Pulse and Glide with an auto

[psyshack]

P&G should not effect coolent temps if at all. There might me some smallish spikes here and there.

With a sealed or semi sealed cooling system thermal dynamics force the bulk of the collent around and in the cooling system. Water pumps mainly circ. the cabin hot water loop. This is not to say they dont help with the flow of water to and from the rad. and block.

If a car is showing signs of over heating while P&Ging. I would check the thermostat and rad. cap. And if that ok and your still seeing alot of temp spikes or over heating action a good flush might be needed for the block, head and rad. I would do a flush very gental like. Getting dirt out of the system is hard on the water pump seal.