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Technical Fuel Filter Replacement

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Technical Fuel Filter Replacement

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october_rusticle

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Hi again, i have a question i would never have thought i would be asking...but it seems the process is a lot different than the Fiorino...

How do i change the filter on a Doblo? Not only does it appear that there is 3 inputs into the filter, but i've heard reports that i have to remove fuel pump fuses and fill the new filter with diesel to avoid knackering injectors?? :eek:

Can't i just undo the 3 inputs and replace the filter as "normal" or do i have to relieve pressure here and remove relays there? :confused:

I seriously miss the simplicity of the Fiorino! Please help! lol
 
i changed mine on my 05 1.9jtd, by undoing the filter mounting assembly by removing bolts to the bulkhead remove the engine cover to make access easier and put plenty of rags and a tub underneath and unscrew but its a bit messy. as for refilling just turned the ign on and the fuel pump filled it back up and started first time no worries!,

maybe i have done it wrong but i had never heard of the fuse removal process so i eagerly await ppls opinions on this, but i doubt that fiat do that when they change them! there small spotty boy isnt gonna be bothered i bet!, i wouldnt fancy filling the filter up before fitting as its tricky to get in place i think you would end up spilling most of the fresh diesel gettin it in place but im prepared to be corrected!!!
 
Thanks for that! I wonder if mine is different somehow because there appears to be 3 seperate bits going into the filter rather than a simple unscrew operation you describe and was on the Fiorino.

I'm gonna have to do it either way, it's getting worse on fuel so i'm becoming convinced the filter is shovelled!
 
october_rusticle said:
Thanks for that! I wonder if mine is different somehow because there appears to be 3 seperate bits going into the filter rather than a simple unscrew operation you describe and was on the Fiorino.

I'm gonna have to do it either way, it's getting worse on fuel so i'm becoming convinced the filter is shovelled!
Click to expand...


mine has 3 connections on the top if i remeber rightly but the fuel filter screws on undernaeath like an oil filter will grab a look and take a pic later!
 
Ah, that actually gives me a bit more confidence if yours had 3 inputs too.

A picture would be gratefully recieved if you get chance :D

Amusingly for most, this is my first "modern" vehicle and i am PARANOID about wrecking it by working on it haha. Everything on the Fiorino (can't let it die, sorry haha) was simple and straight forward. Seems though the most simplest of tasks on newer vans could end in thousands of pounds worth of tears!

Dealers can't cry poverty and hard times, fair enough sales may have slowed but £68+VAT per hour just for them to tell you what's wrong with it is a laugh!
 
heres the picture of mine,

easy enough to remove just a little messy!!, if you use UNIPART for the filter the exact fit filter is GFE 5385

all you need to do is unscrew the sensor assembly from the bottom of the old filter and put into the new one and screw back on job done!

hope this helps
 

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The 3 pipes on top of the filter are: one inlet to supply fuel from the lift pump in the tank, one outlet to supply fuel to the injection pump on the engine and one return pipe that returns excess fuel to the tank. Circulating fuel back to the tank also has the effect of cooling it for greater efficiency.

You don't need to remove any fuses. That was just to relieve the pressure in some constant high pressure fuel systems.

The cleanest way to change the filter is to take the whole filter assembly off the car. Remove the 3 pipes and hang them up so they don't leak. Don't try blocking the pipes as the seals inside them are quite delicate. Next, loosen the filter element about half a turn (makes it easier to remove it later) then take off the 2 nuts holding the housing to the bulkhead and remove the complete filter assembly. You will need to disconnect the water indicator wiring plug (if fitted) from the bottom of the filter and the heater wiring plug (if fitted) from the side of the filter on the way out. You can then hold the whole thing over a bucket to replace the filter element without leaking fuel over the floor or your engine.

You don't need to fill it with fuel before replacing it. After fitting it back on the car, turn the ignition on and off a few times for about 10 seconds each time to prime the system before starting the engine.

Dave.
 
Davren said:
The 3 pipes on top of the filter are: one inlet to supply fuel from the lift pump in the tank, one outlet to supply fuel to the injection pump on the engine and one return pipe that returns excess fuel to the tank. Circulating fuel back to the tank also has the effect of cooling it for greater efficiency.

You don't need to remove any fuses. That was just to relieve the pressure in some constant high pressure fuel systems.

The cleanest way to change the filter is to take the whole filter assembly off the car. Remove the 3 pipes and hang them up so they don't leak. Don't try blocking the pipes as the seals inside them are quite delicate. Next, loosen the filter element about half a turn (makes it easier to remove it later) then take off the 2 nuts holding the housing to the bulkhead and remove the complete filter assembly. You will need to disconnect the water indicator wiring plug (if fitted) from the bottom of the filter and the heater wiring plug (if fitted) from the side of the filter on the way out. You can then hold the whole thing over a bucket to replace the filter element without leaking fuel over the floor or your engine.

You don't need to fill it with fuel before replacing it. After fitting it back on the car, turn the ignition on and off a few times for about 10 seconds each time to prime the system before starting the engine.

Dave.
Click to expand...

why bother removing the 3 pipes in the first place? especially if the seals are easily damaged?? the main mess when i did mine was spillage as you undid the filter and not diesel coming thru the pipes themselves!, but if u have some rags stuffed in the engine bay and a plastic tub its easy enough!,
 
Last edited:
derbydoblo said:
why bother removing the 3 pipes in the first place? especially if the seals are easily damaged?? the main mess when i did mine was spillage as you undid the filter and not diesel coming thru the pipes themselves!, but if u have some rags stuffed in the engine bay and a plastic tub its easy enough!,
Click to expand...

The seals are not damaged by removing and refitting them to the filter head but could be damaged if something was shoved in them that wasn't designed to be there.

Removing the 3 pipes enables you to get the complete filter assembly out of the car. You can then undo the filter over a bucket away from the car and contain the spillage as you remove the filter element.

If rags stuffed in the engine bay works for you then fine, I find it easier and cleaner to remove the whole thing.

Dave.
 
derbydoblo said:
why bother removing the 3 pipes in the first place? especially if the seals are easily damaged?? the main mess when i did mine was spillage as you undid the filter and not diesel coming thru the pipes themselves!, but if u have some rags stuffed in the engine bay and a plastic tub its easy enough!,
Click to expand...

The seals are not damaged by removing and refitting them to the filter head but could be damaged if something was shoved in them that wasn't designed to be there.

Removing the 3 pipes enables you to get the complete filter assembly out of the car. You can then undo the filter over a bucket away from the car and contain the spillage as you remove the filter element.

If rags stuffed in the engine bay works for you then fine, I find it easier and cleaner to remove the whole thing.

Dave.
 
fair point we all do things differently :)

its always nice to get another method and opinion on things!

im very grass roots!, if i can manage without undoing too much in the way of pipework, i will do my best!

the reasoning to my technique is i wouldnt like to replace one of those pipes if it got damaged! goes without saying the local fiat parts dept wud have my ass for grass!!
 
actually it dependent of your fiat doblo engine

if the vehicle is a mjet 1.9, the pipe need to be removed.

if it's a 1.9 jtd, like the picture derbydoblo posted.
the removal will be just removing the fuel filter

as there was change of design for the fuel filter.. for mjet,
 
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