Soon I will be looking for a Cav or Cally T, where do I need to look for the mayo? if there is mayo, is it a big no no or can it be corrected easily? which heads were the coscast ones? (earlyer/later?)
coolant tank, look for brown curry like stuff in thw water, it could mean
1) porous head
2) blown head gasket
3) crack/fracture in head
> is it a big no no or can it be corrected easily?
if its a porous head, youy can get it repaired for £100-£150 by v-tuning or £250 by head way (again see guide)
> which heads were the coscast ones? (earlyer/later?)
you can't tell, GM put them on when they liked. You can tell if its a COSCAST or KS head from the outside, read guide. I've never heard of a COSCAST head go porous yet, but KS can. But you never know when it may go porous, it may go tommorow, it may go in 10 years time, its a gamble.