• Husqvarna Motorcycles Made In Sweden - About 1988 and older

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

Frothy Crank Case Oil / Bad crank seals?

A

adam6402

Husqvarna
AA Class
I had the clutch cover off to put in a new clutch pack and to adjust the clutch play for proper engagement at the beginning of summer and then got caught up in a relocation due to work. It was left dry and I just got around to putting in oil today. Started up on the first kick, seemed to idle just fine, but after a few minutes I noticed foam rising up the crank case breather tube. Shut it off immediately. Removed the oil filler cap and nothing but frothy oil inside, anyting other than blown crank seals that might cause this?

Seems obvious, but before I start tearing it down just thought I'd get confirmation from the experts here.

Thanks
Adam
 
Crank seal singular. The one behind the ignition stff doesn't count. I only had one husky crank seal go bad and it made smoke not foam come out that tube. Generally folks talk of burning oil odor and not premix oil odor associated with crank seal issues. I would enquire as to whether you put in some super detergent oil and try something different. A motorcycle specific transmission fluid or perhaps since I see Kansas as your location see if a John deere dealer has hy guard in a size you feel comfortable with. Have you drained it out and let it settle to see if there is water in there which may have been turning to steam to create the foam?

Is this a water cooled one? Those have a weep hole (I have seen some filled with caulk or similar on purpose though) which I think should let water getting past the seal fall to the ground but if the clutch cover corrodes through........
 
It's my 1982 XC250. I did use an oil brand (Accel 30SAE non-detergent) that I'd never used before.

If the crank seal on the clutch side is bad, would the bike even run? The exhaust looked good, considering that I'm running 20/1 premix as the top end is new, less than an hour on it. I just started it up again, it sounds great, nice throttle response, just foamy in the case.

Adam
 
When mine failed it started fine, I got perhaps 3/4 mile and it kind of flamed out (smoke out of the breather) and wouldn't re start for a while. I got half way back and the same thing happened again, then I made it back on the third cycle. I have been offered to purchace one brand x bike which worked ok but exhaust smelled like burning oil. I am sure all modes of seal failure are different and the crank cavity becoming flooded to full with gasoline mixture could come into the equation. Mine was a 420 auto so it had a different type of fluid in it. There didn't seem much wrong with the seal but it never did it again with another seal installed. Unfortunately that seal can only be changed with case halves separated.

I don't use a transparent breather tube and usually drain the oil before opening the fill port I might look and see how much foam I have just for fun.
 
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