Husky engine failure

Hello friends,
My name is Ron and I’m relatively new here. Read a lot but nothing posted until yet. Top forum I like a lot.
Sorry for my not always correct English, I’m from Austria .)

Recently I found an engine failure video on YT and now I would like to get some more information about this case, because unfortunately my own TE has made pretty similar sound on weekend, and because of a lack of time I haven’t opened it yet.

From hearing it sounds like nothing explode but something definitely got demolished in the process.
Most likely, I guess it was a valve issue and some more damage could have been occurred to entire head?
Maybe someone was so unlucky already and can give some assessment about?
Here is the video – failure starts arround 05:08


View: https://www.youtube.com/watch?v=OHclMuQR66w


Many Thanks for any input
br Ron

Sounds like it started laboring before 5:08 when it locked up.

You have to take it apart.

I would say crank/rod bearing.

I'd guess upper end too, Ron (valves or rings or piston or all 3). If it was the lower end, an oil drain might tell you... or might not. But whatever it is, it's gonna be a major job (or even huge).

Your English is great.

I'd say it dropped a valve. I was making the same noises he's making when mine took a dump this morning!

A dropped valve is so much better on an inline 4. You can still finish the race except on a road course you end up sliming the entire track with oil. My head was shot peened in that cylinder, piston was a donut and remnants of parts in the sump. Complete dissasembly... new carillo for that cylinder and new head, new sleeve, crank OK.

TE 310, what year ??

Folks,
I'm pretty happy to read some comments here so quickly.
I'm struggling a bit without a ride but looking fw to get the issue resolved soon, or at least knowing the details. I'm not interested in paying 500+ for checking entire engine outside of the bike in a Shop; with the result a new bike would be wiser at this case.
So I decided to I take my time go the hard way here and figure it out by myself... learn something for the future. By the way it’s fun. Bad thing is I have very limited time this week.
Don’t know which year the TE of the video is. My 310 is an 11 with 303 hours on it (11,5km), checked valves 40 hours ago in a shop. (Before that every 100) and always ok so far. Always keep an eye on oil, filters and everything.
I’m riding more Enduro/mx then street, but clearly not world class.
So I recently used 2 hours to get the ball rolling.
Trained oil and coolant but nothing found. A bit less oil for sure but nothing visible in it
Checked oil filter - nothing in it
Checked oil filter mesh - found some small black parts, looks a bit like plastic

Started up with the ignition side, pulled out flywheel and directly found some item I can't identify for sure but shouldn't be there.
Could be the timing chain slider?

Continued with the head and so far only marginal fragments of the same item already found.
As far as I can see top end of the Cylinder is looking good
Had no more time but can’t wait to see the piston + lower side of the valves.

Will be continued...

Here's some more
Many thanks for any help

I'm no expert but your inside of flywheel looks mashed.
And it's gotten very warm to discolour like that...

I was finally able to make some progress. A big problem seems to be defect crankshaft inc. bearings, because I found out connection rod has a lot of vertical play. It seems all turning smooth when I turn the flywheel.
Also con rod is blue at the bottom end. Cylinder might needs to be honed as well.
New piston would be no issue because I planned it anyway.
There could be some more surprises inside the body. Clutch side was opened and seems to be all ok there. Found nothing unusual at all.
Any comment is welcome
cheers!

cheers

Looks like part of a tab of plastic coming off the stator winding?

Thanks Norma!
It really came from top of the stator winding. At least it did not make all the way through the engine, never the less small junk of it was found at top end and oil mesh filter.
But this shouldn't result in a wipe out such as we can see in the video above, right?
My up and down play looks way beyond limit and like there is no bearing anymore. I have uploaded a video.


Any recommendations if it would make sense to buy just a connecting rod kit, or will it be better to buy the complete OEM crankshaft for about 350 (no pressing for replacement and so needed) in case rod parts not the only damaged parts?

Unfortunately I can't split it now because I have no tool at the moment.

I’m thinking about handle the engine over to a shop at this point, but before ordering some parts like new timing chain, gaskets, crankshaft, inner bearings and caps first, let them do the mess and check everything inside.
This option would fasten the process a lot for sure.
Next week I will try to get a offering from a local husky dealer.
Still need to check which piston size I need for an aftermarket. OEM would be about 220 with only one size, AM 170...
cheers

The discoloration is from the heat treating process of the area where the one way bearing for the starter goes.

You need a new crank. Make sure you disassemble and clean everything to get all the metal shavings before reassembly.

keep an eye out for an oil system failure (oil pump?) too. It's hard to tell how bad that cylinder is scored also... can you feel the striations?

it looks like shit got hot. hows the water pump & cooling system?

also: joedirt called it (bottom end). good job.

There is some discussion about oil filters and the length of oil filters in this thread http://www.cafehusky.com/threads/beware-all-13-redhead-owners-blown-hose-more.40268/page-5 Using the wrong oil filter or one that is too long could restrict oil flow.

It looks like a HiFlo HF116 so he is probably okay there (if it is). but I would inspect it for clues to just what the hell is going on.