Husqvarna snowblower with Briggs engine valve guide issue

[Auto Doc's]

Thanks for the update picture.

Now, I think that picture better confirms the exhaust valve guide has moved up in the casting due to an overheat condition. (Poor B&S design) I can see that the exhaust valve guide is not sticking very far at all on the combustion chamber side.

At the moment, I do not have a used head to inspect and verify.

I suggest you temporarily reassemble the head and install tight with the old head gasket, set the valve lash and rotate the engine by hand slowly to see if the valve rotor (spring retainer) is close making contact with the top of the valve guide has the exhaust valve operates.

Just driving/pressing the guide back down, just means it will do it again.

 

[slomo]

I removed valve cover and found exhaust pushrod disconnected and intake valve bent.

Are you clear on what caused this issue? Lack of valve lash checks or over heated the block, maybe both? Both of these are YEARLY maintenance items in every engine manual out there. Just letting you know this was all preventable.