Zenith 26VME Restoration

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Re: 181 FFC Rolling Resto

Postby Tight Yorkshireman » Sun May 15, 2011 8:16 pm

Decided to have a go at my spare 26 VME following on from tavistocks suggestions
Just look at the gap in the mating of the float chamber to the main body! That’s unbelievable So need to do several things but first things first.

26VMECarb150511 006.JPG
Gap through distortion
26VMECarb150511 006.JPG (50.62 KiB) Viewed 1277 times


Got myself a flat board its PVC but it’s on a flat old kitchen work top in my garage.

26VMECarb150511 002.JPG
My flat board
26VMECarb150511 002.JPG (55.64 KiB) Viewed 1277 times


Flatted the float chamber surface. The abrasive used is fine wet & dry

26VMECarb150511 001.JPG
Cleaning float chamber mating face
26VMECarb150511 001.JPG (76.43 KiB) Viewed 1277 times


26VMECarb150511 003.JPG
Float chamber mating face cleaned
26VMECarb150511 003.JPG (70.57 KiB) Viewed 1277 times


Then removed pegs from the upper main carb body to allow me to flat that off and more
See next batch coming up.

26VMECarb150511 009.JPG
Removing gasket loacting pegs with pliers
26VMECarb150511 009.JPG (69.88 KiB) Viewed 1277 times


Regards

John
John (Tight Yorkshireman)
First referred to as the Tight Yorkshireman in editions of the Clubs Spotlight: Autumn 1996 Page 40 and Autumn 1997 Page 15
Tight Yorkshireman
 
Posts: 4739
Joined: Wed Apr 29, 2009 10:03 pm
Location: Sheffield

Re: 181 FFC Rolling Resto

Postby Tight Yorkshireman » Sun May 15, 2011 8:28 pm

Any way the gap seen on the previous photos was after I had flatted off the surfaces you can see here to get a true assessment of the distortion to be tackled.

Removed the pegs as previous and now needle valve to allow the surface to be accessible without bits protruding.

26VMECarb150511 010.JPG
Removing float chamber needle valve
26VMECarb150511 010.JPG (72.64 KiB) Viewed 1274 times




26VMECarb150511 011.JPG
Float chamber needle valve removed
26VMECarb150511 011.JPG (72.76 KiB) Viewed 1274 times


Placed main carb body on my flat board and “rubbed” away keeping it flat on the fine wet and dry and flat board.

26VMECarb150511 012.JPG
Flatting off upper float chamber face on main body
26VMECarb150511 012.JPG (53.62 KiB) Viewed 1274 times


Can see the almost clean flat mating surface and it really shows the deviations when doing this.

26VMECarb150511 018.JPG
Float chamber upper face flatted off almost
26VMECarb150511 018.JPG (52.75 KiB) Viewed 1274 times



More to follow

John G
John (Tight Yorkshireman)
First referred to as the Tight Yorkshireman in editions of the Clubs Spotlight: Autumn 1996 Page 40 and Autumn 1997 Page 15
Tight Yorkshireman
 
Posts: 4739
Joined: Wed Apr 29, 2009 10:03 pm
Location: Sheffield

Re: 181 FFC Rolling Resto

Postby Tight Yorkshireman » Sun May 15, 2011 8:56 pm

I decided that carefully I would use a small file to remove the excess from the main carb body to reduce the enormous tapered gap. This I did with some care and step by step using the eye to a lighted background. I got to what I regarded near enough as this is a tricky operation and many members will think this is a no go area, but it is a spare and I am fairly confident as I do have a plan “B”
Next bit I made a smaller flat sheet/strip section to fit onto the emulsion block face of the float chamber. (The emulsion block is removed). The small flat strip then has a measured to fit length of emery paper which I clamped onto the flat strip with small “G” clamps which I bought a pack of three from a £1 shop. The pack of three are the “G” clamps by the way! Not the pack of three I used to ask my dad what were they and why did he get them every time we went to the barbers shop all those years ago
Anyway I then clamped the flat strip/emery to the float chamber body with my third clamp and keeping the float chamber faces flat together rubbed away. This was in an effort to straighten op and make a more match-able surface of float chamber to the main body of the carb around the emulsion block
I did this for a while and it is very arduous needing recovery periods. Had to stop due to commitments but will continue and its getting there. Took off the flatting device and it doesn’t look bad. I am reasonably confident at this stage but will reveal more later

Regards John
Attachments
26VMECarb150511 024.JPG
Flatting contraption
26VMECarb150511 024.JPG (84.8 KiB) Viewed 1272 times
26VMECarb150511 023.JPG
Flatting contraption
26VMECarb150511 023.JPG (88.64 KiB) Viewed 1272 times
26VMECarb150511 021.JPG
Flatting contraption
26VMECarb150511 021.JPG (92.15 KiB) Viewed 1272 times
26VMECarb150511 019.JPG
Flatting contraption
26VMECarb150511 019.JPG (95.8 KiB) Viewed 1272 times
John (Tight Yorkshireman)
First referred to as the Tight Yorkshireman in editions of the Clubs Spotlight: Autumn 1996 Page 40 and Autumn 1997 Page 15
Tight Yorkshireman
 
Posts: 4739
Joined: Wed Apr 29, 2009 10:03 pm
Location: Sheffield

Zenith 26VME Restoration

Postby AustinofEngland » Fri Apr 07, 2017 11:59 pm

Zenith as returned from the so called specialist...
Image
Had a look up close at the carburettor, found that it has suffered the usual body distortion.
Measuring the gap between the bottom of the float body to the main body on the emulsion tube side there is a 13 thou gap!
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Measuring the the gap between the body and the float chamber there is a 6 thou gap! This means we can establish that it would have leaked fuel and ran like a three legged dog before going anywhere near the engine.
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Picking up some tips from the forums the distortion looked quite minor compared with some I've seen, so I've decided to try and correct it by dressing down the float chamber top face to adjust out the distortion.
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Stripped out all the jets etc to a bare casting.
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I found highlighting the machined face with a marker pen would give a good guide as where the material was removed.
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After some trial and error offering the chamber up to the body and measuring with a feeler gauge the gaps started to close up.
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An initial trial with both gaskets fitted looked good but on one side there was still a 1 thou or so gap towards the top edge.
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This was a combination of dressing the actual main body which had a high spot at the bottom and
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years of undoing/tightening the two float chamber bolts. This had crushed the top edge of the body causing a small ring to foul the bolts, with this filled out it allowed movement closer to the main body and the gap closed up.
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It's worth noting that with the amount of material removed from the top side of the float chamber that the emulsion tube gasket does not sit flush and may need to be trimmed down, but in this case it was an advantage because the float chamber top gasket did not but up to the edge of the right angle of the main body. When assembled it formed a perfect overlap with the other gasket...
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The final thing I've noticed is that the two main jet access bungs have had fibre washers fitted that are too large. One has been cut down so they fit together, but it looks too close for comfort and just asking to leak fuel. Did they have fibre washers fitted originally or are they aluminium / copper ones?
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After fully reassembling the float chamber and bolting it all back together and finally no gaps anymore, patting myself on the back I found this in the cardboard box for storing the carburettor....
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:whistle: :whistle: :whistle:
AUSTIN[b]- you can depend on it![/b]
AustinofEngland
 
Posts: 124
Joined: Mon May 09, 2016 6:05 pm
Location: Burton upon Trent

Re: UOL 1957 A35 Restoration

Postby AustinofEngland » Sat Apr 08, 2017 10:19 pm

After a think the penny dropped and I remembered that there was a gasket kit amongst the spares.
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It's obviously old stock and one of the aluminium washers has a small amount of corrosion, this cleaned up to a reasonable standard.
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Now fitted and looking much better!

Interesting information sheet with the gasket kit that states the carburettor will be worn after 30,000 to 40,000 miles and should be replaced with a complete new carburettor to preserve performance and fuel economy!
AUSTIN[b]- you can depend on it![/b]
AustinofEngland
 
Posts: 124
Joined: Mon May 09, 2016 6:05 pm
Location: Burton upon Trent


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