Actually , using seafoam you do not want to get it to normal operating temp as sea foams boiling temp is low and will evaporate before it will work. You just need to have the car run for 2 minutes at idle from cold start. Then use seafoam by pouring it in the intake hose as all the vacuum hoses are after the throttle plate. I drilled a hole in my intake and use it for using seafoam at each oil change twice a year.