Date: Mon, 14 Aug 1995 19:03:10 -0800
From: email@example.com (Bob Anundson)
Changing the K75 Fuel Filter
This procedure is fairly simple and straight forward but is not mentioned in Clymers specifically so I thought I would pass on my experiences.
The first step is to remove the gas cap assembly. There are four screws holding on the assembly and once removed the assembly comes off quite easily. At this point I siphoned off the remaining gas into a portable tank and I recommend everyone do this if possible.
Inside the tank on the left center side the front half of the filter can be seen. A small piece of hose attaches the filter to the pipe carrying gas to the injectors ( the pipe is on the bottom of the tank). This hose is held into place on the pipe by a small clamp which can be loosen by a screw driver. After loosening clamp screw, the hose can be slid off the pipe and filter can be brought up through the tank opening.
The other end of the filter is attached to a hose that is attached to the fuel pump. Note the direction of the arrow on the filter is towards the end that attaches to the pipe going to the injectors (the first hose that was removed). The filter can be removed by loosening the bracket on the hose connects to the fuel pump and the small piece of hose on the other end is similarly removed. Be careful as the filter is full of gas which is best directed into the tank and not on it.
Reverse the process for installing the new filter.
BMW recommends to change the filter every 16,000 under normal conditions. I changed mine at 13,000. Last year I replaced two fuel pumps on cars because of clogged filters and it was real expensive ($700 for the two). Therefore I am willing to spend a little more and change the filters more often hoping in the long run it will be cheaper.
I kept the old filter as an emergency backup for the road. There are stations with bad gas out there and an extra filter could come in handy.
Bob Anundson, K75