Coolant (drain,flush,refill) : The (Mazda) garage were I have some maintenance done advised against replacing the coolant on an older car (92). Possible danger for leaks on waterpump, radiator. What is your view on this ? (1/00)

Fact is - coolant needs replacing - it gradually loses its effectiveness (including its anti-corrosion properties), and it should be replaced at least every two years. If it's replaced regularly, the cooling system will stay clean and the coolant will stay blue/green rather than murky brown. If the cooling sytem is in good condition, it won't cause leaks. If it does (and it might) it's because there was a latent fault and that needs fixing anyway. I replace mine - and my car is 10+ years old. No probs. (1/00)