Question about Harley Davidson FLSTC Heritage Softail Classic Motorcycles

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Oil blowing back through breather pipe 1991 heratage softail

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  • Harley Davidson Master
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Hi Ghaley1, oil leaking from your air cleaner is caused by oil carryover from the engine. For what ever reason the breather system is not seperating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more exspensive ones. Start by trying the following:
1. Run your oil level half way between the add and full mark when hot.
2. Run oil breather lines from head into a TEE fitting below carb/induction module then a single line into a mini filter under frame.
3. Purchase Arlen Ness Super Sucker.
4. Replace umbrella valves and realign oil pump
5. Upgrade oil pump and cam plate
Good luck

Posted on May 28, 2015

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6ya6ya
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Posted on Jan 02, 2017

  • 2712 Answers

SOURCE: oil blow out the breather

An overfull oil tank will do it. Even if not overfull just about all harley's will blow oil out the air filter. Unless there is a bunch of oil coming out, it's not a problem What I've found is that the air filter eventually gets saturated and then starts to leak through. The level in the oil tank doesn't seem to matter. If you change the air filter the problem goes away, until the new one gets saturated and then it starts all over again. My plan is to get a K&N air filter, which you can clean yourself and save having to buy a new air filter every 4,000 miles or so.

Posted on Nov 20, 2008

  • 40 Answers

SOURCE: oil blow out the breather

too much oil; bad umbrella valves in rocker covers;

Posted on Mar 23, 2009

burgessjay69
  • 78 Answers

SOURCE: 2006 KX250F blowing oil out breather should I be concerned?

hi
ther is a chance that being over filled will blow out of the crank breather so drain off to the correct level if then the bike still does this then you have to high crank presure meaning the bore and piston/rings are badly worn
thanks jay

Posted on Jun 23, 2009

  • 31 Answers

SOURCE: i just changed oil in softail and now it is

Was this your first time changing the oil?
Sounds like you may have drained the tranny and
over-filled the motor......
Did you have a book/ manual?

Harry

Posted on Sep 11, 2009

  • 677 Answers

SOURCE: Oil blowing from breather pipe Honda 250

Mate.Sorry to tell you but the piston rings need replacing.If the motor is pulled down the piston rings will be very thin and need replacing.Possibly with a new piston as well.Seen this before.Its not too bad cost wise,but it does need to be done.Hope this helps

Posted on Oct 07, 2009

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I have a 94 softail and the dipstick poops out when it warms up


First check your oil level. You could have too much oil in the system.

You could also have a plugged breather system and pressurized oil system, crankcase and oil tank.

If you have an air filter/breather system with rubber tubes that end over the open intake area of the induction module in behind the air cleaner, sometimes people think they should not be positioned like that and bend them back and tuck them into bolt hole areas/openings in the filter backing plate casting underneath the breather tubes look like they should have the tube ends inserted into them and it the tubes are indeed bent back and the ends inserted so, this will close the tubes off and pressurize the engine internally and the oil tank and the pressure buildup will then blow the filler plug and dipstick out of the oil tank.

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1 Answer

Why is the oil coming out of the oil dip stick when we know the oil is low please help


either the engine breather is gummed up or their is piston ring blow back .check the engine breather pipe first as their is often a gauze filter in them on certain models of vehicles and without regular oil changes they become carbonised up

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1 Answer

What makes a 2005 Yamaha YZ 450 F Blow Oil Out The Crank Case Hose Into The Breather And White Smoke Out The Pipe Thanks


Hi, Shawn_luke_I oil level readings are taken when the engine has reached normal operating temperature and the usual suspects are:
1. Overfilled oil tank dipstick reading should at or below full.
2. If the sight glass is full you are running to much oil.
3. Excessive blowby caused by worn out piston rings.
4. Piston rings never properly seated.
5. Faulty breather valve or system.
6. Pinched or clogged breather line/hose.
7. Clogged or failed oil filter.
8. Contaminated oil dirt-rust-water etc.
9. Excessive oil foaming.
10. Wrong oil type not designed for your bike.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a wonderful day.
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YAMAHA YZ450F Owner Service Manual
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1 Answer

Oil system manual for a 1987 softail (evolution). oil leaking from breather of engine system.


On your '87 Softail, the engine breather vent is behind and below the oil pump. The air from the breather is routed into the engine air filter by a metal pipe and rubber tubing that runs from the breather vent to the air filter. It is common to get a bit of oil in the air filter because of this system. The system was designed to meet EPA regulations of the time. Since then, the breather system has been modified to allow the engine to breathe at the top of the heads instead of down low on the engine. This resolves some of the problem with oil getting into the air filter but it still does not eliminate it. The only way to eliminate the oil from getting into the air filter is to reroute the air from the crankcase breather vent to somewhere else. Most people just let it exhaust underneath the bike by putting a small breather filter on the end of a short piece of rubber hose connected to the breather vent.

Good Luck
Steve

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1 Answer

1991 freelander stalling


on the inlet manifold is a breather from the engine i think on this year so check for a split vacumn hose or a split breather pipe ,failing which it could be the thingy on the back end of the butterfly ,their is a sensor but iam pretty sure its a breather pipe or something stupid ,also pull the vac pipe out of the servo and just try pùtting a plug into pipe in case the servo diaphram has split

May 27, 2010 | 2002 Land Rover Freelander

1 Answer

Peugeot 405 oil blows out of the oil filler


yes their is a breather pipe but if its that bad then either its completly blocked or you need a engine rebuild.The breather is on the front of the engine with a pipe running to the air intake and the dip stick is in the top

Mar 03, 2009 | 1991 Peugeot 405

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