The coolant expansion tank is almost finished. Four aluminum spacers were welded to the side of tank to mount it to the fire wall. They provide a 1/4” gap between the firewall and the tank which mitigates the amount of heat transfer into the cockpit. Like everything else in the car, it’s a tight fit.
Once the tank was temporarily mounted, the bungs were positioned and welded. Like all of the other tanks, female bungs were used so that if a male thread gets damaged it can be easy replaced.
There are no mounting spacers on the bottom of the tank because the rear roll cage hoop has a tube in that location.
The connectors for the coolant level gauge have been added, but the company that I ordered the sight tube from is closed due to Covid. The large -10 fitting on the bottom connects to the electric water pump's inlet. The smaller -4 fitting connects to the top of the coolant swirl pot.
The two -4 fittings on the top right are for the radiator bleed and the engine steam vent.