The rad in my Rx-2 seems to warm up on one side only (the side of the hoses).
Is there a thermostat inside the radiator ?
I have only just installed the new Rx-7 12a and I had it running for about an hour in the driveway yesterday but the drivers side of the rad was still cold.

I could keep my hand on the fins in the rad everywhere but I could barely touch the oil cooler.

Another question: the original temp sensor in the Rx-2 is a one wire type while the one I have in the engine now is the two wire type (Rx-7).
How can I hook that up ?

Thanks !

 

I think the old rx's had what is called a crossflow radiator and they had some sort of baffle plate in the middle of the end tank to seperate the inlet/outlet.
It sounds like the plate has shifted in yours.I would take the radiator to a repair shop and have it checked out make sure they remove the tanks instead of just flow checking it. If the plate is missing or shifted it will flow straight through the tank but not the core which sounds like what its doing now.

BTW...don't drive the car or run it very long in your driveway it will overheat since the radiator isn't working to cool the engine.

 

i second that. those rads with the tanks on each side rather than top and bottom, have a plate soldered inside the tank to allow coolant to flow thru the core of the rad because the inlet and outlet hoses r connected to the same tank. the solder in urs has probably deteriorated to a point that it has broken loose and coolant is just flowing around in that one tank. that tank would have to come off to fix it. take it to a repair shop.