Author's note: In the Jan. '09 issue of HPP, the technical article "Keep a Cool Head" described installing Evans NPG coolant in a Pontiac engine, along with other modifications. Due to the varied ...

When I take my Triumph GT6 out, the coil overheats. I have changed the coil, ballast resistor, condenser and have had the points and the timing. Is it the alternator playing up intermittently?

When monitoring your cooling system, take the temperature reading at the point where the coolant is hottest; on most American V8s, this is at or near the thermostat housing. The big-block in our C10 ...