3200GT Fuel Filter replacement

[RossWA]

Hi Guys,
Some advice on replacing the fuel filter please.
Are there any special instructions or tools required to undo the connections to the fuel filter?
I can see at the top there is an inlet fitting that appears to be plastic? do I remove that first or just undo the fitting below that connects to the filter?
Thanks
Ross

 

[SteveM]

From memory you squeeze the plastic fitting and it just pops off. Leave brass fitting in filter. At other end undue nut nearest pipe but again leave brass fitting in filter. Shouldn’t be too much petrol leakage but worth putting rags below. You only need to loosen bracket not remove entirely and filter can then be slid out.
Once filter out you need to swap brass connectors onto new filter making sure you match flow and outlet arrows to old filter.
I put old filter in vice and spanner on filter hex shape and then used spanner to undo brass fittings. You will realise why this isn’t an instu job to remove and swap brass fittings
Good luck
Ps don’t forget to depressurise system using valves on each fuel rail.

 

[RossWA]

Thank's for the advice Steve,
I did not think about depressurizing the system first, that could have been a surprise I did not want!
Ross

 

[davy83]

What he said, and yes de-pressurise, I found out the hard way, doooh.

 

[madmanmart]

While you’re in the boot, check the fuel pumps over.

 

[Mott The Hoople]

I wish I'd asked first - got a puddle of petrol in the boot!
Steve.

 

[Tamariini]

While you’re in the boot, check the fuel pumps over.

Might be a stupid question, but how can this be done? Just by powering them up and see if they turn at all?

 

[williamsmix]

Just reading this old thread for advice as I'm about to replace my fuel filter. What is the best way to depressurise the fuel system before removing the filter? Do you just crack open one or both inlet couplings (3 on the diagram) on the fuel manifolds? And I guess it's a good idea to have a rag handy for any
overspill?

 

[davy83]

I think that's how I did it. not sure if there is a better way.

 

[SteveM]

I take off the cap on item 2 above and depress the pin - cloth below as suggested

 

[williamsmix]

I take off the cap on item 2 above and depress the pin - cloth below as suggested

Changed my filter this afternoon. I depressurised both fuel rails with the relief valves (2). I was surprised at how much fuel came out. Certainly worth having a very absorbent rag to hand! Found the fuel filter on the RH side of the boot. There are a couple of plastic studs either side of the boot light that have to be removed and then the carpet comes away quite easily from the top along with the carpet covering the battery. No need to pull the whole thing out, just pull down the RH corner. The fitting on the top of the fuel filter can be released by pressing the white button on it and pulling. You can only do this after undoing the bottom fitting (2 x 17mm spanner required) and then releasing the filter clamp so you can get at the top fitting (attached by a flexible petrol pipe). The filter is full of fuel at this point so have some rags handy as your bound to spill some, like I did! I put the old filter in a vise - using the top and bottom hex points - to remove and swap over the top and bottom fittings. The top one has a copper washer, the bottom one doesn't. A new washer didn't come with the filter so I just reused it and didn't get any leaks. It took 3 goes to get the car started, to recirculate fuel and get the pressure back up.