Hi ,it seems that the bolt holding timing chain gear onto the cam gear became loose and the dowel that drives the cam gear broke [ hence my other post on head removal ]
There was a little damage done to the timing sproket but thats included in a timing chain kit.
There does not appear to be any damage to the cam gear, as to the hole that receives the dowel.
Looked on Ebay and a 4mm hardened dowel is $6 , its longer than needed but I will just cut it back to length, being carefull not to get it too hot.
Has anyone done this before as i believe you have to buy the gear and dowel together from Nissan.
10 min. later I have just rung a large Nissan dealer [Barossa Valley ], says the part is not listed.
Thanks