Weber IDF needle seats

[Lil Lulu]

Just changed oil after replacing main seal and drove for about 20 miles. Let her sit for about 24 hrs. When I checked the oil, shit, too much. Smell like fuel, yep. So I’m going to just replace the foam floats but I think I should pay attention to the needle seats as well. Other than just crap in them(unlikely, I have double filtration on the fuel) what would cause it/them to stick. I may just throw in the towel and kit them. I haven’t disassembled them yet.
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'65 Beetle "Lil' Lulu"- Ruby Red
1600 stock from '71 bus

'72 Deluxe - Niagara Blue w/pastelwiess Camper Special 2L dual 40 Webers 002

'74 Hightop Weekender "Dixie" 1800 34 Del singles

[scubaseas]

What kind of fuel pump do you have? If mechanical it could be the cause of your fuel in oil from a torn diaphram. More likely than your carb floats or needle & seats. If your carbs were flooding it would hydro lock on starting or at least be very hard to start. You would also have a ton of smoke on start up. White to grayish and may actually have fuel dripping out of the tail pipe.
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Al

08/1970 T2a Westphalia owned since 1980

ASE Master certification. 50 years pushing a wrench
Retired

[Lil Lulu]

I have electric fuel pump. Since I only drove it 20 miles, I didn’t notice any difference from before. It may have been some crap that became dislodged from the fuel hoses or something ahead of the filters. I’m gonna tear them down tomorrow.. they haven’t had kits for about 40,000 miles.
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'65 Beetle "Lil' Lulu"- Ruby Red
1600 stock from '71 bus

'72 Deluxe - Niagara Blue w/pastelwiess Camper Special 2L dual 40 Webers 002

'74 Hightop Weekender "Dixie" 1800 34 Del singles

[scubaseas]

It takes a fair amount of gas dripping into the intake manifold to get by the rings and make the oil smell like gas. Does your crankcase vent system work OK as in unplugged? If your floats or needle and seats are leaking you should be able to see it by looking down the venturi.

Is it tuned rich? Ever put a wide band on it?

[udidwht]

Could be a float issue. If the needles have the Viton tips they won't stick open or closed. The old needles (before Viton) used to wear until a groove formed causing them to leak/drip into the manifold/s.

Did you rebuild them when you put the engine together originally?
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1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires

[Lil Lulu]

The case is gaining fuel when not running. This is not a running issue. The case gained like a quart in 36 hrs. The carbs were rebuilt and set up by a reputable rebuilder. I never had any problem with fuel in the oil until now. I still don’t have them apart. Tomorrow.
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'65 Beetle "Lil' Lulu"- Ruby Red
1600 stock from '71 bus

'72 Deluxe - Niagara Blue w/pastelwiess Camper Special 2L dual 40 Webers 002

'74 Hightop Weekender "Dixie" 1800 34 Del singles

[Lil Lulu]

Some owners say replace the floats if they are over a year old.
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'65 Beetle "Lil' Lulu"- Ruby Red
1600 stock from '71 bus

'72 Deluxe - Niagara Blue w/pastelwiess Camper Special 2L dual 40 Webers 002

'74 Hightop Weekender "Dixie" 1800 34 Del singles

[Xevin]

Hey buddy, if you can’t find replacement parts near you, should you need. These guys were fast to get me a Redline rebuild kit. And they have individual parts as well. Plus you can actually talk with a knowledgeable person

https://www.pegasusautoracing.com/
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Keep on Busin'

[udidwht]

[obieoberstar]

Whie sorting out a set of new to me Italian Weber 40 IDF's, I inspected the floats and found some 'bubbles' in the original floats.

Kinda picked at the bubbles on the floats and had the outer black covering come off using my fingernail to expose the porous internal part of the float. I took out the float from the other carb knowing that both needed replacement after inspecting the first carb. After sitting on the bench for a few hours I picked at the float and found there to be fuel in the float.

Replacement Weber floats were sourced and installed.

[Lil Lulu]

I’m running a Fawcett electric pump (loud) and the Holley fuel pressure regulator set at 1.5#. My floats are the black foam/plastic ones. Thanks for the heads up X. udidwt, you have the closest setup to mine. Also the closest environmental conditions. I always appreciate your input.
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'65 Beetle "Lil' Lulu"- Ruby Red
1600 stock from '71 bus

'72 Deluxe - Niagara Blue w/pastelwiess Camper Special 2L dual 40 Webers 002

'74 Hightop Weekender "Dixie" 1800 34 Del singles

[Lil Lulu]

I figure that it has to be either a float or needle seat issue. Can’t figure any other way for that much fuel getting in the oil.
_________________
'65 Beetle "Lil' Lulu"- Ruby Red
1600 stock from '71 bus

'72 Deluxe - Niagara Blue w/pastelwiess Camper Special 2L dual 40 Webers 002

'74 Hightop Weekender "Dixie" 1800 34 Del singles

[SGKent]

[Lil Lulu]

I have had these carbs for 7 years and the floats are the ones they cam with.
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'65 Beetle "Lil' Lulu"- Ruby Red
1600 stock from '71 bus

'72 Deluxe - Niagara Blue w/pastelwiess Camper Special 2L dual 40 Webers 002

'74 Hightop Weekender "Dixie" 1800 34 Del singles

[Xevin]

Are your floats really foam or plastic? If plastic shake them and listen for gas in them. Also submerge in hot water to check for air bubbles. Some say hot water. Some say warm water.
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Keep on Busin'

[udidwht]

The best way to check them is with the carb off and top taken off. Fill the bowl half way or so with fuel and sit the floats (once removed from tops) in the chamber carefully and wait and see. Have a brown grocery bag sitting underneath that will help in determining fuel issue.

Once the 40's are dialed in you should be netting 20 or so mpg highway and 16 city if you're foot is conservative. If you ever make it up my way shoot me a PM. I have an LM-2. Just be sure you have a bung in place.



idles - 47.5 - 50
main jet - 125
air corr. - 180
28mm vents
Float height 10.5mm (needle NOT depressed gasket in place)
Float drop 28-32mm
Fuel pressure no more than 4psi max (pref. 3-3..5psi) be sure the regulator is function correctly.

Bung placement (no the old oil spots aren't from me)

_________________
1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires

[udidwht]

[Xevin]

[udidwht]

[Xevin]

Udidwht, since your on a roll here with hot tips. How about a good technique for setting float height. I spend what seems like a ridiculous amount of time adjusting those little buggers.
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Keep on Busin'