How Much Oil

Reply Subscribe

Thread Tools

Search this Thread

Apr 4, 2014 | 06:56 AM

#21

Wild Card

Road Warrior

Joined: Apr 2011

Posts: 1,443

Likes: 9

From: North Carolina

Quote:

Originally Posted by foxtrapper

I don't dispute it, but I sure don't understand it. My breathers are from my engines cylinder heads, not the oil tank (though there might be one there also). Why would having the oil tank full cause oil to breath out of my cylinder heads?

If they don't vent the top end it could build pressure. All motors are vented in the top end auto industry its called a PCV valve.

Apr 4, 2014 | 07:40 AM

#22

foxtrapper

HDF Community Team

Joined: Nov 2012

Posts: 6,191

Likes: 2,419

From: USA

Quote:

Originally Posted by Wild Card

If they don't vent the top end it could build pressure. All motors are vented in the top end auto industry its called a PCV valve.

I understand crankcase ventilation quite well. What I don't understand is why filling an oil tank connected remotely to the engine causes oil to drip from those cylinder head vent tubes.

Apr 4, 2014 | 07:50 AM

#23

hardheaded

Seasoned HDF Member

Joined: Oct 2012

Posts: 11,226

Likes: 3,049

From: St.Louis Mo.

i put 3 quarts 14 ozs. in my 12 streetglide and it brings the level right to the full mark when hot. never had any blow by or problems doing this.

Apr 4, 2014 | 07:54 AM

#24

teedubya

Road Master

Joined: Sep 2009

Posts: 892

Likes: 11

From: Northern NY

HD service manual will say to fill with 3qts, start and idle to check for leaks and fill oil filter. Turn engine off check oil level and fill to midway mark. I have no idea why some HD shops continue to fill to full mark. Pisses me off to no end when I find it done in this manner.

Apr 4, 2014 | 07:57 AM

#25

continentaldrifter

Tourer

Joined: May 2007

Posts: 408

Likes: 5

From:

WOW............this is a surprise to me as i have been putting 4 quarts in since the Evo's.....never once had ANY blowby....

Apr 4, 2014 | 08:02 AM

#26

TWIN CAM 96

Outstanding HDF Member

Joined: Apr 2011

Posts: 2,555

Likes: 6

From: East of the USS Midway

Quote:

Originally Posted by the warden

Always fill it to the halfway mark on the dipstick, which generally turns out to be about 3.5 qts. That said, I use the Scavenger System, so once the oil starts running clear I then continue to fill until half way between add and full. Never get oil blow by.

+1 on this 4.0 qts. & 3/4 on the stick

Apr 4, 2014 | 08:06 AM

#27

TheGrandPoohBah

Extreme HDF Member

Joined: Jun 2011

Posts: 14,731

Likes: 2,536

From: Mountain Top, Alabama

If you plan to fill the oil filter first then install it on the bike without a mess, you will need a couple of "Bruno's" to hold your bike up in the air sideways!
I always fill the oil filters on vehicles that have the oil filters mounted vertical.
Horizontal mounts, like on our Harleys, will pose a challenge to not spill, Bro!
"Thumb it" and let us know how it works out for ya!