Flush Cap for Engine Cooling System

This cap is designed to flush the engine cooling system of a Ford F-150 with a V8 engine. When flushing through a tee in the heater hose, this directs the overflow from the coolant tank to the outside of the engine cmpartment.

It looks like this will probably fit all Fords with a V6 or V8 engine and coolant recovery tank. The cap may fit other vehicles too. It has a 50mm thread diameter and 2.5mm pitch. If a Dorman 54208 replacement pressure cap will fit your vehicle, then so will this.

This was printed in PLA with 1.5mm shell thickness and works well, even with a running engine. Though ABS may perform better with hot water, I haven't tried it.

To complete this you will need a 1/2 inch PVC elbow and about 18in of PVC pipe. You should be able to press fit the parts together without glue so you can disassemble it for storage.