how to replace the crossover gaskets on a 2001 ford f-150

Have you cleaned and changed the anti-freeze lately. Most individuals never think of draining the system and replacing it. When the engine and coolant is hot try this. Turn the temp control all the way to hot and place the fam on a medium temp. Feel the air with the palm of your hand as your palm cah sense temperature changes better than any other part of your body. Now slowly and in increments, turn the temp control toward cold/cool. See if you feel a temp change. If not you probably have a problem with the door mixing outside air (cool) with the air blown over the heater core.

You need to replace the intake manifold. You cannot replace the gasket in the crossover tube without removing the entire intake manifold. The manifold probably has a Crack in the plastic. I would buy an after market intake manifold it is a lot cheaper. I hope it helps.

Hello?????