18 hp Vanguard twin with stuck intake valves due to old gas. Is there any way to get them freed up without removing heads? This is in a machine where engine would need to be completely removed to do the job. I wondered if i could get them free enough to start? Then run a serious mixture of seafoam or something to clear them off? Is this wishful thinking? Just trying to help an old neighbor who only runs this machine an hour or two a year (hence the stale fuel). It ran for a few minutes this spring and then bent a push rod.
Thanks.
BLES