i need help i got a 93 rex and everytime i drive it for a couple or minutes and park it the overflow tank would leak coolant i was wonderin is this normal or wat? Do i need to replace the tank wit a new one? Thanks for any infor

 

How many miles are on the engine?? If it's been overheated it may have a bad engine seal. Basically during the power stroke, gasses escape through the engine seals and into the coolant system, blowing out all your fluid.
Guess this is kinda the worst case, but all the info I have. If this is the reason I may have a temporary fix, hard to explain and may not fit under the hood of an FD.

 

I had the same problem after doing lapping on a very hot day, the coolet started to drip and it continued to do so for a few days then I took it to a RE specialist and he told me some hose were melted and the seals have to be replaced labour intensive job. Expensive too.

 

whenever i take it out for a few miles and then park the car, my overflow tank would be leakin coolant out of the little hole i know its not suppose to be this much overflow unless my water pump is not workin?!?!?!? Could this be it? I would fill it up again and drive it for a couple more miles and park and it would do the same damna thing. Please help me stop this!!!!!!!!!!!!!!!!!!!!

 

I hate to be the one to tell you this, but if it is your o-ring, then you will need an angine rebuild. The problem is that engines will warp naturally during warmup and cooldown and this will eventually create a gap large enough for the hot gasses from the pwerstroke to cook the fragile rubber o-ring that separates the coolant from the cumbustion champer. When the o-ring is cooked through, then the exhaust gasses from the powerstroke will enter the coolant passages in the engine and you will get a lot of fluid in your overflow tank. If you have a stock temperature guage, DON'T LET THE NEEDLE GO MORE THAN HALFWAY. The stock temp guage is NON-LINEAR. Keep topping off your coolant and have a mechanic (one that knows the RX-7!) look at it ASAP.
Please tell us how many miles are on your engine.

 

well i got about 88k on the engine the car seem fine when i drive it performance and all the only problem is that the overflow tank leak whenever i park the damn car DAMN DAMN !!!!!!

 

I've been waiting to write this up to show what i've done with my GSL-SE.
It takes some mechanical ability, large soldering iron, and some copper pipe, but it works to keep the air out of your cooling system.
First, get an air release valve, it's used in home hot water systems to remove air, it's basically a float, when water drops it vents air out of the top of the valve. This vent will be run to your overflow tank.
A 3"diameter * 8" copper pipe, two end caps for it, and 2-elbows and straight pipe (the size of your existing radiator hose. Figure out what size will fit (if anything) in your FD. Essentially, make a resoivior to slow the fluid down enough so the air can escape out of it, two tubes of different lengths work well. One coming in rather high, and the exiting pipe like .75" from the bottom of the contraption. I've attached a few pics to help describe it. To buy the air vent... look up "701-C" on grainger.com, it's like $6.50. They sell smaller ones at home depot as well.
It's helped me put another 10k or so on my engine, no coolant probs, except now the engine has been eating just a little of it recently. But a temporary fix that works in any case.
I'm sure i'll get flak from people sayin I shouldn't build my car a heart, but it keeps it runnin until the frame gives out.

 

another pic

 

I'm impressed djs2571, but it looks like a PITA especially for someone who doesn't know what they are doing.
88K is within the rebuild threshhold of a rotary. If you have a manual transmission you can get an aftermarket radiator. Did you ever let your coolant temp get above the halfway mark? Did the heater warning buzzer ever come on while you've owned it? How long have you owned it (in miles and time)? How long has the this coolant overflowing been happening? Engines warp more when they overheat. Overheating is generally bad for any rotary, but plagues the FD (3rd gen rex).
You should really copy your first post in the 3rd gen section of the forum.

 

try:
1. cleaning out your radiator
2. replace AST cap with 1.3 bar
3. refill with non-silicate coolant
4. 50/50 ratio w/ distilled water

good luck!