Leonard
95 posts
Joined: 10/11/2004 19:56:22
Location: Stroud United Kingdom (Excluding channel Islands)
breather
if u cover where the pipe goes into the carb with your finger, it should run ok. its just gases going back through the system to be burned in the cylinder. you can get little breather filters that look really good to put on the breather, to get rid of the pipe.
Posted: Feb 03, 2005 07:14 PM
Pirate_copy
35 posts
Joined: 31/01/2005 18:08:36
Location: United Kingdom (Excluding channel Islands)
Fuel tank Breather
Hi I have no idea there was a fuel tank breather, where is it located? Peter
Posted: Feb 16, 2005 08:55 AM
Blart
5 posts
Joined: 13/09/2004 12:13:15
Location: Reading United Kingdom (Excluding channel Islands)
Engine Breather
Can someone answer a question that Ive been wondering about for a while? What is the advantage of having the breather system plumbed into the rocker cover? I saw a picture of Keith CALVERS car in a recent copy of mini magazine and noticed that the breather from the radiator end (from the timing cover I presume) goes into one side of the rocker cover then out the other and into a catch tank with the breather from the flywheel housing. What is the idea behind connecting the rocker cover? Cheers Steve
Posted: Oct 09, 2005 09:07 PM
tom
15 posts
Joined: 15/11/2006 19:11:40
engine breathers?
Hi. I keep seeing small engine breather filters on the end of hoses. What exactly are these for? It is simply to remove the unsightly black hoses or do they actually slightly improve performance? cheers.
Posted: Dec 09, 2006 06:00 PM
John
1948 posts
Joined: 28/05/2006 16:49:46
Location: cambridge United Kingdom (Excluding channel Islands)
i think when the engine turns over gases leak round pistons to a certain extent, this can mean pressure builds up in the sump which as the pistons move resists the movement. by venting the engine well this pressure drops so there is less resistance. u could just vent it to the air but this would risk dirt geting in. i think this is right but somone could well correct me.
Posted: Dec 09, 2006 08:06 PM
J. Clegg
74 posts
Joined: 27/10/2006 20:12:54
Location: accrington United Kingdom (Excluding channel Islands)
well for start, (im my opinion, without much knowledge on breathers) i would say that Yes they will improve the engine performance because it would let the engine Breathe which will allow the pistons to accelerate faster and give an increase in power (slightly), this being because if you diddnt have a breather there would be a lot of pressure buildup in the engine and thus making it powerless, in my opinion i would say its like having a very long exhaust, then getting a Better one making it more powerfull........(gasps for air)
Posted: Dec 09, 2006 08:08 PM
Roobz
223 posts
Joined: 15/12/2005 01:31:36
Location: Redbridge United Kingdom (Excluding channel Islands)
Not totally sure however i do beleive that its not so much a performance issue,, more a case of practicality.
when pressure builds up inside of the engine it needs to go somewhere or you will blow out oils seals and other similar things. i dont think the build up is sufficient enough to effect engine power output,, but i could allways be wrong.
Richie.
Posted: Dec 10, 2006 06:37 AM
a quote from tuning the a series by david vizard. "having adequate crank case ventilation on a series A engine is important. if the engine doesnt have good ventilation it will lose some power and quickly establish every possible point for deveopling oil leaks at least 2 breathers 1/2" -5/8" bore must be fitted. for competition engine or really high performance road engines 3 or 4 breathers will be needed to keep crank case pressures from going signmificantly above atmospheric." it keeps going he goes on to recomend K&N breathers and to say your engine will burn less oil when the pressures are kept down. he also says on big engines u can stand to gain about 2bhp. he explains it in alot more detail
Posted: Dec 10, 2006 11:16 AM
J. Rolph
33 posts
Joined: 24/08/2005 23:49:02
Location: Ludlow United Kingdom (Excluding channel Islands)
Cooper engine breather
Hi, I've just bought a 1275 metro engine which I intend to put in my mini, but I have a servo and i've heard it will foul the engine breather on the flywheel housing on the metro engine. I also heard I need to get an engine breather from a cooper to get it to fit, is this true and where can I get one from?
Posted: Apr 30, 2007 10:39 AM
if the metro breather doesnt clear the servo either 1 crush it narrower to clear, 2 get a normal mini breather (one from any mini with servo fitted i.e post 84 minis i think, or 3 better yet fit a separate crankage breather. fitting these has been known to add the odd hp or 2 by lowering crank pressures that slow piston movement slightly.
http://www.minispares.com/Product.aspx?pid=35194
Posted: Apr 30, 2007 01:56 PM
mark
32 posts
Joined: 28/05/2007 15:53:57
Location: covetry United Kingdom (Excluding channel Islands)
smoke from crankcase breather
can any one help why have i got smoke comeing out of the top of my crank case breather and the top of the rocker cover filler cap its white smoke .doesnt seam to of lost any power but the smoke is a bit of a problem and would like to sort it .my mini is a mayfare with a 1275 mg engine only had the car for a month and seams like i fix one thing and a nother breaks i have changed the starter, solinoid, new battery cable ,and earth cable, battery , exhaust gaskit, rocker gasket , changed the oil and water all in the last month
please help dont want to keep spending money i dont have
Posted: May 28, 2007 05:16 PM
u sure its not just oil vapour? havnt u got beathers plugged into carb? could be steam from water if uv got headgasket problem.
Posted: May 28, 2007 06:13 PM
breater is not pluged in to carb i have fitted a small breather filter to the top .
didnt see any signs of head gasket problems well no sign of contamination in water or oil and no loss of power ticks over fine after its warmed up
just loads of smoke when reved
Posted: May 28, 2007 06:20 PM
iv heard of it causing problems before, beathers releasing smoke. try just connecting it back to carb see if it resolves.
Posted: May 28, 2007 07:07 PM
tryed that smoke just comes out of the top of the rocker cover now
Posted: May 29, 2007 09:11 PM
jimmer
55 posts
Joined: 08/11/2004 18:36:11
Location: Glastonbury United Kingdom (Excluding channel Islands)
engine breather
hello all you mini lovers im a bit worried
i have a mayfair 1992 which used to have a 998 engine and gbox but i fitted a 1275 engine and box i havent got my engine breather fitted on the clutch which orignally came with my engine because of my brake servo is in the way and
i got told that the cooper ones fit is this true if so does any one know where i can buy one from and is there a certain one i need
also without the breather fitted to the offside of the engine whats the possibiltly of engine damge and whats the effects without one fitted
many thanks people
Posted: Jul 24, 2007 08:41 PM
Clayton
53 posts
Joined: 08/07/2006 10:12:48
Location: Christchurch New Zealand
I'm assuming that the hole for the breather is there. If it isn't stop driving because certain seal failure is just around the corner.
If you don't put some kind of closed system (the pipe from breather to carbs) or a filter on you risk bits of dirt dropping onto the drop gears causing wear and getting into the oil causing more wear!
You should be able to have a flange and piece of 1/2" pipe welded together that would allow you to either put a small filter in place or some 1/2" hose up to your carbs. This would be cheap to have made up.
Sorry I know nothing about the cooper ones
Posted: Jul 25, 2007 09:20 AM
I had a similar problem and I found some persistant hammer work would bend the pipe and flatten the breather enough to make it miss the servo. However this is not a 'pretty' fix
Posted: Jul 30, 2007 12:59 PM
hi do you know if the cooper ones fit,i was thinking of heating my breather up and bending it would it be ok to heat it up
Posted: Aug 01, 2007 11:38 AM
AndyAd
13 posts
Joined: 15/01/2006 14:27:25
Location: LIVERPOOL United Kingdom (Excluding channel Islands)
Breather pipe positioning?
Hi,
I'm in the process of fitting stage 1 to my 1980 mini 1000.
In fitting an ultimate engine steady, I had to do away with the breather oil separater cannister thingy cos it obstructed the steady bar.
I have replaced the cannister type tappet inspection cover with a plain one and I have also replaced the rocker cover with a minifin item which has a small breather pipe affixed to the back.
The question is...
Is it OK to now link the rubber breather pipe from the rocker cover to the carb? or do i have to route the pipe downwards from the rocker cover near the subframe and blank off the carb breather tube (as per msc fitting instructions)?
I have seen some pictures of minis with the rocker breather pipe conneted to the standard air filter box also.
Which is the most appropriate configuration?
Cheers
Andy
Posted: Jan 15, 2008 09:57 AM