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Removing A4 carbs

Posted: Sat Nov 03, 2018 5:21 pm
Author: Andrew_s
Hi folks,

I'm going to remove the A4's carbs in the coming weeks as fuel has been leaking for a while which looks more like a dirty golden syrup under the float bowls - I think it's coming from perished O-rings in the drain screws but any common areas to look out for?

Anything to be aware of before I start?

Cheers
Andrew

Re: Removing A4 carbs

Posted: Sat Nov 03, 2018 5:57 pm
Author: warren3200gt
Just check the drain screw o rings before taking the carbs off. If it is leaking from the drain screws then taking the carbs off is a little excessive. Orange / golden syrup is evaporated modern fuel.
Short term fix if its o rings is a smear of silicon gasket goo around them before screwing back in. Leave over night to set before turning the tap on.

Re: Removing A4 carbs

Posted: Sat Nov 03, 2018 6:44 pm
Author: Andrew_s
Thanks, got the O-rings, but the carbs they're looking pretty grubby so a decent degrease will do them good - just wondered if there was anything to be mindful of when taking them off.

Re: Removing A4 carbs

Posted: Sat Nov 03, 2018 7:06 pm
Author: warren3200gt
Hardest bit is setting cables to the correct tension on re instalation which is eay to do. If your striping them down for a clean just ensure you keep the bits together for each carb.

Re: Removing A4 carbs

Posted: Thu Nov 08, 2018 1:41 am
Author: zededeee
Esso super premium unleaded petrol (97 + octane) does not contain ethanol, BP possibly not also. See their sites for more info. i tested the Esso fuel and no ethanol was there. Ethanol is what causes the problems on seals and sticky deposits. There is no legal requirement to add 5% ethanol to 97+ octane petrol.

Re: Removing A4 carbs

Posted: Thu Nov 08, 2018 8:53 am
Author: Ultim8pc
In my experience, if they exhibiting goop on the outside then it's worth taking them off and looking in the float bowls to see if they need a clean. Use new float bowl gaskets, I recommend the Keyster ones (and their rebuild kits) as they are not made form card and I have never seen any of them leak after fitting.
But while you have the carbs out I'd recommend checking them thoroughly and setting them up.
Give me a shout if you get stuck.

Re: Removing A4 carbs

Posted: Thu Nov 08, 2018 11:16 pm
Author: ddg900
Is it possible to remove all four float bowls with the carbs in-situ? just wondering because I have a slight leak from the bowl gasket on no.2 carb, and bowl screws in carb 3 could do with replacing with new ones - having to take the whole shebang out to get at/replace the one weepie gasket/four screws is maybe a task not worth doing until the carbs actually need a full strip n clean?

Re: Removing A4 carbs

Posted: Fri Nov 09, 2018 8:57 am
Author: PAULJAC47
Done it loads of times,a small right handle ratchet with a cross head,plus a mirror and a piece of rag to catch the juice...Paul j

Re: Removing A4 carbs

Posted: Fri Nov 09, 2018 10:20 pm
Author: ddg900
Thank you :) well, there's the next job ... :D

Re: Removing A4 carbs

Posted: Sat Nov 10, 2018 6:52 am
Author: Andrew_s
Thanks for tips and advice folks - Paul, useful tip about the float bowls!