Intermittent oil on manifold
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Cruiser
Joined: Jun 2015
Posts: 222
Likes: 1
From: Northeast Massachusetts
Intermittent oil on manifold
I've been getting the smallest amount of oil towards the front of my manifold. It is basically a stain and would not have noticed it except for the smell. It took many miles but eventually a SMALL drop would form on the bottom of the manifold. Barely enough to even drop off. I cleaned off the area including rocker and head gaskets several times before a ride and checked after to try to narrow it down but I find no source. Took the tank off today to look further but still no obvious source. Anyone have this happen or likely sources before I take it down further?
Thx
Thx
Club Member
Joined: Dec 2014
Posts: 10,734
Likes: 3,755
From: SWFL
You mean outside the intake manifold behind the carb/throttle body, or inside the throat of the carb/throttle body? Wondering how it would smell also, that shouldn't get that hot as to burn off oil I wouldn't think.
Outstanding HDF Member
Joined: Sep 2014
Posts: 2,717
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From: Minnesota
Dude it's the breather, they're working more when your running and the "vapor" is blowing back and condensing on the intake manifold. There are other methods of routing the breathers then just "open",, DK has a few different methods.
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Cruiser
Joined: Jun 2015
Posts: 222
Likes: 1
From: Northeast Massachusetts
So checking around the breather bolts after riding isn't gonna help me then. In my own sad defense...I've been reaching down and giving the screen on the bolts a wipe every so often to check that. When you say vapor are we talking mist or even finer?
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Outstanding HDF Member
Joined: Sep 2014
Posts: 2,717
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From: Minnesota
It's a gas, not like fuel but like Oxygen is a gas,
https://www.google.com/search?q=PVC+...arley+davidson
Hot gases condense when they're exposed to lower air temperature
https://www.google.com/search?q=PVC+...arley+davidson
Hot gases condense when they're exposed to lower air temperature
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