So I just bought a fuel filter and O2 sensor at the store($90 USD for the O2 sensor), and I wanted to know how difficult this job is. If you could rate it from 1-10, how difficult is it.

I've swapped the radiator on this car, tailgate pistons, truck bumper, swapped out window switches, swapped rotors/pads, and other stuff. This wasn't that difficult, but I haven't ventured into the fuel system region... How difficult is it? anyone done it before?

Any advice/help is appreciated.

Regards,
Spioana

 

I had to change my fuel filter a few weeks ago. Not that difficult. On a scale of 1 - 10 i would say that changing it would be a 3 or 4. The O2 sensor on the other hand is maybe a 5 or 6. To change those 2 things it took me about 30 - 45 min although i have a 93 Volvo 850 i don't know if it's any different with the other models.

 

When the car is off the ground, the access seems good.

Taking your time, I can not see it taking too long. Butset asideyourself a couple of hours just to make sure that you can check your work and all should be well.

Going to the shop for this is not worth the cash if you can do it yourself .


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The O2 sensor can be a real ***** just becauseit is so tight. You need to buy the crows foot O2 sensor tool from the auto parts store.If you PB Blaster the heck out of it the night before it will help. It is definitely do-able by a mortal man though.

The fuel filter is cake, release the pressure at the schrader valve on the intake first.

...Lee

 

+1 to all the above, especially the advice about the O2 sensor crows foot and PB blaster. I hope you got an OEM O2 sensor, Reading the forums over the years I have learned that 850s seem to prefer only OEM sensors.

Glenn

 

Hey Lee,

Is it better to pre-soak(reminds me of the laundry I need to do )with WD40(not on the clothes [sm=smiley36.gif])or something else to help break it free?

The shop that I use uses this green stuff they call Dragon P!ss which seems to work really quickly on some of the rustiest nuts and bolts. You can actually see this stuff creep into the tight space. I still can not get them to tell me exactly what it is but I have heard the refference before.

Is there some form of anti seize that can be used on the O2 sensor to help in the removal next time around?



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PB Blaster is MUCH better than WD40 for this sort of thing. WD40 is more of a lubricant than a penetrant.

And any good anti-seize compound should help in the future.

John

 

Both are very easy. +1 on getting the OEM O2 sensor. I think they run closer to $200.

 

The easiest way to relief fuel pressure is to have the engine running and pull the fuel pump fuse until the engine runs out of gas.