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Buell Forum » Old School Buell » S2 Thunderbolt » Archive through December 18, 2016 » XB Valve Cover Question « Previous Next »

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Johnod
Posted on Thursday, May 26, 2016 - 03:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Installed the above, along with the T Storm stuff this winter.
Today Is the first miles on, since those mods.
From Valve covers to catch can, to breather over rear tire.
After about 50 mi stopped for lunch, went back out and there's some sort of ick on my rear tire, turns out the breather is dripping, what looks like oil/water mix, creamy white,oily. I open drain on catch can, and maybe half cup of same stuff runs out.
The oil in oil tank looks fine.
The bike is not overfilled, it may be under, but not over.
So what is happening , anyone?
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Two_seasons
Posted on Thursday, May 26, 2016 - 05:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Oil/Water mix. Normal. Exacerbated if you start your bike in the Winter months.

Unless you take your S2 on a long ride, you will continue to get this. Kinda of looks like White Lithium Grease.
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Johnod
Posted on Thursday, May 26, 2016 - 05:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yep that's what it looks like.
Bike was never started, during winter.
Started first time last week, with fresh oil.
Are you saying I can expect this every time I go for a short ride, forever?
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4speeder
Posted on Thursday, May 26, 2016 - 08:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If the oil in the tank is not cloudy with moisture and its only milky coming out of the breather tube, then the hot vented engine oil must be mixing with water condensation inside the catch can before exiting the tube. Along with the normal condensation inside the engine as it warms up venting out the breather. If thats the case then you aren't risking any engine damage. As Two Seasons said, taking it on a long ride to allow all the condensation to evaporate should clear things up. Its the same as driving your car short distances and the exhaust system sweats and you end up with water in the muffler and pipes. Driving it 20 miles or more will allow all the water to evaporate and dry out your exhaust system so the pipes don't rust out so quickly. Driving or riding short distances and not allowing the normal condensation inside any engine to evaporate is a lot harder on an engine than driving it long distances where everything can dry out. Continuous short distance riding or driving will sludge an engine up, although modern oils minimize it a lot better than oils did 25 years ago.
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Johnod
Posted on Thursday, May 26, 2016 - 09:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I hope that's it.
I did about 50 mi today.

Are you supposed to use the umbrella valves with the XB set up?
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Jolly
Posted on Thursday, May 26, 2016 - 09:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

With the XB rocker box cover you eliminate the middle spacer and the umbrella valve.
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Johnod
Posted on Thursday, May 26, 2016 - 09:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That's what I thought, just checking see if I screwed up.
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Phelan
Posted on Friday, May 27, 2016 - 02:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just curious, is your rear PCV rubbing the gas bladder? That happens occasionally on S2s. Unrelated to your post; others covered that well. Condensation build up being evaporated out. It's normal, not just in winter, but in very humid, rainy conditions as well.
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Johnod
Posted on Friday, May 27, 2016 - 03:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Phelan, re PCV, yes it did, so I'm running two front covers.
I can make you an excellent deal on two rear covers, : )
Hope you're all right, re the moisture.

(Message edited by johnod on May 28, 2016)
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Ratbuell
Posted on Saturday, May 28, 2016 - 10:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Weather doesn't make a lick of difference, it's the heat/cool cycle of the engine oil itself that causes spooge.

If you don't ride the bike long enough to burn the condensation out of the oil, you're going to get the spooge.

Air-cooled bikes do NOT have thermostats; they take longer to get up to temperature than a liquid-cooled motor. Like the charging system (ride it long enough to put juice back in the battery), I don't recommend "short hop" rides without either being OK with spooge, using a battery tender, or both.
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Phelan
Posted on Saturday, May 28, 2016 - 05:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Keep in mind that two front covers puts the rear PCV lower than ideal position, so you will get a bit more oil blow by and a side effect.
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Johnod
Posted on Sunday, May 29, 2016 - 11:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That's true, but I figure that would be pretty negligible.

I could be wrong, just a guess.
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Brother_in_buells
Posted on Saturday, June 11, 2016 - 03:36 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Some one on here did cut a pcv valve and lowered it a bit to have enough room under the fuel tank
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Johnod
Posted on Monday, June 13, 2016 - 08:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ya I saw that.
Took it out for another ride seems fine now.
Must just have been residual condensation , as pointed out here.
Thanks
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Harleyelf
Posted on Thursday, June 16, 2016 - 01:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I, too, had a bit of contact between the PCV valve and the gas tank, so I used a valve cover that placed the PCV valve lower than it should be. This covers the air inlet with oil. It pumped oil constantly out of the vent tube and totally slimed the rear of the bike on my 75 MPH 62-mile commute to and from Orlando / Melbourne.

Now I have a rubber spacer (VW oil cooler seal) under the tank mounting plate and both PCV valves properly positioned at the high points of the heads, and a 1250 kit from NRHS. No more slime.
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