Like alot of 2nd generation RX-7 owners, my low coolant buzzer went off the other day. I filled the radiator, and tightened the hoses I could get at, but I still had a leak and it got worse as time went on. Strangely it only leaked when it was not running, and it was dripping profulsely off the rear of the engine near the crossmember..Since it was hard to tell where it was coming from, I brought it in for a pressure test. Turned out to be a 3/8" custom bended rubber hose towards the back of the engine, that required removal of the intake manifold to get at it. end result...$14.00 part ..$250.00 labor..