• 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 The previous version was outdated and no longer supported.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!

Swm 500r 2016

R

Rytis.Jar

Husqvarna
Hey guys,
I have recently done engine rebuild on my SWM500r RS 2016 which had 230hrs. The crankshaft main bearing got exploded by surprise. I have changed all the bearings except rod bearing, new oil pump, new cylinder and piston with rings. After reassembling the engine it was running very well for about 10-15 hours. When it is cold everything is fine, but I noticed that when the engine gets warm I can hear strange sound that occurs in the head, I cannot explain, but it seems like knocking sound.

I did proper engine break in procedure and did frequent oil changes 3 times during that period. Valve pads are fine, cam tensioner as well.

What could cause this sound coming from the head?

I leave video link for you.

Thank you so much guys for your time and opinions.

View: https://youtu.be/vS0Pt4b030k
 
Rytis.Jar said:
Hey guys,
I have recently done engine rebuild on my SWM500r RS 2016 which had 230hrs. The crankshaft main bearing got exploded by surprise. I have changed all the bearings except rod bearing, new oil pump, new cylinder and piston with rings. After reassembling the engine it was running very well for about 10-15 hours. When it is cold everything is fine, but I noticed that when the engine gets warm I can hear strange sound that occurs in the head, I cannot explain, but it seems like knocking sound.

I did proper engine break in procedure and did frequent oil changes 3 times during that period. Valve pads are fine, cam tensioner as well.

What could cause this sound coming from the head?

I leave video link for you.

Thank you so much guys for your time and opinions.

View: https://youtu.be/vS0Pt4b030k
Click to expand...
Kind of sounds like the cam chain. Maybe the auto tensioner.
 
The engine is already dead. It was a crank rod bearing, which was causing that sound because piston was hitting exhaust valves and eventually it just died. Small debris went through all the engine and cylinder, piston got damaged. So if you notice sometimes small debris that stick to drain plug magnet in short period after oil change be aware maybe of bad bearing somewhere. Be safe and love your bikes guys!
 
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