I work for an engine distributor and am an active member of the AERA. I just installed a temperature tale tell under the hood, just above the KKM. It has about 5 little silver squares on this 1" x 1" sq sticker. The first sq. reads 180 degrees, and each square increases in 20 degree increments to 240.
When critical under hood temps are reached the tabs discolor (in this case they turn black) indicating a surpassed temperature.
Happy to say that without the hood liner, sitting in the sun, driving in traffic, and with the near 100 degree temperatures the 180 degree square is still silver. Glad to know that at least the air entering the intake is less than 180.
