Removing zenith carbs - any tips?

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MajorBenz
C Class
Posts: 49
Joined: Sun 21 Dec, 2014 7:10 pm
Model you own: w108
Region: Victoria
Location: Melbourne

Removing zenith carbs - any tips?

Post by MajorBenz » Mon 30 Apr, 2018 3:33 pm

Hi guys,

Got myself some rebuild kits and about to start overhauling my zeniths. First must pull them off the engine.Was going to start with the front carb (closest to radiator). Any tips on getting access to the nuts on the valve cover side? I've disconnected the linkages / fuel lines / electical wires. Got two nuts loose - but the ones on the valve cover side are pretty hard to get at. Will removing the valve cover help? Or do I need to remove the rear carb first to access the front one? Am hoping to at least avoid pulling the intake manifold....

Cheers,
Dan

1969 280s - M130 engine.
Silver 1969 280S - "Grace"

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Bartman4800
300 SLR
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Location: Perth WA

Re: Removing zenith carbs - any tips?

Post by Bartman4800 » Mon 30 Apr, 2018 4:02 pm

Buy a cheap 12 mm combination spanner.

Heat up with a torch and bend it.

I had to do that to get sufficient access on my finnie (which has the same setup)

This will give you access to the nuts on the foot plate.

No other items to be removed, other than the linkage.


Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

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MajorBenz
C Class
Posts: 49
Joined: Sun 21 Dec, 2014 7:10 pm
Model you own: w108
Region: Victoria
Location: Melbourne

Re: Removing zenith carbs - any tips?

Post by MajorBenz » Mon 30 Apr, 2018 6:42 pm

Bartman4800 wrote:
Mon 30 Apr, 2018 4:02 pm
Buy a cheap 12 mm combination spanner.

Heat up with a torch and bend it.

I had to do that to get sufficient access on my finnie (which has the same setup)

This will give you access to the nuts on the foot plate.

No other items to be removed, other than the linkage.


Bart
Hi Bart,
Thanks for reply - will give that a shot.
What would you recommend for cleaning the carbs? Would kerosene be ok? I use that to clean bicycle parts.
Cheers mate,
Dan
:)
Silver 1969 280S - "Grace"

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Bartman4800
300 SLR
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Re: Removing zenith carbs - any tips?

Post by Bartman4800 » Mon 30 Apr, 2018 8:01 pm

Vinegar, the cheapest you can find (Aldi or Home brand)

Submerge them overnight in a bucket filled with white vinegar, this will turn all varnish into slime and make your copper surfaces shiny. Does not attack the metal.

Then spray with carby cleaner to remove the slime from all surfaces.

Take the whole carby apart and clean all jets, passages etc. with compressed air and carby cleaner.

The home brand carb cleaner from soopercheep works good, the stuff from Repco does not...

Best to use nitrile gloves with the carb cleaner


Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

User avatar
MajorBenz
C Class
Posts: 49
Joined: Sun 21 Dec, 2014 7:10 pm
Model you own: w108
Region: Victoria
Location: Melbourne

Re: Removing zenith carbs - any tips?

Post by MajorBenz » Tue 01 May, 2018 10:15 am

Bartman4800 wrote:
Mon 30 Apr, 2018 8:01 pm
Vinegar, the cheapest you can find (Aldi or Home brand)

Submerge them overnight in a bucket filled with white vinegar, this will turn all varnish into slime and make your copper surfaces shiny. Does not attack the metal.

Then spray with carby cleaner to remove the slime from all surfaces.

Take the whole carby apart and clean all jets, passages etc. with compressed air and carby cleaner.

The home brand carb cleaner from soopercheep works good, the stuff from Repco does not...

Best to use nitrile gloves with the carb cleaner


Bart
Vinegar you say? Well blow me down!
Off to Aldi.
Thanks once again for your sage advice Bart!
Silver 1969 280S - "Grace"

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MajorBenz
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Posts: 49
Joined: Sun 21 Dec, 2014 7:10 pm
Model you own: w108
Region: Victoria
Location: Melbourne

Re: Removing zenith carbs - any tips?

Post by MajorBenz » Mon 07 May, 2018 12:35 pm

Bartman4800 wrote:
Mon 30 Apr, 2018 8:01 pm
Vinegar, the cheapest you can find (Aldi or Home brand)

Submerge them overnight in a bucket filled with white vinegar, this will turn all varnish into slime and make your copper surfaces shiny. Does not attack the metal.

Then spray with carby cleaner to remove the slime from all surfaces.

Take the whole carby apart and clean all jets, passages etc. with compressed air and carby cleaner.

The home brand carb cleaner from soopercheep works good, the stuff from Repco does not...

Best to use nitrile gloves with the carb cleaner


Bart
Hi Bart,
I got the front carb off! (After lots of swearing).
It is now sitting disassembled waiting for it's vinegar bath. I just have to get my hands on a compressor for the blowing out. Is there any chance I could get away with just using an aerosol "air duster" for this procedure? Apparently they're are at about 140 psi when full.
Or should I just bite the bullet and buy a compressor. The guy at my tool shop said I need at least 50L tank if I don't want the motor kicking in every 5 minutes..
Cheers,
Dan
Silver 1969 280S - "Grace"

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Bartman4800
300 SLR
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Joined: Fri 10 Oct, 2008 12:10 am
Model you own: w111
Location: Perth WA

Re: Removing zenith carbs - any tips?

Post by Bartman4800 » Mon 07 May, 2018 2:07 pm

You can use an air duster, for sure.

I have had a small 40 liter compressor from Bunnings for nearly 10 years now. Do everything with it, except for Spray Painting.

I expected it to die long ago, but it is just holding on...

So what if it kicks in every 5 minutes?


Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

merc-304
250s
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Location: North Coast NSW

Re: Removing zenith carbs - any tips?

Post by merc-304 » Mon 07 May, 2018 4:16 pm

Buy a cheap $10 duster from supacheap or wherever...after vinegar bath take your carby bits down your local servo ...disconnect there tyre gauge connect your new duster..blow out your carb orifices..reconnect there tyre inflator .....
Job done !
And your used vinegar is a fantasic weed killer.
380 SEC

CraigB
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Re: Removing zenith carbs - any tips?

Post by CraigB » Tue 08 May, 2018 9:04 am

Thanks for the vinegar tip Bart - I have 2 alfa webers that need cleaning after rotten '98'.... again. Will give that a try.

The other point with the Zenith is that i believe they can warp, so checking how flat the bases is good, and i assume you could reflatten by rubbing on a sheet of emery on glass..... others will know more. Also look for play in spindles that can wear and leak air - ie. not just seals can be a problem.
Craig Baulderstone
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