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Oil leak from the breather tubes to the air filter

2002 h-d flstf oil just started to leak out of the air cleaner and when i took it off it seems to be coming from the tubes that run from the head that runs into the 4 oclock and the 7 oclock position in the air cleaner assembly this is the first time today i just had got my oil changed and it had never happened now they leak out of both of the tubes when it runs and shortly after it has been turned off

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I have an 01 fatboy and, all of a sudden, oil is being pushed out of the air cleaner. oil is not overfull and never had this problem in 10 years and 40k miles. Replaced the umbrella valves in top end and still the same problem

Posted on Jun 13, 2011

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If you never had that problem sounds like your oil is over ful and blowing thrugh your beather (crank case vent tubes) check and lower your oil level as needed and clean or replace air filter , should fix your problem

Posted on Dec 05, 2008

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On a revtech 110 why is oil blowing out the breather tubes and head?


Hi, Chasity oil leaking from your air cleaner is caused by oil carryover from the engine. For whatever reason, the breather system is not separating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more expensive ones. First, make sure your breather hoses are not dry and cracked if they are ok you can 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 the head into a TEE fitting below carb/induction module then a single line into a mini filter under the frame.
3. Purchase Arlen Ness Super Sucker.
4. Replace umbrella valves and realign oil pump.
5. Upgrade oil pump and cam plate.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below and for more specific information or questions at no charge please feel free to contact me at xlch@mail.com. Good luck and have a nice day.
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Oct 16, 2016 | Motorcycles

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Why 1992harley pumps oil when cranking over to star


Check your oil tank level. If it is empty or very low, the oil has seeped by the oil pump check valve and has filled the engine cases with oil. I assume the oil is coming out the air cleaner breather tube? If so, add a quart or so to the oil tank, run the breather hose into a can or bottle, and start it up. Oil will flow out the breather until the cases have been purged. When it stops pumping out refill the oil tank to the proper level. This can happen when the bike has been sitting for a few months or more.

Mar 12, 2015 | 1993 Harley Davidson FLSTF Fat boy

1 Answer

I have 1998 fatboy leaking oil out of air breather i have replaced breather valve umbrella valves drilled out the holes on top but still leaking


Do you have the rubber tubes going from hollow breather bolts into the intake opening of the induction system??

Do you possibly have worn out compression rings???

Jun 04, 2014 | 2000 Harley Davidson FLSTF Fat boy

1 Answer

Oil in airbox


Hi, Anonymous oil leaking from your air cleaner is caused by oil carryover from the engine. For whatever reason, the breather system is not separating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more expensive ones. First, make sure your breather hoses are not dry and cracked if they are ok you can 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 the head into a TEE fitting below carb/induction module then a single line into a mini filter under the frame.
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 nice day.
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May 20, 2014 | 2002 Yamaha XJR 1300

1 Answer

Oil coming out of air filter in y 2002 harley


Hi Anonymous, 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

Apr 06, 2013 | Harley Davidson FXSTB Night Train...

1 Answer

Oil leaking from back of air filter


Hi Robert, 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

Jul 19, 2012 | 2002 Harley Davidson FLHR - FLHRCI Road...

1 Answer

93 Fatboy oil leaking from vent tube at air filter. oil level is good, not over filled, oil will cover the oil tank on a 100 mile trip


On your '93 model, the crankcase vent is down low on the engine behind the oil pump and it runs up to the air filter through a metal and rubber hose. I don't know how many miles you have on your engine but it you're getting any blow-by on the rings, this will increase the pressure in the crankcase. Most people simply re-route the crankcase breather underneath the bike and plug the hole on the backside of the air filter. Replace the metal line with a rubber hose and put a small filter in the end of the hose. Route the hose back behind the transmission and attach it to the transmission mounting plate just in front of the rear wheel.

This was the way the older Shovelheads were done from the factory for years until the EPA made them start running the crankcase vented air through the engine. In 1994, Harley went to the "head breather" system and moved the crankcase vents to the heads. Still, the oil mist in the vented air builds up in the air cleaner on these models as well.

Good Luck
Steve

Apr 12, 2011 | 1993 Harley Davidson FLSTF Fat boy

1 Answer

I have a 2004 fat boy and when i ride for a while there are streaks of oil on the oil can. someone said the oil breather tube might be clogged. can you tell em if this sounds correct and if so can you tell...


Regrettably, this is a common problem. You're engine is what we call a "Head Breather" meaning that the crankcase pressure is vented from the heads. And, as per EPA regulations, this vented pressure is directed into the air cleaner to be run through the engine. As the air is coming out of the engine, it brings with it small droplets of oil. These droplets of oil are caught in the air filter and coalesce into larger drops. The drops are then blown out of the air filter cover by the air passing by it as a result of the bike going down the road.

You can reduce this by keeping your air filter housing cleaned regularily. Or, you purchase a kit that will reroute the vented air from the crankcase. The air is vented into the air filter housing through the two large diameter bolts to the front and rear of the air filter. These bolts are hollow.

Good Luck
Steve

Jan 21, 2011 | 2004 Harley Davidson FLSTF - FLSTFI Fat...

1 Answer

When engine is trying to start or running oil leaks out carburator area. doyou have video for step by step


If your engine has been sitting for a long period of time, your engine is probably "oil sumped". Since the oil tank is located higher on the frame than the engine, if the bike sits for a long period of time, oil will seep past the oil check ball and accumilate in the bottom end of the engine. I've seen the oil tank empty into the bottom end.

Now, the engine on your 93 model is what we call a case breather. The engine's crankcase breaker is located on the engine's cases down low. Later models are called "head breathers" in that the crankcase breathers are located in the rocker boxes, up high. So, even though the oil sumps on the later engine the oil doesn't go into the breather AS BADLY as the earlier models but it still gets in there.

Look on the back of the air breather assembly. There should be a pipe coming from the front of the engine on the timing gear cover on the right side of the engine going to the back of the air cleaner. Temporarily disconnect this pipe. Start the engine and allow it to run for a few minutes. Once the oil stops coming out of the pipe, reconnect it and disassemble the air cleaner. Clean the air cleaner. If the paper air filter is saturated, replace it. Reassemble the air cleaner assembly.

Now, Check the oil. Do not add oil to the engine as long as the oil is visible on the dipstick. Start the engine ride until the engine warms up. Now, with the engine warm, check the oil. The upper line is "Full Hot" while the lower line is "Full Cold". Set the oil level halfway between the lines. Do not overfill. If the bike is going to be sittting for a while, either drain the oil tank or start the engine about once a week and let it run for a few minutes. Do not allow it to overheat.

Good Luck.
Steve

Jun 20, 2010 | 1993 Harley Davidson FLSTF Fat boy

1 Answer

Oil in air cleaner


Run it minus an air filter until all the oil is off your piston head, you can also try keeping the plug out and ejecting the oil via that access by pulling the cord. It seems like you've already solved the problem, now you're just cleaning up.

Apr 21, 2010 | Briggs & Stratton Briggs Stratton Intek V...

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