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About oil return

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JON

Posts: 98

Joined: Thu Feb 12, 2004 1:01 am

Location: Helsinki, Finland

Post Sat May 19, 2012 3:10 pm

About oil return

Hi guys,

Just got Mine to roll again, with new cyls, etc.
I added oil filter into return line (from a Panhead) some time ago. So now when I started "new" engine I could see how oil circulates. I wondered that last season also (now new cyls).
From return line oil comes at idle as pulses. Do not want to throttle much more now, when new things in. Seems like oil amount has to raise to some level in cranck-case and then it spits it out. As a "batch". Should it be constant flow or what?

JON
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Hopper

Posts: 35

Joined: Wed Jan 20, 2010 9:52 pm

Post Sun May 20, 2012 5:43 am

Re: About oil return

Intermittent spurts are normal.
Return pump is higher capacity than the supply pump, in order to stop oil build up in the crankcases, so it sucks air as well as oil back to the tank as level in cases rises and falls that little bit.
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JON

Posts: 98

Joined: Thu Feb 12, 2004 1:01 am

Location: Helsinki, Finland

Post Sun May 20, 2012 8:34 am

Re: About oil return

Thanks for info!

JON
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ohio-rider

Posts: 234

Joined: Tue Jun 12, 2007 7:26 am

Location: Ohio

Post Mon May 21, 2012 5:04 am

Re: About oil return

Jon, Remember that idling a fresh engine for long periods of time should be avoided.
Steve
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JON

Posts: 98

Joined: Thu Feb 12, 2004 1:01 am

Location: Helsinki, Finland

Post Mon May 21, 2012 1:05 pm

Re: About oil return

Yep, I know.
JON
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Keith

Posts: 186

Joined: Sat Jun 28, 2008 10:25 pm

Post Wed May 23, 2012 5:25 am

Re: About oil return

Doh What's wrong with idling a fresh engine for long periods, other than cylinder cooling.
Keith
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Frankenstein

User avatar

Posts: 1561

Joined: Thu Jun 27, 2002 12:01 am

Location: Interlaken, NY USA

Post Sat May 26, 2012 8:07 pm

Re: About oil return

About one quart every twelve minutes @ 2000 rpm's is normal oil flow for the flathead pump.
DL

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