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Fe550 Cylinder scoring and rebuild options

Joined Apr 2024
3 Posts | 0+
Canada
Hello,

I picked up up a project 07 fe550, it started burning oil on the PO, he took it apart and there it sat. From what I can tell something scratched the cylinder, causing a lot of blow by or oil getting passed the rings.

The weird thing is the valves look just fine, and so does the piston. It has a couple of scratches on it but none that line up with the mark on the cylinder.

So any opinions on what caused it? Something sucked through the intake?

Also, for rebuild what is available? Are there any larger bore sleeves, high compression pistons, cams ect available? I'm very new to husabergs so whatever worth while mods or upgrades to do while I'm in there would be good to know.

Thanks!

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100295 - 81530005000 Cylinder Liner 100mm 550 2004 - 2008, Taffmeisters

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the PO could have put the oil control ring together wrong and thus the scratch mark? if its poorly put together it will pass oil. If it was a valve guide oil seal then a look down the exhaust ports should reveal wet valves. if bone dry then it isn't them. even if they were wet I still don't think valve seals can pass enough for it to be noticeable.

Its usually the piston.

I have most parts in stock.

Taffy
 
the PO could have put the oil control ring together wrong and thus the scratch mark? if its poorly put together it will pass oil. If it was a valve guide oil seal then a look down the exhaust ports should reveal wet valves. if bone dry then it isn't them. even if they were wet I still don't think valve seals can pass enough for it to be noticeable.

Its usually the piston.

I have most parts in stock.

Taffy
I have been browsing your website quite a bit!

The odd thing about the engine is that the PO said he hadn't done any engine work and had disassembled to find the cause of the oil. The valves don't look wet but they do look as you'd expect from and oily combustion.
 

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