Oil mist blow-by from front of head.????
#1
04-23-2018, 12:55 PM
Oil mist blow-by from front of head.????
2007 Dyna FXDB. 10.5 cr 107 in.
I am only about 100 miles into the break in on this build. It has the AN Big Sucker. No separate breathers or anything, just the bolts.
Noticing increasing oil misting on right side of engine.
The source is not the air cleaner. It’s coming from the front of the front head. The space below the front rocker where it meats the head. Where you can look in front from the front of the engine where the front header connects to exhaust port. It is wet there. Oil seems to be coming out from that space in front, from rocker breather area. Oil spray from front blows to front of throttle body by the cables, exhaust and some spray all the way back to the saddle bag.
So, is this normal and can be corrected by an external breather assembly with catch can? Or is it something else within the rocker or head that needs attention? I have no clue.
Thoughts?
I am only about 100 miles into the break in on this build. It has the AN Big Sucker. No separate breathers or anything, just the bolts.
Noticing increasing oil misting on right side of engine.
The source is not the air cleaner. It’s coming from the front of the front head. The space below the front rocker where it meats the head. Where you can look in front from the front of the engine where the front header connects to exhaust port. It is wet there. Oil seems to be coming out from that space in front, from rocker breather area. Oil spray from front blows to front of throttle body by the cables, exhaust and some spray all the way back to the saddle bag.
So, is this normal and can be corrected by an external breather assembly with catch can? Or is it something else within the rocker or head that needs attention? I have no clue.
Thoughts?
#2
04-23-2018, 01:34 PM
#5
04-23-2018, 03:51 PM
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#7
04-23-2018, 04:35 PM
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#9
04-23-2018, 06:42 PM
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When the gasket is installed incorrectly, it make a messy oil leak. It fits both ways - correct and incorrect.
Last edited by Ed Ramberger; 04-23-2018 at 06:44 PM.
#10
04-24-2018, 02:14 PM
Cruiser
Thanks for the advice and pointing me to the lower rocker gasket. Well, I removed the top rocker and lower support plate. All looks good. It’s oily but the gasket was definitely in correctly. The oil passage was not blocked.
Then, I examined the edges of the plate and mating surfaces of plate and head. No cracks. No visible defects. Smooth. The Cometic gasket appeared fine.
I cleaned up as much oil as I could.
So, now what. I guess I will replace the gasket anyway. But not sure why this happened. It may happen again even.
So what else can I check before buttoning it up?
Then, I examined the edges of the plate and mating surfaces of plate and head. No cracks. No visible defects. Smooth. The Cometic gasket appeared fine.
I cleaned up as much oil as I could.
So, now what. I guess I will replace the gasket anyway. But not sure why this happened. It may happen again even.
So what else can I check before buttoning it up?