It will start go down road it stalls wont start for 15 minutes

Sou.deaths like a engineer or exasut valve not seating once the engines hot the engine stalls from low compression and will just crank round and not start again until the engine has gone cold .
Youl need to have the head removed and checked for two things 1 a valve still open when it should be used a bent valve stem 2 a thermal crack in the engine block if the block is cracked your need a knew engine block to fix the problem