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> Weber 40 IDF is dripping
malcolm2
post Feb 4 2024, 08:36 AM
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Nice day for a drive yesterday.... Drove some, filled up with gas and drove a bit more.



Woke up this morning to smell gas in the garage and noticed a pool of fuel on the floor.

I removed the air filter and see a drip in one barrel. 1 barrel is very wet and even has a pool sitting on one side of the plate. The others are wet, so they could be dripping, but less frequent. You know gas, it will evaporate pretty quick.

looks to be coming from the center of #14, Aux Venturi. I removed the Main Jet on that barrel (47 - 50), hoping to get it to stop dripping. I think it stopped.

What is causing this? (IMG:style_emoticons/default/WTF.gif)

I should add that Dual Carbs are new, set up at AC.net... now out of business. Last summer I fully adjusted, and sync'd them. Had been running really well, parked for about a month. Total of about 800 miles on the whole rebuild.

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malcolm2
post Mar 4 2024, 09:47 AM
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I finally had time and the temp was good in the garage, to work on this.

Got the floats re-set and new top plate gaskets.... coated with some chap-stick. Took a drive around the neighborhood and it ran great....

Re-check for drips and pools in the barrels and saw none. Rechecked this morning, so more than 12 hours and no drips.

Viton did the trick.
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Superhawk996
post Mar 5 2024, 10:44 AM
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QUOTE(malcolm2 @ Mar 4 2024, 11:47 AM) *


Viton did the trick.

(IMG:style_emoticons/default/smilie_pokal.gif)

Curious if these were Webers or are they EMPI knockoff?

I remember way back when I got my first IDFs for my original1.7L back in late 80s, they came with solid brass float needles. But subsequent rebuild kits always came with rubber tipped.

Somehow I thought Weber had probably migrated to rubber tips as original parts. Wondering if this is the case?

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Posts in this topic
malcolm2   Weber 40 IDF is dripping   Feb 4 2024, 08:36 AM
MikeK   Sounds like a cracked float allowing fuel past the...   Feb 4 2024, 09:35 AM
Robarabian   If the carbs are new, it may just be a stuck floa...   Feb 4 2024, 09:51 AM
malcolm2   I did pull the float on the worst side. I will re...   Feb 4 2024, 10:51 AM
Superhawk996   Here is the thing- fuel tank on a 914 is lower tha...   Feb 4 2024, 11:37 AM
malcolm2   apologies.... my 914 is L-Jet.... My Bus has the ...   Feb 4 2024, 12:53 PM
MikeK   Personally, I'd pull both carbs and set the fl...   Feb 4 2024, 02:06 PM
MikeK   weber float adj.   Feb 4 2024, 02:13 PM
malcolm2   help me out here.... you say the phenolic spacers ...   Feb 4 2024, 02:37 PM
malcolm2   Floats are reset to 10 and 32. Cleaned the top pl...   Feb 4 2024, 05:50 PM
Superhawk996   Got one suggestion to use a float valve with a r...   Feb 5 2024, 08:17 PM
gnomefabtech   How much gas is in the fuel tank? Check to make su...   Feb 4 2024, 06:09 PM
malcolm2   have not checked, but I did take the fill cap off ...   Feb 5 2024, 07:32 AM
VaccaRabite   Are you sure its not the two large lead plugs in t...   Feb 5 2024, 07:57 AM
malcolm2   what is a LEAD PLUG? To get the top plate off, I ...   Feb 5 2024, 08:38 AM
VaccaRabite   All IDF style carbs have 2 large prominent plugs (...   Feb 5 2024, 09:20 AM
MikeK   help me out here.... you say the phenolic spacers...   Feb 5 2024, 09:21 AM
MikeK   One last thing. The lead (led, not leed) plug is ...   Feb 5 2024, 09:27 AM
rhodyguy   The plugged holes are also for getting core cavity...   Feb 5 2024, 06:21 PM
malcolm2   I got screwed by the USPS. Pierce got the order, ...   Feb 23 2024, 02:04 PM
malcolm2   maybe the holes in the side of the valve body are ...   Feb 23 2024, 02:07 PM
malcolm2   I finally had time and the temp was good in the ga...   Mar 4 2024, 09:47 AM
Superhawk996   Viton did the trick. :trophy: Curious if the...   Mar 5 2024, 10:44 AM
stownsen914   Two questions: 1. What fuel pump are you using? It...   Mar 5 2024, 03:38 PM
malcolm2   Two questions: 1. What fuel pump are you using? I...   Mar 9 2024, 08:07 AM
malcolm2   [quote name='malcolm2' post='3132120' date='Mar 4...   Mar 9 2024, 08:01 AM
malcolm2   new question here tho..... anyone use a QFT press...   Mar 4 2024, 09:56 AM
porschetub   new question here tho..... anyone use a QFT pres...   Mar 4 2024, 03:28 PM
malcolm2   Just sitting all week at the last regulator settin...   Mar 9 2024, 08:10 AM
malcolm2   This issue is never ending...... I took the regul...   Apr 1 2024, 09:42 AM
Superhawk996   Post picture of where you have fuel pump mounted r...   Apr 1 2024, 05:18 PM
malcolm2   Had a similar thought. Run the hose, at least some...   Apr 1 2024, 09:37 PM
Superhawk996   Regardless, the damn viton tipped float valve s...   Apr 2 2024, 06:54 AM
malcolm2   i have some feelers out to see what the OEM L-JET ...   Apr 2 2024, 10:00 AM
Superhawk996   i have some feelers out to see what the OEM L-JET...   Apr 2 2024, 11:21 AM
flipb   i have some feelers out to see what the OEM L-JE...   Apr 2 2024, 01:20 PM
nditiz1   Carbs will always have a gas smell when left to si...   Apr 2 2024, 04:43 PM
malcolm2   Carbs will always have a gas smell when left to s...   Apr 2 2024, 06:39 PM
malcolm2   hose path today. yellow line comes out of the btm...   Apr 2 2024, 06:48 PM
Superhawk996   That’s a lot of hose (white path) Could do thi...   Apr 2 2024, 07:29 PM
malcolm2   I like your idea. found a few decent pictures of ...   Apr 2 2024, 08:19 PM
nditiz1   My feeling here is it's getting kind of crazy ...   Apr 3 2024, 07:13 AM
malcolm2   AC.net is out of business, but bought the new idf ...   Apr 3 2024, 08:01 AM
Superhawk996   Just a side note on gauge vs pressure. I wouldnâ...   Apr 3 2024, 08:21 AM
nditiz1   I do trust ACN as most of my carb knowledge came f...   Apr 3 2024, 08:57 AM
malcolm2   I do trust ACN as most of my carb knowledge came ...   Apr 4 2024, 01:38 PM
Superhawk996   Random thought: Is your tank vented properly? Pr...   Apr 3 2024, 09:59 AM
malcolm2   Random thought: Is your tank vented properly? P...   Apr 4 2024, 01:32 PM
Nogoodwithusernames   You sure those venting lines are clear and not plu...   Apr 5 2024, 09:57 AM


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