After driving for a little while, you turn into a parking lot, park your car, turn it off and get out. Then you hear the engine making clicking sounds. It only does it when it’s hot, does it have something to do with metals expanding when they’re hot or?
In: 414
I doubt that thermal contraction of the engine is causing the clicks. the car cools slowly after you turn off the engine. That thing is heat soaked and takes more than a few minutes to have appreciable thermal contraction.
I expect this to be electronic based, most likely a relay controlled by a thermostat, possibly the engine fan circuit. When thermostats get close to their specified temperature, they can ping pong on/off until they pass thru fully to either off or on. I suspect the clicking is the relay reacting to this ping pong effect.
Latest Answers