Most factory-installed surge tanks are not built to last. A majority are made from a plastic that is just not that durable. At Southpointe Radiator, we sell aluminum fabricated surge tanks that have a lifetime warranty on any cracking or welds.
The Surge Tank is an integral part of a trucks cooling system. The main function of a surge tank is to control the pressure variations caused by changes in temperature. They prevent system failure by controlling the rise and fall in pressure in the cooling system. Usually, a radiator is topped with a surge tank to prevent the blowing out of radiator fluid.