[CrazyPoncho!@#$]

I was just think'n, could it be the Trans/Engine Breather? If some how pressure is building up an out thru those....

 

[psychodiablo]

I was just think'n, could it be the Trans/Engine Breather? If some how pressure is building up an out thru those....

crank case breather was first thing i checked. in the past it had came off the nipple under the tank.

 

[vindex1963]

i could fuk up a steel bowling ball in a sand box.

Hahahahahaha never heard that before.

 

[depot picker]

Sure sounds like a breather tube problem.

 

[Motorbikerx]

Maybe you've overfilled the oil and it's blow-by dripping down the rear cylinder.

Yeah what Vin said, I had same leak thought same as you.
But it was blowby running down in between the cylinders then hitting the ledge at the top of the barrel and running along and dripping off the back.
Had me fooled too for a while.
Don't go pulling anything down just clean the oil and don't add as much when you change it.

 

[psychodiablo]

Sure sounds like a breather tube problem.

as i told others that was the first thing i checked and thats not it.

 

[psychodiablo]

Yeah what Vin said, I had same leak thought same as you.
But it was blowby running down in between the cylinders then hitting the ledge at the top of the barrel and running along and dripping off the back.
Had me fooled too for a while.
Don't go pulling anything down just clean the oil and don't add as much when you change it.

i might try to replace entire tube.

 

[visionjohnny]

i might try to replace entire tube.

zip tie your tube you have now to nipple

 

[kpvero06]

Hi Psychodiablo, I know its almost 4 years ago but what ever happened with your oil leaking from rear head gasket ? I have the same thing. I even put cardboard strips in the fin to make sure that is where it was coming from. Its just spitting oil.

 

[Motorbikerx]

Sure it's not from the breather, mine mists out the breather and if oils on the full level will drop down and run back a long that fin and then drop down and land on crankcase and look like a primary seal leak 😂
Oil travels and is affected by gravity.
Just ask a Panhead owner .
The full line in a Vic I ambiguous too a whole thread could and is done on that fact.
Better to the low side than full as Vics don't really use oil.

 

[kpvero06]

No I put some strips of cardboard in the fin at the head gasket and that was where it was coming from. I have now pulled the engine and replaced both front and rear cylinder head and base gaskets and put engine back in frame. It is a Major Job! I will finish install this weekend and go for start up with all my fingers crossed and praying that the oil leak was just the head gasket !

 

[kpvero06]

Resurfaced head and cylinder to flat mated within .001. New gasket and Still drips 1-2oz oil when I stop and turn it off. Got to be bad seal on narrow outer part of gasket, head and cylinder where the oval oil hole runs down from the valve area in the head. No question it is leaking from the gasket area . Any comments besides take it apart and try try again ?

 

[Motorbikerx]

Where does your crankcase breather dump to?
For sake of analysis extend the hose away from the engine.
Thoroughly degrease the engine.
Wash it off then dry it thoroughly, finish with air blower.
Get some talcum powder in a stocking and dust the engine completely .
That done, start the engine and begin checking....the oil leak will show itself as the talcum picks up the oil.
It's an old trick.

 

[weirjweir]

Thank you motorbiker X for your reply. It's really the front cylinder and it is definitely leaking from right under the exhaust at the gasket. I like your talcum powder trick like a fat girl on the wet spot. LOL. I'm at the point now since I've had this motor apart two times now trying to fix this and have done everything even take it to my local Harley guy and sand down The Jug and head check for tolerances and make sure the dowel pins are proper and a new gasket I'm either going to stuff some black RTV or JB Weld putty in there since no gases are escaping just oil after I shut it off has to be the top lip on the outside of the gasket at the oil runs down on from the head and then comes out

 

[weirjweir]

Funny how my user name changed

 

[normthenomad]

Thank you motorbiker X for your reply. It's really the front cylinder and it is definitely leaking from right under the exhaust at the gasket. I like your talcum powder trick like a fat girl on the wet spot. LOL. I'm at the point now since I've had this motor apart two times now trying to fix this and have done everything even take it to my local Harley guy and sand down The Jug and head check for tolerances and make sure the dowel pins are proper and a new gasket I'm either going to stuff some black RTV or JB Weld putty in there since no gases are escaping just oil after I shut it off has to be the top lip on the outside of the gasket at the oil runs down on from the head and then comes out

DO NOT sand anything.
DO NOT use JB or RTV.
Either leave it alone or do it right.

 

[weirjweir]

I hear you Norm, so how do you resurface the head and cylinider if not using machinist block and 220 to 340 grit ? We had a great fit both times and tested with feeler gauge all around mating surfaces before install without gasket in place. Gasket placed properly and perfect torque .That thick double gasket should easily have worked. Studs streched ?? Gasket is not doing job under exhaust in that thin line by the oil hole. Thin rolled strip of JB steel puddy still not off the board to fill that gasket line.

 

[Motorbikerx]

Do whatever you like cos you will anyway.

 

[kpvero06]

True enough, It is a cheap bike $1500USD with 16k miles I picked up at Auction and had this leaking issue. I've tried twice to fix it the right way with no success, so pissed. I will experiment for $7 and if unsuccessful I will take it all apart for the third time and back to the machine shop new gasket and maybe studs. Try Try again.