Author Topic: Breather dripping oil when running  (Read 247 times)

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malzstx

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Breather dripping oil when running
« on: 17 August, 2017, 17:24:45 »
Can anyone tell me why I am getting drips of oil from the breather when the engine is running on my Super Rocket?.....thanks.

JulianS

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Re: Breather dripping oil when running
« Reply #1 on: 17 August, 2017, 18:05:53 »
If it is a lot then could be any of these;

Breather not properly assembled - wrong thickness cork.

Excess crankcase pressure caused by worn rings/bore/guides, rings not bedded in, poor scavenging of oil from sump.

But expect a little after a good hard run.

If bike wet sumps then it will blow oil until excess cleared.


EDDIE SIMPSON

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Re: Breather dripping oil when running
« Reply #2 on: 17 August, 2017, 22:01:02 »
i would also add a loose oil pump or blockage in the return flow or p r valve not seating to that list, too much oil in the sump. but the favorite is a worn out cork breather gasket.
what does the oil return in the oil tank look like when the engine expels oil from the breather?

malzstx

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Re: Breather dripping oil when running
« Reply #3 on: 19 August, 2017, 17:51:05 »
Thanks so much for the reply......the return is flowing excellent back to the tank and the engine has been re-built professionally. Giving it some thought, it may be the residual oil in the engine dropping into the sump when the engine has stopped ???

malzstx

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Re: Breather dripping oil when running
« Reply #4 on: 19 August, 2017, 17:54:37 »
Furthermore I have since fitted a 'Ballafix' quarter turn tap on the flow to prevent wet sumping when standing and I'll see how that goes. Many thanks to you Julian & Eddie guys.