I have removed the head and can see the pistons (end 2 are fully up, middle 2 are down)
looking at the valves they are not all fully meeting with the round holes, the 2 barrels i can see feel smooth and no scraping or anything, the tops of the pistons have pitted bits in line with the valves
this is all I can see, and dont know what to look for now.
how do I check if all the valves are bent, and if the pistons + rings are all ok??
and just generally what to look for to make sure its worth while buying a new head and building the engine back up.
thanks again for your help
You'll only be able to check them properly if you take them out. Even ones that appear straight can be knocked out of trueness.
Pistons usually are ok, unless you were traveling at high speed or high revs. If there are no cracks or nasty marks/digs in them then they will be ok. Usuall what happens is on contact, the pistong bents the valve to face the piston.
there is 4 bits on each piston in line with the valves, its not deep (maybe 1-2mm) but its there - is that a problem
the guy i got the car from did say there was a big bang one time he tried to start it
(timing belt was stripped btw)
the Torx set I bought for getting the head bolts off...its a 3/8 drive...I had to end up putting 2 steel tubes on either end of a T-Piece to get enough pressure, is there a seperate tool for that too ?