27-04-2021, 11:38 PM
The fiter is hollow fine gauze. The breather holes in the valve chest cover have been closed. The other interesting mod on this car is the radiator overflow bottle. Radiator cap is airtight and a pipe runs from the outlet of the overflow pipe to the bottom of a bottle in the firewall box. Overflow water is sucked back into the radiator as it cools. I suppose some pressuisisation occurs ?