butt... I finally got my car running.
In the process of working out the throttle hesitation but figured now i can flush the coolant system and oil.

how exactly to do i flush the coolant???

oil i just drain after letting it idle correct?

 

Absolutely not.

If you want to do a complete flush you need to drain the radiator and the block. If I recall correctly there is a block drain by the driver side engine mount.

 

Buy a flush kit from Vato Zone. Pull the rad plug, drain. Replace rad plug. Install adapter into heater hose, attach hose and filler neck spout. Turn on water, start engine, turn heat on full blast. Let run until the water coming out of the filler neck is clear. Shut off engine, remove hose and filler neck spout. Replace cap on hose adapter. Drain coolant system again. Fill back up with 50/50 antifreeze (or your preferred coolant ratio mix.

There's minimal amount of coolant flowing through rotary engines IIRC, so a block drain isn't totally necessary. Just compensate by adding a bit more straight anti-freeze.

 

ive drained the rad already of old crap and filled with water. i was told to turn the heater on and idle the car for a bit then shut off. drain and refill?


and farberio i meant that as warming the oil up so it comes out easier and drain and refill.

ive never done a coolant flush on an rx7 before.
I just wanted to know the correct process for it.

 

There is also a plug on the side of the radiator if it is a factory radiator. This plug needs to be removed and when you slowly add the coolant through the "fill cap" you do so until the coolant flows out of the drain at the top and to the side of the radiator and you then screw back in this plug. You then start the car up with the heater on and slowly add some more coolant until the coolant is close to overflowing where you are adding it to. Then screw the cap back on and cross your fingers. Also, when you're unscrewing either of the two plugs on the radiator it is best to use a regular head screwdriver as opposed to a Phillips head for in doing so it will strip out the plug and it is easy as pie to open the drain plug with the flat head screwdriver. Why people insist using a Phillips head is beyond me but we'll just leave it at that. You like pie, don't you?

 

....pie..

so once it starts coming out the side of the radiator i need to start the car with the heater on high and continue filling again?

do you guys recommend a specific coolant? 50/50?

 

Yes, to top it off and of course screw the side plug back in first and then start the car w/ heater on.

EDIT: And when adding coolant do it slowly and if that means taking a break and then adding more then do so. This helps to reduce the air bubbles in the system as when you pour the coolant in and stop, you will hear it gurgling.

 

kk. what coolant is best for rotary?

 

Forgot about that. 50/50 will be just fine.

EDIT: Remember, afterwards as the last thing to fill the overflow coolant tank to the full line!

 

:] ok. thanks for the help

 

Ah, I read oil as 'or' and thought you wanted to idle the car after draining the coolant. As if you wanted to use the idle to do a complete flush.

My bad.