Crankcase vent is blocked.

I still believe the vent being blocked is the only problem this engine has. Here are two examples of vents that are not blocked and a vent that is blocked. I guess we will find out soon.

[@andreasandriopoulos9330]

A good Technical video. Every thing was well explained for a normal person to understand.

[@hi-techredneck7069]

Very informative Fan. Thanks for sharing!

[@apps171]

Very useful information.

[@LumocolorARTnr1319]

Did you see what caused the blockage? On a china gy6 engine I saw a big long piece of gasket that was not cut away in the factory reaching over an open space, wall to wall in the crankcase below the crankshaft. If I remember correctly it was about 5-7 cm long and 1.5 cm high gasket, I can see how that eventually breaks off and falls into the oil. It is apparently common they don't do the assembly properly at factory and skip on cutting those away.

[@alexbenjamin6178]

Thank you very much,

[@discobobentertainmentmore]

That's interesting to know that.

[@SHADOW-bg4mm]

Interesting... I'll try this too, I do believe my crankcase breather is being blocked

[@dinosaursr]

Thanks buddy.

[@mrjaybennett80]

I knew for sure he was going to pass out trying to blow air into the Tao Tao engone lol.

[@JAMTOAM]

have u tried use air hose with not so high pressure

[@juniorarnold3704]

I'd say you are correct.

[@Freebu]

Sorry for digging up old content but did you find an air filter for the crank case to connect it there in a store or jsut drilled it and pluged a connector?

[@fan1701]

The store we purchased the motorcycle from replaced the engine and we reconnected the vent hose back to the air filter. The new engine has had no problems since. This vent can have a hose that attached that hangs down behind the engine without a vent and it will be fine. There are small air that can be attached to the end of the hose. Just do a search for a filter that has a inlet diameter the same as the hose size. Thanks for watching and commenting.

[@Freebu]

@@fan1701 Thanks for a quick reply. Struggling with the decision if I should replace my airbox with a pod filter. But migth have issues getting my MOT if I let the crank hose hangling loose so liked the idea where you had it connected to the pod filter.

[@N269]

Possible the breather is cam driven???? I very much doubt it, or even solenoid activated? Or perhaps they just gone messed up? (Me thinks the latter) Good thing you found it early! Nice spot indeed.

[@rikityrik]

This must have been one of those how to for idiots tutorials because I think I actually got it! Lol jk, was well explained, good video!👍

[@lomsomesGarage]

I wonder if the hole didn't completely drilled through and I just broke enough to allow it to push through under high pressure

[@fan1701]

Yeah, that is kinda what I was thinking.

[@JAMTOAM]

do u need a filter for crankcase

[@wcjcnc]

I thought crankcase breathers are suppose to be a one way check valve that only let pressure OUT of the crankcase. So they’re really open in both directions?

[@bertoldriesenteil1430]

There is a valve that only lets air out once it has reached a certain level within the hose on my Suzuki GN125. So blowing air in is no problem. Sucking air out would be more difficult but I wouldn't try it for obvious reasons.

[@jeffflowers729]

Me too. I have a 21hp B&S blowing oil from the dipstick and burning out the exhaust. I can suck air easily but not blow into it. Sucking air would be the correct direction into the carb. So now I'm stumped again.

[@jeffflowers729]

I have a 21hp B&S blowing oil from the dipstick and burning out the exhaust. I can suck air easily but not blow into it. Sucking air would be the correct direction into the carb. So now I'm stumped again.

[@Ali-uf1sq]

i have the same problem, but its minor and i suspect the piston rings, what did you do with your bike?

[@jeffflowers729]

@@Ali-uf1sq I was actually researching for a similar issue with my lawn tractor lol. Was the head gasket for me.

[@snofy972]

What's the effect of this problem to the engine?

[@fan1701]

If this vent is blocked it will cause engine oil to leak and will blow out the seals at the kickstart, behind the flywheel. Thanks for watching.

[@josiahcorrea6183]

This might be a dumb question but i cut one of my lines conected to the breather systems and i did it too short, where do i get the same kind of line i have no clue i just bought my apollo 125

[@fan1701]

Most auto parts stores should have hose that small. You could get some off an old junk vehicle from the windshield washer hose. A hardware store would probablt have a union that would let you just stick the hoses back together where you cut them.

[@fan1701]

Make sure you tighten all the bolts and nuts on your Apollo. Chinese motorcycles and atvs tend to need the bolts tightened all over them. Keep that chain oiled before each ride to make it last longer and not stretch as much.

[@josiahcorrea6183]

@@fan1701 thank you so much i appriciate you i wasnt even sure if i was asking the right question thank good ness some one got back to me ive been not know if its like a special hose or somthing by the factory. And i will make sure of that now thanks for the extra information as well frfr. Im off to the auto shops, hope you have a good day!!!💯💯💯🤙✌

[@josiahcorrea6183]

@@fan1701 i got everything done an its better then before omg i should honestly replace all the hoses and lines cause of how nice it is.

[@aarondavenport3143]

Do u have a video showing how to unclog the crankcase breather?

[@justinshannon-wangler6229]

140cc (dbx1) having the same dang issue need help! What's the options??

[@fan1701]

I wound up with a replacement engine from the dealer. You should contact the dealer you bought from ASAP. There is a form you'll need to fill out that should be on their website. Since replacing the engine we have had no major issues with it. I had to ship my defective engine back to the dealer so I'd imagine you will as well. I had to go around and around to get my engine replaced so be persistent with them. If you keep riding the bike with it building pressure you will wind up blowing out an oil seal so keep that in mind.

[@mouaxiong1620]

I’m late on this brother but will this work on cars also?

[@fan1701]

Cars also have engine vents but they usually are connected to a valve on the intake. These can get stopped up too but most of the time they don't. Thanks for watching and commenting.

[@4057hofft]

So did you blow compressed air

[@fan1701]

Yes, this video was just to demonstrate what the vent should do.

[@chancesmall7026]

Think you’d be able to clear it out with carb or brake cleaner?

[@fan1701]

I tried everything but a drill bit to clear it. The place where I bought it from eventually sent me a new engine.

[@chancesmall7026]

@@fan1701 make sure you slap a filter on it so it doesn’t happen again. I run a 3/16 fuel line with a cars inline fuel filter so it has good breathing and filtering

[@rabbippfx]

what is the solution? How to repair it ?

[@fan1701]

The dealer replaced the engine. I would have found a way to clear the blockage or drilled a vent in the top valve cap then thread a fitting for a vent hose there. Bike has been great since the engine swap. Thanks for watching and commenting.

[@khmerghost]

What will happen if that thing is clogged?

[@fan1701]

Pressure builds up in the crankcase and it will blow out your seals.

[@vixsy5911]

What problems does this cause

[@fan1701]

It causes a build up of pressure inside the crankcase that will cause the oil to be forced out through anywhere it can such as the fill tube and can push out the oil seals.

[@steviemurdoch3213]

And the point was?

[@fan1701]

The point was that the engine vent on the china engine from the db14 was blocked and should have been free to vent. This was causing it to pressurize and leak oil everywhere. I was sent a replacement that worked perfectly and wasn't blocked. Thanks for watching and commenting.

[@fan1701]

They are good beginner bikes IF you are somewhat mechanically inclined. We have had great luck with it and I would buy another one. Japanese bikes do tend to be built stronger.

[@brianmott728]

I own a Honda walk behind lawnmower with an OHV engine that oil comes out of the breather tube and collects in the air filter holder. The oil from there drips down on to the mower deck. How do I troubleshoot and fix this problem?

[@deonleak8067]

I have the same problem just found out don't know what to do lol

[@brianmott728]

@@deonleak8067 I was told by someone else on here that the valve behind the vent tube is not doing its job. They said to remove the flywheel to get to that area by prying gently on the flywheel after loosing the flywheel nut and hitting the top of the crankshaft with a rubber hammer.

[@FordF4NN]

Could be blow by from Piston rings. Try a heavier weight oil to see if it slows. Lucas makes a good oil conditioner

[@FrankieCA99]

​@@FordF4NN I have the same problem but bike is not smoking and have really nice power, and it's pushing oil from the breather