Originally Posted by Gebo
Originally Posted by Trav
The reason for the short OCI were these were air cooled (both the VW and some of the Citroen models), they beat the hades out of the oil with heat and the oil in those days wasn't very good to begin with.
Citroen had a sweet little 4 cyl air boxer as well as the 2cyl found in the 2CV, I liked it a lot more than the VW air boxer.
Sweet...
Sure is, if you look closely you can see a lot of the technic that is still in use today by Subaru, Porsche also used a lot from Citroen for his ideas. A low profile OHC 4cyl boxer which unlike the VW didn't use pushrods and tubes. The front mounted fan provided the engine with more than adequate cooling.
These engines were longitudinally mounted up front and had FWD, in 1954 Citroen wanted a water boxer 6 for the DS, it did not make it into production but the concept was used many years later by both Porsche and Subaru.
This shows the cooling system of the air boxer, notice the upside down Perflux oil filter.
The DS 6cyl water boxer. Such a shame this didn't get updated to a DOHC with FI and used in the SM.