[supra_chick_1987]

I have a 1987 automatic non turbo Supra...in pretty good condition. I've done a lot of work on it, but I'm stuck. Whenever i drive it hard (like on the freeway), then shut off the engine, I can hear it boiling. The temperature gauge says it's not overheated or even running hot, but you can hear it boiling. Upon recommendation by my mechanic, I've replaced the water pump, the thermostat, and the fan clutch. This seems to have corrected the problem of it overheating, but you can still hear it boiling. What should I do next? I've never run across this problem before!