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CVO Technical => Twin Cam => Topic started by: guppytrash on July 24, 2011, 12:44:06 PM
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A buddy has the same 09 USE4 as me and he always has oil accumulating in the A/C and then eventually puking out on the bike?
His bike is not overfilled with oil, in fact it was half a quart low. He runs the SE A/C and I have the Arlen Ness big sucker. I don't have this problem but he does.
Can anybody explain why. Is it possible that one or both of his vent bolts or hoses are clogged?
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Yours was broken in right not his
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There are too many possible causes to list, from basic design issues to the high amount of variability in Harley's parts and manufacturing. Simple things like partially obstructed drain holes in the head that allow too much oil to build up and overwhelm the breathers have been known to cause excessive puking. Improperly assembled breathers would be another possibility. And some bikes with that problem don't seem to have any obvious defects but they puke anyway. A better overall design would be helpful, but I don't see that happening anytime soon. So the short answer is, who knows?
Jerry
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Yours was broken in right not his
I wish I'd known how to correctly break in my scooter, 'cause it's always puked oil when ridden hard. Thought I knew how to break in a scooter, but maybe not. :-\ spyder
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As Gerry said there can be other contributers as well but that is the one most are in denial about and they charge hard trying to find other anomalies and worst case buy a lot of unnecessary aftermarket gear.
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Do not rule out riding style.
Sometimes, long, higher rpm deceleration (like a long down hill mountain grade) will pull oil into the intake.
Throttle plate closed, high vacuum, can cause this.
I changed MY riding style, and the problem went away, no other changes to the bike.
THERE ARE OTHER CONDITIONS that can cause the problem, but try the simple (free) things first!
JMO
8)
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We recently had built a very potent 124"er that was "wicking" oil from the breathers into the 62mm HPI t/body, due to how hard the engine was pulling on the intake tract.
Plumbed it to the outside, and now all is good. :)
Scott
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I'll have to remember riding style and oil leakage. I thought my rear cylinder rocker box was leaking but a different shop says they fixed it and the Arlen Ness Big suck A/C was installed incorrectly. Probaly not the same issue but I guess it could be related. I didn't see any oil streaming down the side, just pooled up on the rear part of the fins on the head and minor drops on the pipe shield. Hope it's fixed.
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Another culprit ....lugging.
6th gear 2100-2200?
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guppytrash, if your friend does lug his bike he could be experiencing "reversion". (air being forced into his intake tract during valve overlap) . Tell him to keep his RPMs up and see what happens.CAHDBIKER
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We recently had built a very potent 124"er that was "wicking" oil from the breathers into the 62mm HPI t/body, due to how hard the engine was pulling on the intake tract.
Plumbed it to the outside, and now all is good. :)
Scott
So what if it still pukes after re routing the lines :nixweiss:
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So what if it still pukes after re routing the lines :nixweiss:
Rerouting the lines won't stop the puking...
It just changes the location of the puke from the throttle body to the ground (and whatever else it sprays on....)!
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So what if it still pukes after re routing the lines :nixweiss:
It still pukes, it just doesn't puke into the air cleaner. The oil either drips on the ground, or to a catch bottle that has to be emptied occassionally.
Jerry
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You can fix the root cause or get a vented catch can that emptys back to tank
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So what if it still pukes after re routing the lines :nixweiss:
At that point, I'd perform a leakdown test, and if all is well, pull the rockers, replace the breathers, and open the rocker arm support plate drain holes to .125".
As a matter of fact, that is SOP on all our in-house installs. :)
Scott
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my 96" puked oil & used oil... the dealer put in new rings & pistons and rehoned the cylinders - broke it in on the dyno
does not use a drop of oil, dry air cleaner ever since
if the rings get too hot they lose tension
some rings are not as good as others - random issue?
harley rep told me not to idle it AT ALL first 1000 miles to prevent the rings from getting too hot
in my one case they were right - i just start and ride gently away - and its perfect & its been real hot a few times since then but the oil issue has never come back.
to
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A lot of things have been said here already, but here's one more.
Maybe his brake pads last longer than yours....sound weird? Engine braking moves a lot of air in the crankcase but the closed throttle doesn't let that vented crankcase air in the intake plenum, so you pressurize the air cleaner...no place for the oil mist to go. Also, a dirty air cleaner can work to increase vacuum in the air cleaner area where the crankcase vents and this can pull more crankcase air into the intake, adding more oil mist to the area.
Just thoughts.
T
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A lot of things have been said here already, but here's one more.
Maybe his brake pads last longer than yours....sound weird? Engine braking moves a lot of air in the crankcase but the closed throttle doesn't let that vented crankcase air in the intake plenum, so you pressurize the air cleaner...no place for the oil mist to go. Also, a dirty air cleaner can work to increase vacuum in the air cleaner area where the crankcase vents and this can pull more crankcase air into the intake, adding more oil mist to the area.
Just thoughts.
T
I like this answer. I will observe to see if he engine brakes.
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did he change cams what cams did he use. I had that problem with fueling reaper 575. change them problem went away.
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Yes he did change cams SE259 I think.
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At that point, I'd perform a leakdown test, and if all is well, pull the rockers, replace the breathers, and open the rocker arm support plate drain holes to .125".
As a matter of fact, that is SOP on all our in-house installs. :)
Scott
Anybody seen this TT411B from MOCO... www.box.net/shared/cypruz2043 New bikes have heads with this modifacation
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Lou, thanks for the info.
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I detoured my puke with a couple of hoses onto the ground. I would have blowby on my right saddle bag pretty good after a long trip. I got real tired of cleaning it, so I got the hose and ran it down. Not a wonderful thing for the environment, but what can ya do. At least my air cleaner and bag stays clean. :nixweiss:
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I detoured my puke with a couple of hoses onto the ground. I would have blowby on my right saddle bag pretty good after a long trip. I got real tired of cleaning it, so I got the hose and ran it down. Not a wonderful thing for the environment, but what can ya do. At least my air cleaner and bag stays clean. :nixweiss:
I hope I remember to check out your hose routeing while we're in MV. I need to do the same deal, Stuart. ;) spyder
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I hope I remember to check out your hose routeing while we're in MV. I need to do the same deal, Stuart. ;) spyder
Good ring seal is essential for no crankcase blow-by and maximum power and torque. It helps on all four strokes.
Go ahead and route the breathers out but fix the blow-by first.
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Lou, thanks for the info.
No problem Rickasha... Hope it helps..
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Spy. I'll show you how I did it. Pretty easy and no more mess. I'm not gonna crack the motor open when this took care of most of my problem.
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My thoughts was maybe some could use this for warranty work...
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Try it. I am way past my warrantee. :nixweiss:
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Try it. I am way past my warrantee. :nixweiss:
My warranty expires on the 26th of this month.. I plan on going this week to start the battle...
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My warranty expires on the 26th of this month.. I plan on going this week to start the battle...
Got appt for tomorrow at dealer. Allready gave him the msg I got.. Will see what happens..