I just add coolant on my toyota previa 1991 if im on heavy traffic my thermostat rise.
Does your cooling fan work?
Yes sir the fan works.
You said you add coolant was just one time or you have to do it often?
Looking for a Used Previa in your area?
CarGurus has 21 nationwide Previa listings and the tools to find you a great deal.
Search Toyota Previa Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Toyota Previa Experts