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  #341  
Old 30th July 2019
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Originally Posted by 60Gunner View Post
Idk. You tell me. Every time I pulled a cover to fix a leak, I found something like that. Obvious damage that explained the leak. I assumed it was too much crankcase pressure. That got me looking into the breathers and found they weren't sealing out air for shit. And here we are.
I see that you've had several problems with gaskets but I was wondering if installation or a bad run of gaskets had been ruled out as I hadn't remembered you finalizing that.
So I assume you're thinking CC pressure split that gasket like that?
If so, that was a pretty violent environment your engine was in.

I have read other accounts of weeping gaskets etc. due to CC pressure but I haven't seen the actual carnage.
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  #342  
Old 30th July 2019
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I paid very close attention to installation. Especially after the first time. Making sure it didn't get twisted or pinched. Ensuring the alignment of the covers, etc. It wouldn't leak initially, but within a few hundred miles it would leak and leak pretty good. The damage was always at or very near the openings in the inside lip that forms the channel in the rocker boxes that the gasket sits in. A place of less resistance for the pressure to get directly to the gasket. Combined with the excess heat caused by the pistons working harder because of the excess pressure also weakens the rubber. When I pulled one warm, barely cooled enough to touch the covers, the gaskets were noticeably flimsy. This made them more susceptible to the damage.
That's my theory anyway. I think it's a fairly sound one.

From what I could tell, the stock umbrella might as well not have even been there. I blew pretty hard into one and air just continued out the other other until I quit blowing. That's failure at its finest. Why? I can only assume it's because they are cheap and flimsy compared to the one in the krankvent.
I just glad I figured out they were bad before putting too many miles on my build and I never went on any longer rides.
I'm sure I'll clean out the mess inside caused by this in a short time.
So like I've said from the beginning, run the stock ones if you think they're up to the task. I'm just glad I found a better replacement for my motor. One that can be easily inspected for failure and cleaned if necessary. And one I think does a better job than even a brand new stock one.
We replace stock parts with better aftermarket alternatives all the time. I'm not sure why the thought that these might not be the best for the job is so foreign to some.

Last edited by 60Gunner; 30th July 2019 at 16:28..
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  #343  
Old 30th July 2019
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I was wondering, Did you look at the surfaces, where the gasket goes, and see if there may be any sharp edges or nicks that could "cut" the gasket?
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  #344  
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Quote:
Originally Posted by Toejam503 View Post
I was wondering, Did you look at the surfaces, where the gasket goes, and see if there may be any sharp edges or nicks that could "cut" the gasket?
Yes I did. I even lightly sanded with 1000 grit before the last install that failed. Altho it's hard to do that channel on the lowers, I didn't see anything that would cause this. Also remember they didnt leak before. All the surfaces were thoroughly cleaned as well.
Alex at Hammer is having a similar issue with rocker cover leaks. He's done a thorough lapping after discovering some warpage. He's still weeping oil.

Last edited by 60Gunner; 30th July 2019 at 16:50..
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  #345  
Old 30th July 2019
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Originally Posted by Hippysmack View Post
That looks nice and tidy.
I have a question about the bend in the line before the filter.
What, if at all, have you noticed in the line at that bend?

I'm thinking oil / condensation could settle there even if it doesn't run up to the filter.
I guess better put, ever pulled the filter to inspect the line near the bend?

I like the 'Y' down low instead of the horseshoe up with only one side running down for the same reason.

Hippysmack,
Sorry, i forgot to follow up a little on this.
I had another check to see what was in the pipe and there was the tiniest amount of oil in the pipe. Just a tiny drop came out. No sign of any moisture this time. Washed the filter out, but it was still as clean as new really.
Stock motor/breather bolts/air filter/exhaust.
There was a pic of a gunge'd up breather bolt on here somewhere, just wondering if this would still happen with a fully syn' oil? Or does this happen with mineral oils only?
Another pic showing the plug cap boots etc.

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  #346  
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Mine were dry too when I sucking a shit ton of air back in. Have you checked to verify the umbrellas are even functioning? I can literally feel mine pulse now. Pulses out but not back in.

I'm going to check the better ring seal thing with a compression test later after I ride. If it's noticeably better, even 5lbs. higher, that's a good indication of better ring seal.
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  #347  
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Quote:
Originally Posted by harley506d View Post
I had another check to see what was in the pipe and there was the tiniest amount of oil in the pipe. Just a tiny drop came out. No sign of any moisture this time. Washed the filter out, but it was still as clean as new really.
Stock motor/breather bolts/air filter/exhaust.
There was a pic of a gunge'd up breather bolt on here somewhere, just wondering if this would still happen with a fully syn' oil? Or does this happen with mineral oils only?

That's a good close-up.
Thanks for that.
The connector to the boots special or can I get it anywhere?

That's good to hear with the line being of minimal film at best.
I'd think the true PAOs would be less likely to emulsify in the line due to their resistance to emulsifying.

But true PAOs are hard to come by.
Most 'synthetics' are really just finer quality dino oil.
So it may vary to a degree but the base oil is the same between them.
Used oil will break down to different degrees and may even show more of there similarities when worn than when new.
So, I wouldn't really think that would change the emulsion much in form.
Testing may show otherwise though.
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  #348  
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Quote:
Originally Posted by 60Gunner View Post
I'm going to check the better ring seal thing with a compression test later after I ride. If it's noticeably better, even 5lbs. higher, that's a good indication of better ring seal.
I'd like to know that also.
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  #349  
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Quote:
Originally Posted by Four Speed View Post
Morning Hippysmack, don't feel rejected,
OK,
That made me giggle.......... a lot.

I'm going over the links you posted.
Thanks for those.
I'll make some notes on them.
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  #350  
Old 30th July 2019
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You did invite it with this comment :
Quote:
Four Speed, you bring up some good questions but seem to back off conversation with me.

Quote:
He's still weeping oil.
If the components are warped beyond what the gasket can accommodate then you will probably see a proper leak i.e. dripping oil.
If it caused by excess crankcase compression on an otherwise intact gasket then you are more likely to see oil 'misting' around several gaskets.


Quote:
Originally Posted by 60Gunner View Post
I'm going to check the better ring seal thing with a compression test later after I ride. If it's noticeably better, even 5lbs. higher, that's a good indication of better ring seal.
That should be interesting. BTW 60Gunner did you see the link to the Hayden patent?

Regarding the oil/water emulsion: it is probably due to short trips and water not evaporating out of the engine. However, if my contention is correct
that more recent engines recirculate more of the hydrocarbons then that may concomitantly reduce the ability to remove water vapour.
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