Difficulty
Moderate
Steps
7
Time Required
03:00:00 - 04:00:00
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User contributed
Introduction
Here is a tutorial on changing the injector seals on a Ford Focus II - 1.6 TDCi - DPF - 110hp - Saloon
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Remove the nut using a ratchet and a 10mm socket wrench.
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Pull up to remove the engine cover
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Unclip the fuel return pipes from the harness support
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Remove the 3 screws from the bracket and move it to provide access to the injectors
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Disconnect the flow meter from the injector using a flat screwdriver by levering the blockage
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Before starting the following steps, pinch the fuel return hose (before the 1st injector - the one furthest to the left): this will avoid having to re-prime the fuel circuit
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Remove the fuel return hose clip
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Extract the hose
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Loosen the high pressure line (purple arrow) while holding the lock nut (blue arrow)
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Using the wrench, remove the 2 nuts (1 in front and the other behind)
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Using a pair of pliers, rotate the injector on its axis of rotation and extract it.
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Remove the copper seal
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Place the plastic ring (not shown in the photo) under the metal flange
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Using a screwdriver, remove the circlip washer.
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Remove the flange
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Clean the injector using a wire brush
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Be careful not to touch the injection head (circled in red). You risk blocking the small injection holes.
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At this stage, ensure that no impurities enter the combustion chamber (at the bottom of the well)
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Shutters are available commercially
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Remove the spy seal
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Clean the well and seal groove using a circular wire brush or a scotch brite pad.
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Compare the dimensions of the seals before reassembly
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Install the spy seal starting with the inner lip
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Reposition the flange, circlip and ring on the injector
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Position the copper seal without touching the injection head
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Using a ruler, align the injector with the others
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Tighten the nuts on the flange with the torque wrench. Gradually tighten the 2 nuts one after the other
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Couple 16 N.m
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Tighten the high pressure line
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Couple 25 N.m
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Reassemble the fuel return hoses, clips, connectors, harness bracket and engine cover
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Not very difficult, you just need to be handy.
Be careful, you still have to be very careful when removing the injectors.
Not very difficult, you just need to be handy.
Be careful, you still have to be very careful when removing the injectors.
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4 other people completed this guide.
11 Comments
What happens if you drop a coin into the injector well? (In the pre-combustion chamber)
THANKS
There is clearly a risk of damage to the chamber or that it falls into the main chamber and therefore be careful with the piston and or valve. Depending on the mass of the foreign body, it can simply be evacuated, burned or cause damage. I still recommend trying to recover it either with a homemade vacuum cleaner to have a narrower tip or with a wire on which you have stuck a ball of very adhesive tape. In the same way, ensure that the ball is held well to prevent it from remaining at the bottom.
Good luck
Hello
I have a question
I was told that the injector seals at the bottom of the well remain stuck.
Do you have a technique to remove them if they are stuck?
and is it true that they can stick
Thank you in advance for your reply
Good morning,
This was not my case, the seals remained mounted on the injectors. If you have a leak, it is possible to have a slightly sticky mixture that holds the seal “stuck” but without keeping it blocked. The carbon, on the other hand, can be a little more annoying and sometimes be present. If this happens, I recommend a depth gauge (small hook to measure the thickness) and act with a sharp blow to “break” the carbon and unblock the seal. Be careful not to drop anything into the hole.
Good luck
