Originally Posted by
Renault_Tech
i have an N12TS1/RT and was mucking around with a few spare parts i had from other engines and found that the head from the O.S TZ fits on there. The Nova head has 10 cooling fins and the TZ has 9. Could i use this head without affecting it at all? The blue from the OS looks better than the uncoloured head from the Nova....

That shouldn't be a problem, It's nothing but a radiator anyway, if it fits and keeps it cool enough there is no problem.