EVO All Evo Model Discussion

Repair or replace

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Old Feb 28, 2020 | 07:55 AM
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Default Repair or replace

What I thought was an oil pump leak and then was positive it came from the pushrod covers turned out to be the rear jug, right rear bottom rocker cover gasket. Got rolled, pinched would be my guess

I'll pull it apart and see if I can pinpoint the muck up.

At what condition on the rubber do I chunk it and should I get an OEM set


 
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Old Feb 28, 2020 | 07:58 AM
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Originally Posted by almostakeeper
What I thought was an oil pump leak and then was positive it came from the pushrod covers turned out to be the rear jug, right rear bottom rocker cover gasket. Got rolled, pinched would be my guess

I'll pull it apart and see if I can pinpoint the muck up.

At what condition on the rubber do I chunk it and should I get an OEM set
I would do it now.
 
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Old Feb 28, 2020 | 08:01 AM
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Oh and it you didn't do it before check the rockerbox layers for flatness.
 
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Old Feb 28, 2020 | 08:04 AM
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Originally Posted by almostakeeper
......
At what condition on the rubber do I chunk it and should I get an OEM set
At any point, under any and all conditions!
They fit, aren't too thick and generally lay in the channels exactly where they are supposed to.
Don't remember your year bike, but if it's a bottom breather, the new rubbers are white and made in China. Yes, OEM. But again, they fit like they are supposed to.
 
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Old Feb 28, 2020 | 08:06 AM
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Went out again before work, put her on the lift to get a light and my eyeballs in it. It is definitely coming from the push for upper cover gasket. I know, I got issues.


the
 
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Old Feb 28, 2020 | 12:12 PM
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If you've pinpointed to the O-ring in your heads, then that is a simple replacement with adjustable PRs.

f you don't have adjustable PRs, you can maybe reposition the O-ring (if not too damaged) and see if that would stop the leak. You can also replace the O-ring by cutting a new one 45 degree, slip it over the PR, glue it together, and install. This is the lazy, cheap person method. Of course the right way, without adjustable PRs, is to pull the rocker covers and replace appropriate gaskets. Your choice, and good luck.
 
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Old Feb 28, 2020 | 03:58 PM
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Originally Posted by daven9113
If you've pinpointed to the O-ring in your heads, then that is a simple replacement with adjustable PRs.

f you don't have adjustable PRs, you can maybe reposition the O-ring (if not too damaged) and see if that would stop the leak. You can also replace the O-ring by cutting a new one 45 degree, slip it over the PR, glue it together, and install. This is the lazy, cheap person method. Of course the right way, without adjustable PRs, is to pull the rocker covers and replace appropriate gaskets. Your choice, and good luck.
To expand on that, you can try and clean up the O-rings and seats as mentioned, and use this (link below) on them. It is a gasket dressing that never gets hard, stays tacky, and might just be the trick to save those O-rings. It is relabeled "Hylomar" which Harley used to recommend for seals, O-rings, certain gaskets, sealing up threads, etc. Don't know if they still do, but you will find it mentioned in some of their older repair manuals. Again, it goes on sort thin, gets tacky after about a minute, but never sets up like a silicone sealer. It's good stuff. Can get it at any of the big auto chain stores. Brake parts cleaner cleans it off your fingers and tools, etc

https://www.permatex.com/products/ga...lange-sealant/
 
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Old Feb 28, 2020 | 05:24 PM
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I work in the steam industry, I'm a pipefitter. But been a mechanic my whole life and it just dawned on me that it's possible to use what we use in the industry to repack valve bonnets. They make PTFE, or Teflon cord in different diameters 1/8 in 3/16 1/4-in the list goes on we also have it in flat stock but I bet if you were to use a 3/16 diameter PTFE rope that we use to pack the bonnets with I'll bet it'll work. The s***'s good to 450* so you don't have to worry about that. Maybe it's something you might want to look into and give it a shot. No disassembly of pretty much anything required except for the tubes..
 
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Old Feb 29, 2020 | 05:04 PM
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O ring looks OK, but it fits real loose up top. Pop it in place and it slides right back out


 
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Old Feb 29, 2020 | 05:57 PM
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Maybe it's just me but that doesn't look like the correct O-ring for the top of the pushrod.
 
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