rzero

I need some help,my rx-7 started getting hot really fast,we have replaced the them. thing like twice and we just got a new water pump,should that fix the problem

banzaitoyota

Bear with us.
What brand therosatat and waterpump. It is recommended; based on hard earned experience; NOT TO USE AFTERMARKET THERMOSTATS and WATERPUMPS.

now,
A. Have you had a cooling system pressure test done. You need to to see if you have another leak or a blown coolant seal .
B. Is the stock cooling fan functiong properly?
C. Are all the cooling shrouds and underbelly trays intact and installed properly?
D. Are your Radiator and oil cooler fins clean and unobstructed? You don'e have a dead cat stuck in there do you?
E. How aol are your hoses, your suction hose could be collapsing.

F. When you replaced the waterpump did you inspect the housing surfaces?
Over time with bad coolant the housing can erode causing a reduction in coolant flow.
Belt tension proper?

This is a start.
Also use the search function, this question is/has been answered a couple of times a monthe
Goto www.fc3s.org download the Factory Service manual to help yourself out.

John

SureShot

Like banzai says.
For step B: The fan should pull really hard up to about 4k when the motor is hot. It should maintain about 4k as the motor revs higher. Sometimes you can get more life from it by bending outward the bi-metal strip on the front of the fan clutch. The cut-in for the series 4 fan clutch is gradual – it pulls some even when cold. If yours slips at 2.5k, that won't cool it.
The fan clutch will sneak up on you after 100,000 miles. It wears out very gradually.

vaughnc

usually it's:

- Check for leaks
- check hoses
- verify no blue smoke (ie coolant seal)
- coolant flush (get the powder, not the el-chepo stuff)
- replace thermostat
- replace the water pump