission control parts, they seem to have disappeared!

Inconceivable!

Desi Bike

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Re: blowing oil out of breather.
« Reply #6 on: January 14, 2013, 09:10:20 PM »
Inconceivable!

Call the church.
Call the police.
Call the church police!
میں نہیں چاہتا کہ ایک اچار
میں صرف اپنی موٹر سائیکل پر سوار کرنا چاہتے ہیں

trimleyman

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Re: blowing oil out of breather.
« Reply #7 on: January 15, 2013, 01:16:59 AM »
thanks for the input. Had the breather hose on my Ducati's all the way back and into a small plastic bottle with a vent. Never actually got any oil in the bottle though, but left it in place just in case (just don't like the idea of lubricated tyres). Always ran Castrol GTX 20-50 in the Ducati-s year round , but they ran much , much hotter than the Enfield which is why I wondered if a slightly lower weight oil might be the way to go. I run a K&N air-filter which does not catch much additional oil.
Now 2011 Royal Enfield G5 and just added 2014 Continental GT
Then:-
1978 Ducati 900 GTES
1969 Ducati 350 Desmo Racer
1972 Mototrans Ducati 250 24 Horas
1965 Triumph Tiger Cub 200
1967 BSA Bantum

Craig McClure

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Re: blowing oil out of breather.(nocturnal emissions)
« Reply #8 on: January 16, 2013, 05:10:46 PM »
I have extended the breather pipe of my 2010 G5 Deluxe up over the rear fender, & ended it right at the lower rear edge of the fender. I have noticed it has nocturnal emissions from this tube & keep a pie plate under it in the garage. When I got the bike there was oil in the breather box & in the air filter. I plugged the hole in my air box & used a long hose for the breather,old school style. Although blowing out is oil annoying, it is no more annoying than my many attempts to get my oil level correct, which I suspect to be the cause of the emissions. It is the only aspect of the EFI engine that I give poor marks. It should have been designed to have a definite visible correct oil level in its sump when at rest-like others, Ducati, BMW, etc. At least excess oil has an escape route, & none gets on my tire or air filter.
Best Wishes, Craig McClure

Ducati Scotty

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Re: blowing oil out of breather.
« Reply #9 on: January 16, 2013, 05:44:17 PM »
You guys could always do what the older bikes did: order the duckbill and let it exit right over the chain. 
http://nfieldgear.com/enfield-store/duckbill-breather-hose.html
Then the excess oil goes to the chain and the duckbill prevents sucking dust into the crankcase.  I would still run the breather line up to the level of the seat and then back down to limit how much blowby you get.

Scott

Arizoni

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Re: blowing oil out of breather.
« Reply #10 on: January 16, 2013, 10:55:32 PM »
I don't have a problem with the oil level sight gage working and I also don't have a problem with oil blowing out of the engine on my 2011 G5.

It's been run at 1200 feet elevation up to over 8000 feet elevation at speeds ranging from 40 mph constant to over 65 mph constant for over 8,500 miles and no crankcase oil leaks (if I ignore the slight weeping that was coming from the front rocker cover that a little Ultra-Black fixed).
Jim
2011 G5 Deluxe
1999 Miata 10th Anniversary

jartist

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Re: blowing oil out of breather.
« Reply #11 on: January 17, 2013, 06:07:23 AM »
Inconceivable!
I do not think that word means what you think it means.

trimleyman

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Re: blowing oil out of breather.
« Reply #12 on: February 03, 2013, 01:08:53 AM »
Well decided that easiest way to solve this was to run a 5 foot length of breather hose from the case over the frame to the other side and loop it back down into the airbox fitting. Result , no more oil loss. Figured it would just run back into the case.
Now 2011 Royal Enfield G5 and just added 2014 Continental GT
Then:-
1978 Ducati 900 GTES
1969 Ducati 350 Desmo Racer
1972 Mototrans Ducati 250 24 Horas
1965 Triumph Tiger Cub 200
1967 BSA Bantum

palace15

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Re: blowing oil out of breather.
« Reply #13 on: February 05, 2013, 03:59:55 PM »
I had this problem through 'over filling', minor problem compared to my possible sprag bearing! ;)
You will always find that women that have lost thier virginity, still have the box it came in!

Royal Enfield, making mechanics out of owners since 1893.

Ducati Scotty

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Re: blowing oil out of breather.
« Reply #14 on: February 05, 2013, 04:17:21 PM »
Well decided that easiest way to solve this was to run a 5 foot length of breather hose from the case over the frame to the other side and loop it back down into the airbox fitting. Result , no more oil loss. Figured it would just run back into the case.

Some newer bikes have a 'labyrinth' off the breather to deflect any blow out and let it drip back.  Same principle.

Scott