Full Description

Purpose.

The low temperature coolant surge tank typically used on hybrid vehicles provides a pressurized reservoir for keeping the permanent coolant system pressure during the engine operation, coolant/air separation, coolant expansion and contraction, and a fill port for the assembly plant. Its design is critical to the operation of the powertrain cooling system as it must maintain a fully separated air/coolant system. The engineering test schedule contained within this specification defines the minimum performance and durability criteria necessary for design and production validation. In addition, the minimum requirements for in process testing of on-going production are outlined. The schedule is intended as a supplement to normal material inspections, dimensional checking and in process controls, and should in no way adversely influence adherence to other inspection operations.

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