Fitting a Fuel Filter in the Jaguar XK 140
It is possible to fit the “AC type” Fuel Filter of the later XK 150 (Jaguar code C13681) in a Jaguar XK 140 (FHC). This type of fuel filter can be ordered new but also found in used condition at car jumbles or on Ebay (and spare parts are also available). For the conversion the existing fuel pipes of the XK 140 have to be modified, but this can be done in a way that the original situation can be restored at all times. For my LHD XK 140 FHC I have placed the Filter on the valence panel above the RH Battery Box, close to the fuel pump pipe and the carburettors.
There are two alternative ways to make the connections from and to the fuel filter. Alternative 1 uses the Flexible Hose of the XK 150, but this limits the freedom to choose an optimal position for the fuel filter. Alternative 2 uses two new (but period) longer flexible fuel hoses.
The following parts are required for alternative 1:
- Petrol Filter C13681
- Flex hose + banjo C14492
- Banjo bolt UNF ½”-20
- Fibre Washer C784 (½”)
- Copper pipe 5/16”
- Male Union 9/16” UNEF-24
- Olive for 5/16” pipe
For alternative 2 the following parts are required:
As mentioned alternative 1 limits the freedom as the Flexible hose + banjo C14492 is only 255 mm long. There are longer fuel hoses (about 400 mm) available with a ½” Banjo at one end and a Female connector 9/16”-24 UNF at the other. Some of these braided fuel hoses are “Smiths Petro-Flex” branded. We need 2 of them. The existing Flex Hose C3689 is removed completely and the new (longer) flexible hose is installed instead and fitted with the banjo bolt C13705 to the inlet of the Filter. The second flexible hose is mounted with banjo bolt C13705 to the Outlet of the filter and connected to the existing Fuel Pipe C3810 which runs to the carburettors.
Replacement Filter elements
The original XK 150 fuel filter had a simple “sediment screen” Jaguar part number 7299. Later Jaguars had a paper element installed ( part number C28080). Some (cheap) elements are known to “dissolve” in petrol and create filter problems over time: buy a good filter to prevent this.