Mazda MPV 1995 , over heat quickly

I do not know about newer cars, but on my old standard ignition Ford, I found that the timing advance was not working (bad vacuum advance). On yours it would most probably be caused by a bad sensor associated with speed inputs to the computer. A quick readout of computer diagnostics will probably lead you to the problem. I hope this is helpful to you.

IF you have a motor driven fan it will be connected by a viscous fan hub . replace the viscous fan hub as it is not working and pulling air through the radiator when you need it most. I imagine that the temperature will be higher than normal while sitting at lights . If it is an electronic fan the run fault codes and look for fan relays --fuses-- and temperature coolant sensor, problems.

In most cases this means you have a defective transmission and the tow were just a coincidence.

check or replace the thermostat then check for radiator leaks and sludge in radiator flush out radiator and all water in engine replace with fresh water and anti rust stuff check all hoses connected to radiator and the heater for leaks

you will have to fill the cooling system and get all the air out of the system at the same time you can see if you notice a leak anywhere(dripping of liquid)and if so trace were the fluid is leaking out of.once the cooling system is full pressure test the system and see if you see a leak and find were its leaking.once you find whats leaking then you will know what you need to fix it.

yes and no i found it easer to take the fan off with the radiator and cover

You have air in your cooling system. Fill your cooling system when the car is cold. First check the radiator if it has a cap, fill that first, replacethe cap tightly, then fill the overflow tank to the indicated level. Start it and turn the heater to the full hot position. Let it run untill it reaches opperating temperature. Quickly squeezing the upper radiator hose 3 or 4 times every now and then to "burp" the system. look for leaks. If this does not solve the problem you may possibly have a headgasket leak.

1. The radiator fan relay switch may be bad. Replace the little black box in the fusebox under the hood.
The socket is marked "Radiator fan".

2. The radiator fan may not be spinning. The motor may be disconnected or burned-out.

3. The lower radiator hose may be collapsing. It should be "firm" and not "squishy". There is a metal stent lining the hose. It may have rusted and collapsed.

You probably never cleaned the cooling system out.

If you have not get it done by pros.

It seems something is blocking the flow. If the water pump went bad you will know. Rarely ever heard a impeller breaks off like you think. The bearings and the seal break first.

Check and see also if the heater valve is working.

As for the over heating even new thermostats fail. Reverse flush is needed or the procan measure the pressure in the radiator cooling system and edetermine if there is a engine pressure problem. Tools and experience is the key in the game of diagnosis.







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possible blown head gasket