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Old 09-22-2013, 10:51 AM   #1
Thanantos OP
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Lil wrenching help needed from the Harley guys please....

So, my bro-in-law recently fulfilled his dream of owning a Harley by picking up a nice '97 Dyna.

Problem is the thing leaked a ton of oil. We went through and replaced a lot of gaskets (rocker covers, primary to trans, etc.) but he's still getting some oil leaking from an unknown source. Not a ton now, but enough to be a concern.

In looking at it there's this tube coming out that's not connected to anything. Is it supposed to be?

TIA!







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Old 09-22-2013, 10:56 AM   #2
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Transmission vent?
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Old 09-22-2013, 03:50 PM   #3
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Looks like it to me. Does it need a cover or to connected to anything?
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Old 09-22-2013, 04:07 PM   #4
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That's a transmission vent and it doesn't connect to anything.

Did you replace the gaskets between the top surface of the heads and the bottom of the rocker boxes?
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Old 09-22-2013, 07:06 PM   #5
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Where is the oil winding up on the bike?
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Old 09-22-2013, 07:18 PM   #6
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Quote:
Originally Posted by tallbob View Post
That's a transmission vent and it doesn't connect to anything.

Did you replace the gaskets between the top surface of the heads and the bottom of the rocker boxes?
This was the ticket. Figured it out tonight.

I believe it was previously replaced, poorly, with an aftermarket paper gasket that blew out.

Metal, OEM, HD gasket installed tonight under the lower rocker cover. We didn't finish it, but I'm confident we found the culprit.

As far as that tube goes, I still wondered so thanks for the replies. I won't worry about it.

Side Note:
This bike was the first HD I've ever worked on, but it was neat. They seem like a strange combination of motorcycle and automobile technology. I came away with an appreciation for the engineering though.
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Old 09-22-2013, 07:30 PM   #7
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Great, they all leaked after a while until replaced by the upgraded metal gaskets.
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Old 09-22-2013, 07:31 PM   #8
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Great, they all leaked after a while until replaced by the upgraded metal gaskets.
Thanks again buddy. I appreciate it.
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Old 09-22-2013, 08:45 PM   #9
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Done your base gaskets yet?
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Old 09-22-2013, 08:50 PM   #10
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I wouldn't worry about your base gaskets until/if you see evidence of a leak there. Let that motor warm until the heads are warm to the touch before you leave the driveway and it'll be fine.
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Old 09-22-2013, 08:54 PM   #11
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I've heard about this issue from a friend of mine who's a Harley guru. I passed it on to my bro-in-law, but thanks for the reminder. I'll remind him again.
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Old 09-23-2013, 10:29 PM   #12
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I had a 98 FXDWG

I was always careful to warm up the engine and took very good care of the machine. Those fricken rocker box gaskets just refused to stay dry.

It was the only problem I ever had with the bike.

I would look to an aftermarket solution unless somebody here knows the secret to keeping them intact.

they never leak much (quantity) but it sure makes a mess.
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Old 09-23-2013, 10:42 PM   #13
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Do you have the OEM, metal gaskets under the lower?
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