remove the gearbox (10 min job) and remove one of the clutch cover bolts. stick a small screwdriver or strong drillbit through the hole (try and get the hole to about 11 o clock position) and there is a space in the block which the bit will slot into and lock the flywheel in place.

i got the same problem with a c20xe im rebuilding shoot wen u relise aint it.

well, tried that, couldnt find any suitable metal :( leave it for tomorrow now i reckon

maybe it has some tread lock heat it a bit with hot gun !

You will also need the engine well secured, maybe wedge it against somthing and jam some planks in from either side.

If you have the gearbox off then bolt a piece of metal onto one of the gearbox bolt holes and have it do it jams into the fly wheel tooth.

If the gearbox is still on then put a small piece of metal in one of the teeth of the flywheel and jam it in the starter motor.

Then get a BFO leverage bar and give it some 'who are ya'

how the fluck do i get it undone?
engine is out of car, just turns the crank etc when i turn it :( tried to lock the assembly up by using a screwdriver through a hole and into the teeth, but then i succeeded in rocking the whole engine over rather than undoing the bolt :(

HELP!