I’m really getting frustrated with this problem so I’ll appreciate all the help I can get. I raced my ls auto one night. The next day a couple of the hoses under/near the intake manifold wear leaking. Found some other small hoses that were leaking at the clamps. I’ve replaced both rad hoses, almost all the small hoses, cap and thermo. The rad is a year old, and the system pressure checked. My problem is that after driving an hour or so I’ll notice that the resevior is empty and the rad about a pint low. I have no idea where the coolant is going, the oil looks normal and the engine runs fine. I did notice that the cooling fan wasn’t coming on by itself, but both fans do come on when I turn the a/c on. I drove about 200 miles with the a/c running and only lost maybe a cup of coolant from the resevior. I’m assuming somethings up with the fan not coming on without running a/c? Would that cause coolant to dissapear, but the engine to not overheat right away?
my bet is that you didn’t fill the cooling system all way and it’s taking it from the resevior