Knowing how to change your vehicle’s fuel filter is an invaluable skill to have, however not having the proper instruction could damage your car in the long run. Contaminants can enter your fuel system and if not trapped by the fuel filter, they can clog the injector inlet screens. If dirt reaches the injector itself, it can clog or damage the pintle valve and seat. In older cars, dirt can plug the carburetor’s fuel metering orifices.
Always check your service manual to see when you fuel filter needs replacement, but typically they should be replaced every 30,000 miles. However, professionals recommend a yearly fuel filter change as well as a change whenever other fuel system parts are replaced.
Our MVS forum members recently had a discussion on how to change the fuel filter on late 90s 850s, as well as tips and tricks to make the job even easier. MVS member Tsquared had this to say about changing out the fuel filter for a 1996 850:
“The gas filter is located passenger side just forward of the rear axle. The band that holds the gas filter in place is a pinch band that has a nut welded/formed into it on the back/top side. A 12 mm bolt holds the band in place. The top of the band has a bracket that hold the return fuel line – this just pops off and the return fuel line can be reattached once the filter has been replaced.
If your filter has never been replaced there is masking tape covering the pinch connections at both ends of the filter. Remove the masking tape. You need to put a pan under the old filter to catch any gas spillage – it will be minimal. Also the new filter comes with plastic caps on the ends of the new filter – you will want to use them to plug the old filter connectors so you need to take them off the new filter to have handy.
There is a T off the inlet gas line that has a cap on it – remove the cap and press the needle in the T to relieve any pressure that is on the gas line – If it has been setting for an hour there will probably be very little if any pressure on the line. You can skip messing with the T and you will see about an ounce of fuel that will come out of the filter when you remove the hose.”
MVS member turbotim2 added:
Another thing that may help is you can use the end of a box end wrench (I think a 17mm will work) to pry the hoses from the old filter nipples. It will pry on two sides of the hose fitting. I found it to work well.
To read more info, tips, and how-to’s on changing your Volvo’s fuel filter, check out these forum posts below!