Fuel tank sender unit ......**FOUND ONE!!!!**

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kidcrewbob
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Fuel tank sender unit ......**FOUND ONE!!!!**

Post by kidcrewbob » Mon Aug 31, 2020 12:17 pm

So after restricting return line from swirl pot, cleaning & setting up carb etc finally bit the bullet & seemingly managed to prove that there is a load of rust flakes (some pretty hefty) in the tank most probably causing my intermittant "uphill and down dale" stutters and fuel starvation - centrifugal force perhaps!!

Anyhow, in doing so I have fatally damaged the sender unit during removal and need a replacement - part no is 533919051 but question is where can I get one - anyone got one lying around? Will one off a Mk1 Golf do the job?

Ta!
Last edited by kidcrewbob on Wed Sep 02, 2020 2:59 pm, edited 1 time in total.



mark1gls
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Re: Fuel tank sender unit ......

Post by mark1gls » Tue Sep 01, 2020 10:50 pm

Mk1 golf cabriolet will fit a Mk2 Scirocco, Mk1 golf tin top with a smaller fuel tank use a bottom feed fuel tank so different set up.


Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
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kidcrewbob
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Re: Fuel tank sender unit ......

Post by kidcrewbob » Wed Sep 02, 2020 7:25 am

Thanks Mark - will help spread the net a bit for this elusive part!! I could kick myself although it seemed almost welded in it was that tight and had no choice other than to take a mallet to it....;(



kidcrewbob
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Re: Fuel tank sender unit ......**FOUND ONE!!!!**

Post by kidcrewbob » Wed Sep 02, 2020 3:00 pm

@Mark - I've managed to source one locally so no need for you to rumage aroud - thanks



WreckTangle
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Re: Fuel tank sender unit ......**FOUND ONE!!!!**

Post by WreckTangle » Wed Sep 02, 2020 10:11 pm

When I removed mine I used a pair of water pump pliers on end, adjusted to engage in opposite slots thus evening out the force on the thing. I think the German words Auf / Zu here mean open / closed. It has to turn anti-clockwise to release it. I wonder if sometimes people get confused and try to turn it the wrong way.

The type for the bottom feed fuel tanks with just the gauge float seem still to be readily available. If these are the same fit I wonder whether it might be possible to convert one by drilling holes for some 5/16” fuel tubing. Might be tricky to get a fuel-tight seal.



kidcrewbob
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Re: Fuel tank sender unit ......**FOUND ONE!!!!**

Post by kidcrewbob » Thu Sep 03, 2020 10:58 am

Thanks Wreck - I did try the stilsons as you describe and deffo twisted anti cw but seems whoever had been there before (and they had as I could see the gnarled plastic) may have sealed with a mastic of some sort as it was rock hard - had to resort to tapping with a hammer via the rubber end of the stilsons but in the end the very brittle plastic shattered & it was toast.

I'm gonna to be uber-cautious when refitting and will clean up the face of the hole and grease the o-ring a little to get a good fit. Then need to run down the fuel to the red and try & extract as much of the crap as I can whilst replacing the filler neck. Was going to replace the tank but can;t get one at the moment unless anyone knows where there are some - Heritage say "expected soon" but cant give a date as yet.



mark1gls
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Re: Fuel tank sender unit ......**FOUND ONE!!!!**

Post by mark1gls » Thu Sep 03, 2020 12:18 pm

I did see someone make a thick wooden cross with a cut out for the pipes etc and the 4 corners slotted into each cut out so when twisting it was working on all 4 slots.
I’ll see if I can find the image as my description is not the best :-D


Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
Mk1 88 Golf GTi cabriolet 1.8 DX. Daily drive.
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Eagle1
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Re: Fuel tank sender unit ......**FOUND ONE!!!!**

Post by Eagle1 » Fri Sep 04, 2020 9:36 pm

I used the handles of the water pump pliers and by gently pushing down at the same time as twisting slowly released the sender.



Roccoman
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Re: Fuel tank sender unit ......**FOUND ONE!!!!**

Post by Roccoman » Mon Sep 14, 2020 8:23 pm

kidcrewbob wrote:
Wed Sep 02, 2020 3:00 pm
@Mark - I've managed to source one locally so no need for you to rumage aroud - thanks
Well done on finding one, I managed to snap mine when removing it, it still works but luckily found one on eBay a couple of weeks ago, as they are like hens teeth! I managed to find a second hand fuel filler neck as well!
I found that the old extendable magnet gets rid of the flakes in the tank with out too much bother.....
Hope you have got it all working again now though 👍



kidcrewbob
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Re: Fuel tank sender unit ......**FOUND ONE!!!!**

Post by kidcrewbob » Wed Sep 16, 2020 10:34 am

Yeh I got lucky and only £30 too - anyhow, I've dismanteled the old fuel filler pipe ready to remove - what a mess - rusty as feck, holed quite a way down away from the neck and signs of much botchery & friggery with tape, gunk & underseal. Got a beautifully made replacement from Dreadnaught waiting to go on once I've drained the tank enough and fished out as much of the crud as I can. I have a new tank on the way and have a local specialist lined up to fit as dropping the beam is beyond me and my modest set-up! Hopefully all this will eliminate the annoying random splutter-fest that has dogged my enjoyment of the 'rocco. Here's hoping....!



WreckTangle
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Re: Fuel tank sender unit ......**FOUND ONE!!!!**

Post by WreckTangle » Wed Sep 16, 2020 11:32 pm

I have done all the things you describe - had the tank cleaned, fuel filler neck replaced, restricted the fuel return at the vapour separator. However, I have discovered that mine still splutters when the tank gets down to about half full. I’m working on restoring a Pierburg to replace my Weber carburettor. I’ve also contemplated fitting a fuel pressure regulator in place of the vapour separator; but I’m trying to restore the car to as close to stock as possible. Interested to hear your experiences as your project progresses.



kidcrewbob
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Re: Fuel tank sender unit ......**FOUND ONE!!!!**

Post by kidcrewbob » Thu Sep 17, 2020 12:03 pm

WreckTangle wrote:
Wed Sep 16, 2020 11:32 pm
I have done all the things you describe - had the tank cleaned, fuel filler neck replaced, restricted the fuel return at the vapour separator. However, I have discovered that mine still splutters when the tank gets down to about half full. I’m working on restoring a Pierburg to replace my Weber carburettor. I’ve also contemplated fitting a fuel pressure regulator in place of the vapour separator; but I’m trying to restore the car to as close to stock as possible. Interested to hear your experiences as your project progresses.
I'm on a very similar wavelength Wreck - will get the tank swapped out as the external seams seem life-limited and some crud will remain but if I still get problems then I have a FP reg I bought last week but will need a electric pump to go with it. As you say, I had wondered whether the Weber is not optimal for an auto and whether a Pieburg would be better but will wait an see - there's a Pieburg specialist at Bromyard VW who will swap recon carbs -

https://sites.google.com/site/pierburgc ... rburettors