Or do I just need to get a new one? That seems to be the case. After a test drive the other night, it was spewing coolant out the "seal" between top and bottom sections.

Any idea of the cost for a new one?

Thanks - Tom

 

go to www.rx7store.net and get an aluminum one there about 149- 169 dollars

 

http://www.rx7store.net/index.asp?Pa...S&Category=353

Replace it please. That is where they fail and take out engines. Elimination will let you never worry about it again. But some will argue that is a bad idea. I have had mine out for 3 years and NO problems.( cooling wise)

But if you live by the code of the Mazda engineers were the smartest people around, then replace it with one of the above attached tanks.

 

Thanks for the input. It sounds like a common failure, and it's just a matter of time before it goes. I guess if you remove it, you just attach the input hose to the output with some sort of coupler I assume?

 

do a search for the removal.. but at quick overview is: You'll need the cap assembly from an 86' rx7 so you have the overflow nipple to attach to the Overflow resevoir.

Then cap the other nipples with some heater hose and a bolt clamped into the end. Connecting the 2 nipples together will cause a localized hot spot of coolant.

If you went the extra mile like I am doing when the new engine shows up, you can cut off, drill and tap the holes where the nipples used to be,.. and install NPT plugs for a cleaner look. ( Better than hose's with bolts, but more involved in doing it correctly. gotta watch those metal shavings)

 

i'll second the removal suggestion.

 

If you connect the input and output hoses you need to put a restrictor or plug in the hose. Otherwise you'll have a fair amount of coolant that bypasses the radiator.