Oil puking

Energy One
Tattoo

Tattoo

New Member
I have a 2001 107 mastiff tore down over winter and painted tins and changed oil. Now when I ride it's puking oil out breathers when it gets hot. It's not over full. And when oil gets back to tank it's all foamy
 
Alexey

Alexey

Active Member
Check the compression ratio in the engine is hot. If the oil breaks out of breathers, most likely from the combustion chamber into the crankcase gases pass. Breathing gear can not separate oil mist from the crankcase gases from the pressure in the crankcase. Oil takes off from air vents. Replacement of the piston rings. Perhaps the repair top end.
 
Marky-Marc

Marky-Marc

Well-Known Member
Alexey said:
Check the compression ratio in the engine is hot. If the oil breaks out of breathers, most likely from the combustion chamber into the crankcase gases pass. Breathing gear can not separate oil mist from the crankcase gases from the pressure in the crankcase. Oil takes off from air vents. Replacement of the piston rings. Perhaps the repair top end.
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:agree:

Your rings are either broken, put in incorrectly, etc......or head gasket breach......but most likely it's the rings....rings are letting oil into the crankcase and it then vents the oil out the breather tubes.
 
Marky-Marc

Marky-Marc

Well-Known Member
Tattoo said:
I have a 2001 107 mastiff tore down over winter and painted tins and changed oil. Now when I ride it's puking oil out breathers when it gets hot. It's not over full. And when oil gets back to tank it's all foamy
Click to expand...
On that note, did you put NEW RINGS IN? Did you remove Pistons or just the jugs? Did you put new gaskets in? Head gaskets and cylinder gaskets?
 
Alexey

Alexey

Active Member
Stop. Maybe another reason. For some reason, the oil accumulates in the crankcase. Check the return line. Damage, wrinkles, oily tube contamination, oil filter. But most likely rings :(
 
P

pauly

Active Member
Oil can accumulate in the crankcase over winter! Just ride the bike! As soon as the motor gets rid of excess
oil in the dry sump it will stop puking out.
Or drain the sump through the sump plug.

Paul.
 
Tattoo

Tattoo

New Member
Marky-Marc said:
On that note, did you put NEW RINGS IN? Did you remove Pistons or just the jugs? Did you put new gaskets in? Head gaskets and cylinder gaskets?
Click to expand...
No motor work. Just oil and filter change. I was reading maybe oil filter is the problem it's for twin cam maybe and I need older style for Evo ?
Alexey said:
Stop. Maybe another reason. For some reason, the oil accumulates in the crankcase. Check the return line. Damage, wrinkles, oily tube contamination, oil filter. But most likely rings :(
Click to expand...
Oil change only could it be wrong filter ?
 
Tattoo

Tattoo

New Member
As soon as motor is hot it pukes out tons. I'm gonna change again and put k$p lifetime high flow filter on this week and check lines. I marked all the lines and was sure they were right. Any diagrams for lines?
 
Marky-Marc

Marky-Marc

Well-Known Member
You said it was tore down.....to me that means disassembled......if it's a lot of oil coming out, I'd still say it was rings....but if engine was NOT disassembled at all and you painted tins on bike, a twin cam oil filter will do that....
 
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Marky-Marc

Marky-Marc

Well-Known Member
oil filter should be like a 170 or 170c K&N, but yes, if your motor was NOT disassembled at all, wrong oil filter could cause some issues.....
 
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fuelman97

fuelman97

Member
I put a twin cam filter on my sporty years ago same problem. Twin cams have higher oil pressure and denser media in the filter, than an evo style engine.it may cause oil to back up in the base I would just get a evo filter from the HD dealer.
 
fuelman97

fuelman97

Member
Kn-170 is for an evo. Kn-171 is for a twin cam K&n doesn't have big dog on there search. 1998 HD ultra is an evo , 2006 is a twin cam .
 
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