Why is my Miata leaking coolant?

So this could be a crack in the radiator, a crack in the engine, or some old brittle hosing between the engine and the radiator. A crack in the engine would be the worst, followed by a cracked radiator. If you get off lucky, this could just be a simple and cheap hose replacement.

Is Miata coolant reroute necessary?

That’s up to you. It won’t hurt and it won’t help. I think the coolant reroute, while not absolutely necessary for most owners, is still a fine idea as a mod to improve the cooling system.

Where is the cooling fan located on a Miata?

The base Miata has one fan, mounted on the left (looking forward) side of the radiator, called the Radiator Cooling Fan. The Radiator Cooling Fan motor should use 5.3 – 6.5 Amps.

What should the coolant pressure be on a Miata?

The pressure in the Miata cooling system should be between 11 and 15 psi (25.7 to 29.7 psia) maximum, which would place the boiling point of a 50/50 coolant mixture at around 265¡F (at 15 psi) according to the Prestone labels.

Is the water thermosensor on a 1990 Miata?

The 1990 FWM is written as though the Water Thermosensor is the temperature gauge sensor, which it is not. There is no data on the actual gauge sensor, although the manual spec on the gauge itself states that the gauge should point to ÒHÓ for a resistance to chassis ground of 20 ohms (18 ohms for Canadian cars). Coolant Flow

What is the boiling point of water in a Miata?

The boiling point of water at 14.7 psia is 212¡F, and if the pressure is increased, it rises. The pressure in the Miata cooling system should be between 11 and 15 psi (25.7 to 29.7 psia) maximum, which would place the boiling point of a 50/50 coolant mixture at around 265¡F (at 15 psi) according to the Prestone labels.

The base Miata has one fan, mounted on the left (looking forward) side of the radiator, called the Radiator Cooling Fan. The Radiator Cooling Fan motor should use 5.3 – 6.5 Amps.