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  #21  
Old 12th August 2019
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Yes.
You've also got a base gasket leak.
That will require pulling the heads and cylinders to fix.
While you have them off, run a straightedge across the case surface, cylinder to head surfaces and rocker box 'pieces' surfaces.
I am skeptical of pointing to high CC pressure since it's only one cylinder leaking?
But I haven't studied if that could be a problem with only one bad umbrella.
But with your average for leaks, it'd be good to rule out the mating surfaces as being the problem.
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  #22  
Old 4 Weeks Ago
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Quote:
Originally Posted by Hippysmack View Post
Yes.

You've also got a base gasket leak.

That will require pulling the heads and cylinders to fix.

While you have them off, run a straightedge across the case surface, cylinder to head surfaces and rocker box 'pieces' surfaces.

I am skeptical of pointing to high CC pressure since it's only one cylinder leaking?

But I haven't studied if that could be a problem with only one bad umbrella.

But with your average for leaks, it'd be good to rule out the mating surfaces as being the problem.
I think that oil actually came from a leaking horseshoe breather, the same day I noticed the rear cylinder leak, I also noticed the front cylinder breather spit out a lot of oil. Last time I checked my oil it was low, so I filled it to 1/2 way between the lines, then noticed the leak. I'm hoping that this bike likes less oil, leading to leaks.

I've noticed it's been shaking more lately, my ignition switch housing brackets broke twice recently and 2 keys snapped as I was taking them out.

If it's something more serious, I'm not sure I want to deal with it, I lack the knowledge and it's getting expensive.

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  #23  
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Yep, that would do it.
When's the last time you replaced the breather umbrellas?
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  #24  
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Quote:
Originally Posted by Hippysmack View Post
Yep, that would do it.
When's the last time you replaced the breather umbrellas?
Around Februrary, when I rebuilt the bike with a Hammer 1275 kit.

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  #25  
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Broken ignition brackets and keys are far from normal. I would expect the Hammer kit to be quite well balanced. Take a good look at all of the motor mounts. The 89” motor in my 2000 is smoother than any previous package in that bike. From Stage 1, .20 over at 10 1/2, and now stroked. Additionally, it had base gasket seepage a couple times but I found a couple of good, long hot runs and they sealed up, go figure?
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  #26  
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Quote:
Originally Posted by sportsterpaul View Post
Broken ignition brackets and keys are far from normal. I would expect the Hammer kit to be quite well balanced. Take a good look at all of the motor mounts. The 89” motor in my 2000 is smoother than any previous package in that bike. From Stage 1, .20 over at 10 1/2, and now stroked. Additionally, it had base gasket seepage a couple times but I found a couple of good, long hot runs and they sealed up, go figure?
I checked all the motor mounts, tightning all to 30 ft/lb. One lower front bolt had some slack, most were either good or within 1/5 turn of 30ft/lb.

I also cleaned out the breather kit and installed new rocker covers (my old ones had half their chrome peeled off) and re-checked rocker cover bolts, they seemed good, except the two rear rocker arm bolts closest to the spark plug had slack enough that I could turn their washers, even after tightening them to 18 ft/lb, but I remember them being like that when I disassembled the engine.

I'm going to Chicago for a job interview, so wont be testing the bike till Saturday, but I hope something I did makes a difference.


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  #27  
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Fingers crossed for you!
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Quote:
Originally Posted by Skuzeee View Post
I checked all the motor mounts, tightning all to 30 ft/lb. One lower front bolt had some slack, most were either good or within 1/5 turn of 30ft/lb.

I also cleaned out the breather kit and installed new rocker covers (my old ones had half their chrome peeled off) and re-checked rocker cover bolts, they seemed good, except the two rear rocker arm bolts closest to the spark plug had slack enough that I could turn their washers, even after tightening them to 18 ft/lb, but I remember them being like that when I disassembled the engine.

I'm going to Chicago for a job interview, so wont be testing the bike till Saturday, but I hope something I did makes a difference.
a

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I am making the assumption that you're talking about the cover bolts.. not the bolts that hold down the lower rocker cover..
so.. that is not a good thing and is why you keep getting leaks. the 1997 model year uses a gasket under the washer to keep oil from seeping out the screw hole..



Possible fixes..



#1) remove the rocker covers and check the rocker housing where the bolts go into for obstructions. Obvious ones include old loctite, silicone or oil, reinstall the rocker covers with new bolt gaskets and see if things are better.. if not....

#2) replace the bolts with different ones. available on the 2010 sportsters and backwards compatible. washer 6589A and screw 2486. after checking that the screw holes are clear of obstructions.
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  #29  
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Quote:
Originally Posted by ReddTigger View Post
I am making the assumption that you're talking about the cover bolts.. not the bolts that hold down the lower rocker cover..
so.. that is not a good thing and is why you keep getting leaks. the 1997 model year uses a gasket under the washer to keep oil from seeping out the screw hole..



Possible fixes..



#1) remove the rocker covers and check the rocker housing where the bolts go into for obstructions. Obvious ones include old loctite, silicone or oil, reinstall the rocker covers with new bolt gaskets and see if things are better.. if not....

#2) replace the bolts with different ones. available on the 2010 sportsters and backwards compatible. washer 6589A and screw 2486. after checking that the screw holes are clear of obstructions.
It's not the rocker cover bolts, it's the two I colored in. They are torqued correctly and both fit the same way, so maybe it's correct?

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  #30  
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Can you flip that over and take a pick?
With those two bolts being loose, I'd be concerned about the condition of the rocker arm pads.
If those two bolts won't tighten up on your old heads, that definitely would explain the leaks.
Check the threads and check the bolts for warpage.
I can't remember if you checked the lower box for warpage but check that also with a straight edge if you haven't already.
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