Filter modification for Peugeot and Citroen
There is a hidden heat exchanger under the Peugeot fuel filter. This page details how to modify the filter housing to permanently heat the fuel using the heat exchanger. The heat exchanger uses engine coolant, typically 70-80°C, which is fully passed on to the fuel. There are also many points where air can leak in, and fixes for these are also detailed.
- Older Citreons
- Some Fiat Ducato vans
Note that the OEM system initially heats the fuel with the coolant, then when hot a stat bypasses the heat exchanger and delivers fuel straight to the filter.
Rotary-Motion has come up with a mod called the one pence "penny trick" - this blocks the fuel going to the filter and makes it all go down through the heat exchanger first, heating the oil constantly.
Summary of changes
Images and guide content courtesy of Rotary-Motion
Rotary-Motion 22:02, 7 December 2010 (UTC)