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Hi, any ideas as for why my 1990 na6 import is over heating would be great.
ive changed the coolant and thermosat and water pump seems to be working but still overheats 10 or 15mins into a drive...
so a bit lost as for my next step in trying to fix da problem.... and dont really want to get my mech to start a blind search of the problem...as i might need new parts etc...
anyways any ideas would be great n thanks in advance!

Theres a good chance the cooling system is full of gunk and needs a good flush, mine was like this when I bought it.

i did flush the radiator with the hose when i changed the coolant... not sure if thats enough...?

A clogged radiator, my brother owned two MX5s and both suffered from blocked radiators due to crud in the system.

Fans kicking in?

When I first got my MX5 it was overheating due gunk in the cooling system.

yeah radiation fan(left hand side one) kicks in... but the air con one seems to hav died(right hand side). was working b4... so initally thought that was the problem...