How to Fix Oil Leaks: Crankcase Breather Edition
A customer writes, "My crankcase is puking oil. Help! I vented the crankcase breather down the back of the motor like you suggested and now I'm getting excessive oil coming from what I believe is the hose and higher RPMs -- to the point of it coating the swingarm and sidewall of my rear tire. Any ideas on where to start to get this corrected?"
Well, SH*T. That's not good!
Luckily, I've encountered this situation before... and out of the dozen or so times people have hit me up with this problem... every single time it's because someone over-filled their oil. You've gotta be really careful when you're filling your oil - there's different amounts for different processes.
TJ discusses this in detail in this video.
A few takeaways:
1. Make sure you're putting in the right amount of oil in your bike
2. Check your blow-by; it could be excessive (what's blow-by? watch this: • How Do I Know if My Ho... )
3. If that's not the problem it could be a motor issue
Watch and learn!!! Comment BELOW with questions!
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Пікірлер: 156
It is wet sumping . If it has sat for long periods without starting the oil seeps down from the oil tank past the checkball into the crankcase. Being a dry sump it is now sucking the oil from the crankcase and spewing it out the breather via the blow by hose.
@EvilTwin123
3 жыл бұрын
Went to look at 1989 Vulcan 750 today. Oil dripping out of hose by air filter Nike hasn't been ridden in 5 months. Backfiring too which they said was unusual. And it won't idle without choke on 20% How long before weeping oil issue stops?
@austincollins2421
Жыл бұрын
@@EvilTwin123 ever find out how to fix the issue ?
@duffmeister6480
11 ай бұрын
This happens to my 1972 FX occasionally usually only on initial start after a long sit, how do you fix it ?
@yagerjager
2 ай бұрын
@@EvilTwin123usually with frequent riding the oil stops doing that if you have a crank breather but if its going through the carb it’s something else, back fires is probably a carb blockage or tuning issue or even the valves are out of there specified clearance. The older the bike usually means more tuning more frequently
“Unless you have some serious issues with your motor” ... yes. Yes I do.
I measured my oil exactly with a graduated painters cup. Blew 1/2 a quart through the breather today. Kinked hose and high rpm.
@greengrind5089
3 жыл бұрын
The breather hose was kinked? Trying to figure out why mines leaking, same as you I’m certain I put the correct amount but still blowing some out after high rpm
Thought I blew up the engine so I'm glad I found this out. Not sure when I over filled it since it's been on filled for over 6 months but you know what I don't question magic
@gta7959
9 ай бұрын
Lmfao me to bro I got scared but how do I fix it ?
@TJBRUTALCUSTOMS
8 ай бұрын
drain it, and fill properly.
What do u do to resolve the problem - just drain the oil & fill w/ the correct amount? Bc I changed my oil again and while there is less leakage it still leaks. Thanks!
Interesting. Why would it happen to me 1.5 years after I changed the oil... Also it smells like gas.
@dougwaite2088
3 жыл бұрын
Fuel is getting past your piston rings or valves. Could be excess exhaust gas getting past the rings into the crank case and causing to much pressure
@callandunbar4927
2 жыл бұрын
turn the fuel off.
@deathtoll999
Жыл бұрын
@@TheHempHub this is crazy too read because I slowly started leaking oil from the jugs then the carb flooded while refueling at a gas station and also at the same time my petcock broke.. so now I know what my issues are for the most part..
@G.R.E.YMAFIAAFFILIATE7
3 ай бұрын
Same
@simonvintheriv6387
3 ай бұрын
Me 2
Literally just put oil in my bike and rode back from Napa and got oil all down my leg. I definitely over filled it after watching this lmaooo. Bike also starting bogging out at high rpm’s because of it as well. Hopefully once it reaches the normal level it’ll be fine 😂
Mine just last week out of NO-WHERE ... just started to pour out oil from the valve cover breather while sitting there reving the engine OR just getting into 1st gear and going forward. It literally pours it out.
Thank you bro I always thought it didn’t matter but this helped me a lot I was worried
Look up oil "sumping" if your oil level is okay and still have flow coming from the PCV.
No I did not over fill the oil. Started after a few seconds, POW the oil blew the oil fill cap off and oil all over the garage wall. So what is the problem? To me seems like the oil is getting back into the oil holding tank. Then pressure builds up and then POW, what can I do?
Super helpful, thanks. It’s exactly what happened on my bike.
My crankcase breather will completely drain my tank so it can't because it's overfilled any other suggestions of why it's doing this? Also the guy I bought it from didn't even have the lines hooked up to the oil filter he had them all rerouted is this why?
@hectorbautista602
3 жыл бұрын
Did you figure it out?!?! Im having the same issue just pumps out at idle
Super helpful and straight to the point! Thank you
I have a small 4 stroke engine and I think my problem started with a simple breather hose being kinked and pressure built up to the point that it blew the crank shaft gasket out as there is a bad leak even after fixing the hose that was blocking the pressure and I can not get the screws loose on the crank case! Hope I used all the right names for all parts specified and hope the problem is something easy to fix as it that!
I been having an issue with my main shaft seal leaking on my big inch motor even after just replacing it and putting some rtv silicone on the lip the stator bolts too. I don’t have any bad blow by in my breathers which I just run the open bolt with mesh screens from speed dealer on it. Any ideas on that? Iv replaced both main shaft seal and spacer and leaks first ride.
@TJBRUTALCUSTOMS
3 ай бұрын
Maybe the surface is scored and allowing oil past, maybe the shaft isn't perfectly round. Hard to say, can't really diagnose anything via comments, sorry man!
Hoping you can help me. I've got an R1150RS and oil is puking out of the filler...and no, I didnt over fill it with oil. Through a lot of searching, the only thing I can narrow it down to is a crankcase breather tube that might be blocked. I've looked in the air filter box and it looks all dry in there. I'm also burning oil sometimes at startups. I can't locate this breather tube... help me please, you're my only hope. Luke
If you get some junk holding your float needle open. The fuel can drain into the motor if the petcock is left open. Same result, puking fuel oil as pressure builds.
@TJBRUTALCUSTOMS
3 ай бұрын
🍻
My 07 kx250f is leaking oil like crazy from the breather.. i has the right amount of oil.. and idk what to do plz help
@TJBRUTALCUSTOMS
4 ай бұрын
Sorry I don't deal with whatever a kx250 is man. Get it to a mechanic!
I have a 2004 Bigdog ridgeback with a 117 ci S&S and I have oil in the air cleaner. One hose runs from the rear head to a one way check valve then to the back of the air cleaner . The other hose goes from the front head to a port on top of the carburetor. The oil is filled to the bottom of the fill neck as recommended by Bigdog. Is there another option I can use to stop the leak. Right now I have a Kuryakin 9931 catch can installed to the rear cylinder head. Any advice would be appreciated.
@TJBRUTALCUSTOMS
Ай бұрын
sory i have no clue man!
Will the oil look milky or frothy when seating out?
@TJBRUTALCUSTOMS
3 ай бұрын
what is "seating out"? if your oil is milky you likely have bigger issues, that indicates water is in the oil, your coolant system is leaking into the oil.
2022 Triumph Scrambler, 1200XC with an oil leak at the drive sprocket shaft. I noticed this leak in the showroom before I even bought the bike. Where are the pressure relief valves on this particular motorcycle? I’ve noticed oil seeping from the gasket on the bottom cover. It’s not much but just enough for me to notice a difference in color along the line where the gasket is. That’s excessive pressure because it doesn’t leak at idle. The drive sprocket shaft leaks after each ride, more so if I’ve been in the highway. The gasket seeping happens after a highway run. What could possibly be blocked or malfunctioning on a brand new motorcycle that would cause an oil leak because of access crank case pressure ?
@TJBRUTALCUSTOMS
7 ай бұрын
My dude that sounds like a mess. Im sorry but i dont know dick about fuck when it comes to triumphs.the last triumph i worked on was 8 years ago on a vintage T100. Get your scoot to a shop who can help, im sorry but i cant be if any assistance with this
Hello Oil coming from crankcase breather but only does it running not over filled runs great compression check 120 front jug 130 back no smoke nothing have no idea PLEASE help. Thank you very much Everything in oil pump clean and as it should be 30 pds oil pressure on start up.
What about the seal under crankcase hose? Can that cause oil to build up in hose?
First bike was an 883 with the 1200 kit, my dumb newbie self got a new air cleaner and oem bolts didn’t fit. Ran solid bolts in the head, about 3 miles down the road my oil tank exploded.
@TJBRUTALCUSTOMS
5 ай бұрын
Yep, that'll do it!! Lol
So what if it’s not overfilled? What if it’s just blow by? I have an 84 evo bottom breather. I need ideas on a catch can
@TJBRUTALCUSTOMS
5 ай бұрын
welp... the things that come to mind - Partially restricted oil return line. Wrong oil filter. Oil level too high in tank. improperly installed, upside down piston ring shitty bore job id look at that stuff before making a catch can honestly.
Love the smell of oil and sparks!
See I have a Yamaha 1982 maxima and my oil is going into my filter or airbox and when I started my pistons are sounding like they are scratching or scraping against the cylinder so I want to know how I can fix that or get it re-lined because I have a trip coming up soon and I need to make sure I’m safe on the road
So I have 2006 Sportster 1200, before I went to work I checked my oil while it was running and when I took the cover off it blew oil all over the place .. what would cause that ?
@TJBRUTALCUSTOMS
3 ай бұрын
its a sportster, I dont know man. sorry!
can i get some help? my bike wont go past 3k rpm.. its a 2015 dyna fxdb.. ive replaced injectors coil pack sprak plus leads, check stator checkd regulator checked fueling and there are no codes... im at a loss!
So what’s the correct way to fix. Having to much oil.
@TJBRUTALCUSTOMS
6 ай бұрын
Remove oil till there remains only the correct amount. Or, dont overfill, read the service manual 👍💪🏽💪🏽 🍻🍻
So assuming you can read a dipstick while the engine is hot. What if you’re not overfilling?
@TJBRUTALCUSTOMS
3 ай бұрын
Then there may be something else going on!
Thank god for this video I had oil shooting into my carburetor and I had no fucking clue what was going on and couldn’t find anything!
You mentioned motor issues. How come you didn't mention perhaps you should get a compression and leak down test to ensure you motors condition in regards to things like proper ring seal on the pistons etc..
@finecrazygunz
11 ай бұрын
Yea I noticed he didn’t mention the bigger more important parts. Probably just wants to make a quick upload vid to get paid and not waste much time. He just wants new content
@vicschierling9946
8 ай бұрын
Yup ,you tube mechanics and all their sheep
Excellent video, can you explain the air in causes higher pressure thereby puking oil..I have a 1965 Triumph 650 in a 71 frame..
Ha, having this exact issue based on his exact advice. And the "to much oil" is not an answer... The bike will run itself dry, overheat and the piston will seize up. I'm thinkin a catch can type system might let it run off somewhere and let it feed it back into the crank.
Look up sumping let my bike sit too long and it just blows oil out the air filter hard to start too get it stated and let it blow out till it stops
@TJBRUTALCUSTOMS
4 ай бұрын
Oill out the air filter. Oh ok.
I have a 2004 Yamaha R1 when I start the engine it starts to get excessive gas going into the crankcase. I have to drain my oil and it is heavily diluted with gasoline. I don't know what would be causing so much gas to get into my engine oil.pleasse helpe
@TJBRUTALCUSTOMS
8 ай бұрын
i have zero knowledge about R1's
overfilled my oil. crank case is leaking. Do i need to replace the crank case cover or should i just bleed all old oil out and replace the filter? will it still leak ? (need help)
I just eliminated the pair valve/Desmog setup on my 2004 VTX 1300 and was wondering if you know if that would plug or block the crank case breather. The kit that I installed said nothing about it but I want to make sure it’s not a problem.
Mine leaves the 3 ft. Puddle and is not overfilled. It will puke the oil until it's dry as a bone. That's the first thing someone's going to check. I need diagnostic help. Someone from another platform said cracked piston in between the rings. Starting to think this might be it.
@shannamassie7104
3 жыл бұрын
Hi. I am having the same issue. Did you solve the problem , if so, what was the problem and what was the solution? Thanks
@bigguy8586
3 жыл бұрын
@@shannamassie7104 it was a cracked piston. It ran pretty good, that's why I couldn't figure it out. It wasn't until I actually pulled the piston out of the jug that the piston fell apart in between the oil rings. It got crazy hot probably from running lean. Even though the machine wasn't running hot, the piston must have been. It practically melted and crumbled at that joint. I got lucky and listened to another poster who had the same problem. It wasn't burning the oil and ran good so I didn't suspect the piston. Sorry for the bad news bit your piston is likely hosed. I tried the pcv mod but nothing worked.
@shannamassie7104
3 жыл бұрын
@@bigguy8586 Thank you so much for your response I really appreciate it 💓💓💕
i opened up the drain plug but no oil cam out.. so i put more oil, and that was a problem.. i still hear a scratching sound from piston, which i would assume no oil to lubricate, my best guess? somethings clogging the oil, seems like alot of compression, I could be wrong, which i always am :\ .. i'm gonna open the plug again see what happens
I have this problem. The crankcase ventilation is puking out oil. The difference here is that it will puke out oil until it gets low on oil. LIke it wants to puke it all out. It only does this under high rpm under a load situation (revving the motor in the driveway doesn't do it) it won't leak unless high rpm AND high load. Then it spits it all out until its low. Does anyone know what could cause this. Initially, I did overfill it and went on a long road trip. The bike had a history of going through oil (KLR650) so thats why i usually kept it full or a little overfull so that it wouldn't get low as fast. Now, it dumps what looks like a quart out in a matter of seconds once it has the condition met listed above. UPDATE: This ended up being a crack in the piston in between the rings. It was undetectable until I pulled the jug. I couldn't see the damage until the piston came out of the jug.
@drewsXR650L
2 жыл бұрын
Interesting, was the bike making any blue smoke? Or was the compression just getting shoved into the crank? Unsure how all that works, I would assume if compression air is getting into the crank you would also get oil into the cylinder?
Awesome video I have a 00 Yz400f dirtbike and same problem bike runs great no engine trouble at all and the oil isn’t over full put the exact amount it called for and still is doing it not pooring out but definitely more than should lost for words I guess lol
So do you just have to wait for all the oil to come out ? And after clean it up because mines doing the same thing and idk if I just had to wait for it to stop that
@fredbarnich8145
3 жыл бұрын
I have the same problem with my Kawasaki 1500 Vulcan nomad, oil was coming out from the right side, I when to the dealer got a oil change and the put the right amount and all good now,
So if I over fill it will it dump a lot most of the oil out
@TJBRUTALCUSTOMS
2 ай бұрын
Not necessarily. Why would you overfill????
i thought it could be from blow by but my motor has plenty of compression i plugged iy then when i took of the plug it was like a air compressor it just shot out heaps of compressed air whatever you do do not plug the crankcase vent
Ya TJ I have this problem with a 86 soft tail custom .oil puke out the vent hose on shut down . Bike runs fine other wise any ideas? Other than over filled Tks from Canada .
@jefftherrien8435
4 жыл бұрын
Kerry Munson Tks Kerry . It is a custom copper and I pick it up Used . I appreciate your insight. All drop you a line when I get into it lol . Tks again every thing you said makes Sense . I’ve asked more then one I so called bike Mac. And not
@sweeny7267
Жыл бұрын
@@jefftherrien8435 What was causing it, and what was the solution. I have oil puking out of vent when turning the engine over trying to start...
Hi, TJ just wondering what oil you recommend for my vt 600 92, or would just stick with the manufacturer's specifications cheers Chris.
@ChrisHigginshigsthebiker
5 жыл бұрын
Thanks bud.
I think i overfilled. My cam chain tentioner oil plug keeps blowing out
I have a 92 FXSTC & I had tires done at HD.. well they topped off my oil and Iv had it piss out of every spot possible. Sucked some out with a Turkey baster & it has seemed to solve my problems… for now. Ride safe everyone. Read those manuals.
Oil is coming out when I rev to high rpms what's that about
@TJBRUTALCUSTOMS
8 ай бұрын
you have ghosts.
why will it not stop, it will keep going till empty it seems, it already below normal level also this is a shovelhead
@TJBRUTALCUSTOMS
3 ай бұрын
sorry man im not sure about shovelheads they have a different oiling system than a honda!
Jetta mk2 crankcase breather smoke comes out of it. How can I fix this
I have a 2009 Harley 883 it keeps blowing the dip stick out it has three quarts in it
How about oil and smoke from the breather?
@joshsutcliffe6099
2 жыл бұрын
@@TJBRUTALCUSTOMS well what kind of issues. Rings going?
Maybe head gasket? Maybe piston rings? Why not mention that and get more into detail?
@TJBRUTALCUSTOMS
8 ай бұрын
because both of those things are EXTREMELY rare with these bikes. this is about the crankcase breather. not the cylinders or gaskets 😉
Or if it sits a long time an the seat on pump needs deglazed and new check ball and spring!!
@sweeny7267
Жыл бұрын
Could this be the reason of my purchased FXSTS,after sitting for 9 years, blowing out oil of oil vent(?) when trying to start, from a tube from the lower Evoblock, left side next to the oilpump? How to deglaze pumpseat?? Thanks. (Sorry, am new to HD, is my first)
I have what it think is gas coming out of the Bowl drain i believe its called, why would that be happening or how can I fix it? Would really appreciate the help.
@vernon8337
3 жыл бұрын
bad or really dirty float needle valve,,, staying open , over filling the float bowl !
Unless were talking shovel heads and older then it probly leaks past your check ball in your oil pump. If you leave it sitting threw winter without starting it you'll have a puddle.
@duffmeister6480
11 ай бұрын
@@TJBRUTALCUSTOMS. How does this get fixed ? Thanks.
Crankcase vent leaking for me but not my engine oil- that’s darker than what’s coming out pretty sure it’s my primary’s. But been a year since I did my change and it was leaky out of my derby cover anyways so by now it’s low no reason for it to push out oil. Hit a deer two weeks ago didn’t drop the bike but he went up the right side of my bike- 03 sporty 883 anything you could think of? Possibly building too much crank pressure from the switch at the filter?
@iammonty99
2 жыл бұрын
@@TJBRUTALCUSTOMS not a bother buddy thanks for your time anyways keep on keeping on
😂 YEP! Probably Overfilled The Shit Out Of It .. 🤦🏾♂️🙏🏾🫡
@TJBRUTALCUSTOMS
3 ай бұрын
oof!
What do drine the oil out of the bike
@TJBRUTALCUSTOMS
3 ай бұрын
huh? dont drink the oil dude
Thannks for that recon thats it 👍🏻😎
@TJBRUTALCUSTOMS
9 ай бұрын
👌
Hey TJ got a question will a exhaust system from a 1998 shadow ACE 1100 will it fit a 2007 shadow Sabre 1100 ?
@codenamenoob4973
4 жыл бұрын
Seems like a very specific question
I overfilled my 08 Electraglide with engine oil. On a long ride it was leaking oil it looks like out of the air filter. Is this bad it stops when I turn off the bike well what should I do?
@DaveLester02
4 жыл бұрын
Sell it
Fake music blast have to turn it down then have to turn it up to hear voice. Thanks youngster
@TJBRUTALCUSTOMS
Ай бұрын
youre welcome! thanks for watching! I'm not michael bay and i dont have an audio engineer. But if you want to donate maybe i can afford one to protect your hearing👍🍻👍
What is its not over filled
Overfilled my 97 vulcan 1500,started leaking oil from under the top of the front cylinder under the chrome covers,it didnt come out of the breather so did it just blow a gasket or some sort of seal? I drained it to the proper amount and still oil leaking fast out of the same spot,thanks for any advise you can give me,dont want to do a 10hour top gasket if I can help it,cheers
@brodienelson7493
3 жыл бұрын
I believe I have same issue
This video doesn't help me at all I have white smoke coming out of my breather valve from the top of the motor all I did was an oil change help
Oh 1989 1340 evo from question below
Great information
I did not overfill mine but always spew a little oil everytime
@TJBRUTALCUSTOMS
4 ай бұрын
There's a problem somewhere.
@ArthVader09
3 ай бұрын
@@TJBRUTALCUSTOMS is it suppose to have a plug at the end of the breather hose?i saw many with a plug but i saw a video saying it should not be plugged because it will build up pressure. Which one is true
Would this still be the case if the crank case breather started leaking after lowsiding the bike? I slipped with the bike on a turn when it was snowing and saw no external damage to the hose or rest of the bike.
@bradleyerickson3427
3 жыл бұрын
But I was having problems with loss of power before this happened the bike is 2001 with all original parts and had sat before I bought it so maybe the crankcase breather went bad?
@bradleyerickson3427
3 жыл бұрын
@@TJBRUTALCUSTOMS I get it's all theory withought the bike present I guess my follow up question is do you think the head gasket or piston rings could be a more likely contributor to the leak?
@bradleyerickson3427
3 жыл бұрын
@@TJBRUTALCUSTOMS ok. I'm not smoking so I'm glad its nothing in the engine. I guess I'll just wipe down all the mating surfaces and try to blow the oil out of the hose and hopefully that can help narrow it down. Thank you!
I just had this problem 😕 last night on my 2007 yamaha 1300 🥲
I'm wanting to change the oil on my 2002 Honda Shadow Sabre 1100... How much oil do you recommend ? I don't want to have a crank case problem
@jefffrayer8238
5 жыл бұрын
You need the owners manual. My 2006, 1100 Spirit is 3 qt., 8 oz. with oil and filter change. Yours should be the same. After starting bike back up a couple minutes check the oil. Oil is checked holding it up right without threading dipstick in, NOT leaning on kickstand. It should be a little below the full mark. Don't lose the o - ring on the dipstick.
@devlonmoore7578
5 жыл бұрын
@@TJBRUTALCUSTOMS yeah I do need a owners manual. It's my first Bike and I bought it off a guy used and didn't come with an owners manual.
@devlonmoore7578
5 жыл бұрын
@@jefffrayer8238 thank you for the advice this being my first Bike I bought it used and didn't come with a manual.
@jefffrayer8238
5 жыл бұрын
@@devlonmoore7578 It really sucks when you don't get the owners manual when you buy something. I was fortunate and did get it with the low mileage Honda. Lot's of good info. Many times you can find an owners or service manual for most anything on line. I bought Service Manuals for both of my Harley's from the dealer. I asked the Honda dealer for this bike and Honda doesn't offer one. That is why I'm sooo thankful for people like TJBRUTALCUSTOMS that take time to show us how to fix bikes ourselves. I used his video to learn how to change the coolant. It's an excellent bike for sure and I hope you enjoy yours too. Good Luck, Jeff
Helps thanks 👍
@TJBRUTALCUSTOMS
9 ай бұрын
No problem 👍
How do I contact you
If that's all it is , I will be a happy man
What about gas?
What about a bad check valve
@pete092559
2 жыл бұрын
@@TJBRUTALCUSTOMS I have a 91 fat boy if I let it sit over a month without starting it it will blow oil out the breather on the bottom. If I start it regularly after it’s fine
@sweeny7267
Жыл бұрын
@@TJBRUTALCUSTOMS Are you refering to the check valve ball in the oilpump? I have same pronlem with a recent bought '89 FXSTS.
Just add two hand full of sawdust and the whole thing goes away
@TJBRUTALCUSTOMS
4 ай бұрын
My god! thank you! Youre so right! Does this also work for mosquitos and receeding hairline??
@TJBRUTALCUSTOMS
4 ай бұрын
Thanks for the hot tip!
thank you i think your right i hope i have 1987 heairitage flst iam learning some say check hot some check not then theres the purge then this guy puts oil in the filter this guy dont . i cant find a service book for just my bike. well thanks later.
That's true. To much oil.
😂😂 definitely added to much oil then
thanks for this i recently topped up my oil i did think why the fuck did i do that theres already plenty of oil in there buy ill drain some should help
When your bike has cancer:
Ok cool beans I appreciate it drained some oil, still wondering if that means I don't have to replace the gasket? Is there a compromised gasket somewhere now I should be aware of? Lol