You've spun the bottom end (probably stretched a rod bolt?). I know that noise, the rod hasn't come off yet 
You won't need a new head though, just regrind the valves. mine was okay and it was hammering like that for 150 mile round trip to glasgow and back. You could see the valve outline on the top of the piston lol
p.s when the rod comes off, be prepared to whack your head off the steering wheel when it jams between the crank and the block.
You won't need a new head though, just regrind the valves. mine was okay and it was hammering like that for 150 mile round trip to glasgow and back. You could see the valve outline on the top of the piston lol
p.s when the rod comes off, be prepared to whack your head off the steering wheel when it jams between the crank and the block.
A moments silence please, for our brothers in the NAD-zone.