cymfc3s

id flush it and keep and eye on it. Its super rare to get oil mixed in the coolant. Both fluids are actually quite seperated, unlike a piston engine.

redturbo

Thanks for all the replies and advice ,i have not got around to flushing the system yet .I think i found the overheating problem though , it is my fan clutch .I thought it was alright i did those tests spin after hot and cold ,that i read here or some other site.then i found a link here on this site to some rx7 trouble shooting page site that said those tests are not that reliable. so i let my car overheat a little and i stuck a rolled up news paper in the fan it stopped wright away.so are there any aftermarket clutches that will bolt right on to the existing fan,i dont want to spend $190.00 for a mazda clutch .i dont want to take a chance on a used one since these cars are so old.

redturbo

when i had my thermastat changed i had the repair shop put in a bottle of water wetter that i had picked up from autozone.is it possible that the full bottle was to much, or it had some reaction with the coolant and that is what is floating around in my coolant system .

ColinRX7

No, the water wetter mixes with the water, it won't separate like oil will.