We've now stripped the engine and found that the side of pistons 1 and 3 have broke off and been smashed to pieces in the cylinders, the sparkplugs on those cylinders also took a hit and the head has the odd few marks on it which should be fixable.

Whilst its in bits we have some steel rods and a set of forged pistons to go in, the rods will eventually bend under the torque and the pistons that broke were only cast pistons so this is the right time to sort that without too much hassle.

Anyway here is the pics :