Rb30Det Head Back Onto 25 Bottom End Q's

[the_jack]

g'day

i have an rb25det head that has bin modified to go onto an rb30 block.

i have decided to go back to an rb25 bottom end as the 30 one is stuffed and i scored a free rb25det bottom end.

the vct oil gallery on the head has bin welded up and i have drilled out the copper bung as per the rb30det conversion thread.

what do i have to do to put the head back on a 25 bottom end? i dont realy want to drill the oil gallery on the head back out...

cheers

[The Mafia]

Leave it as is and the VCT will still work. You might have to block it on the engine block though.

Not sure why you'd go back to a 2.5L though.

[JonnoHR31]

It'd be easier to get another 30 bottom end but if your dead set on going back to a 25 then find another standard head, dont bolt the welded one straight onto a 25 block.