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Old 05-01-2019   #1
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Post Fuel filler cap lock barrel, remove and swap out

Hi,

The lanyard snapped on the FIAT 500 fuel filler cap and not finding a replacement lanyard I wanted to replace the old cap with a new fuel filler cap with complete lanyard.

The new fuel filler cap comes with a hole for a lock barrel. I wanted to keep the same lock so the ignition keys would lock and unlock the fuel filler cap.

There was very limited information on removing and swapping over the lock barrel on the fuel filler cap on the FIAT (FIAT 500). Using the available information found off the Net I worked out how take apart the fuel filler cap remove the lock barrel and place it into the new fuel filler cap.

Below is the step by step process of the operation, attached are photos of the steps,

1 & 2 removal of the rubber seal
3 prise off the black plastic cap with a flat blade screwdriver
4 lift off black plastic cap
5 break off black plastic tag holding metal U clip.
6 remove metal U clip with flat blade screw driver
7 lift off the white plastic lock/cap
8 push through the barrel of the exposed lock

Insert the barrel into the new cap and using the key align and push the barrel into the correct position where it locks and unlocks properly.

Good luck...
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Old 05-01-2019   #2
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Quote Originally Posted by pilier1 View Post
Hi,

The lanyard snapped on the FIAT 500 fuel filler cap and not finding a replacement lanyard I wanted to replace the old cap with a new fuel filler cap with complete lanyard.

The new fuel filler cap comes with a hole for a lock barrel. I wanted to keep the same lock so the ignition keys would lock and unlock the fuel filler cap.

There was very limited information on removing and swapping over the lock barrel on the fuel filler cap on the FIAT (FIAT 500). Using the available information found off the Net I worked out how take apart the fuel filler cap remove the lock barrel and place it into the new fuel filler cap.

Below is the step by step process of the operation, attached are photos of the steps,

1 & 2 removal of the rubber seal
3 prise off the black plastic cap with a flat blade screwdriver
4 lift off black plastic cap
5 break off black plastic tag holding metal U clip.
6 remove metal U clip with flat blade screw driver
7 lift off the white plastic lock/cap
8 push through the barrel of the exposed lock

Insert the barrel into the new cap and using the key align and push the barrel into the correct position where it locks and unlocks properly.

Good luck...
Excellent..!!

I was anticipating a
'How do I '... and it is something I have not seen or done.

So top job..!!

Cheers. Charlie
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Old 05-01-2019   #3
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The lanyard snaps usually due to people letting the cap and "bunch" of keys hang down scratching the bodywork rather than hanging the cap from the hook on the inside of the fuel filler cover?
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Old 05-01-2019   #4
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Re: Fuel filler cap lock barrel, remove and swap out

Cheers for that. Iíve got two or three of these laying around, not knowing what to do with them.
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Old 06-01-2019   #5
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Quote Originally Posted by John202020 View Post
The lanyard snaps usually due to people letting the cap and "bunch" of keys hang down scratching the bodywork rather than hanging the cap from the hook on the inside of the fuel filler cover?
Time also takes its toll. Iíve always hung mine on the hook and the rubber is cracked and will soon break.
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Old 08-01-2019   #6
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Re: Fuel filler cap lock barrel, remove and swap out

Quote Originally Posted by 306maxi View Post
Time also takes its toll. I’ve always hung mine on the hook and the rubber is cracked and will soon break.
True, and it also twists itself up as you tighten the cap, then gets shut in the fuel flap.

Our last 500 was developing a maddening fault where the cap would not ‘freewheel’ when locked. As in, you’d hold the cap and twist the key clockwise, then remove the key as always done in the past, but the cap would ‘catch’ and unscrew even when locked - and then, couldn’t be screwed back on again without using the key to unlock (engage) it. Can’t leave the cap unlocked either as the key can’t be taken out with the cap unlocked. I tried dousing it in silicone spray etc. but no change, I think some plastic ring had snapped/snagged inside.

So, had we kept the car, I would have found the above guide very useful to transfer the lock into another cap

-Alex
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Last edited by alexGS; 08-01-2019 at 11:46.
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