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When my 67 coupe heats up I get a whistle noise coming from the motor. I used an auto stethoscope and the only place that sounds different and where I can hear the whistle is at the carb. I checked all the hoses and do not see any air leaks. Could it be something internal in the carb? I have a Holley 4-barrel.
any possible way to take a vid of it whistling? only thing that i can think of whistling would be the vac advance but i dont think it has enough pressure to actually make a whistle sound
Get a can of carb cleaner and spray it at the base of the carb, if the RPM's pick up you have a leak. If its not the carb to the intake one of your vac hoses is cracked or leaking i would think.