My brothers Estate Dtub

[Diggers]

To me that looks like the belt has slipped what with the cam being snapped and all, it looks as though the valves have been slammed home by the piston pushing them up into the cam and snapping it clean in half while at the same time snapping one of the rods,

You said it had no oil pressure which is also possible that it could be the oil pump chain having snapped of the pump its self having shit its self as they are directly behind that hole too!

we did think about the timing belt.
it looks neerly new BUT there is alot of stringy bits from a past belt in the casings, so maybe the belt was changed but nothing else.

also i just realise, we havent got a boost compensator feed not anywhere to run a gauge (once he buys one)
might have to send one of the ally pipe in for welding ally welding isnt cheep.