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seeping shaft - solex 34 - kombi carbs

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BrisDubba Fahrvergnugen

877 posts · joined Oct 2005 ·

#919652
After rekitting the solex 34's in my 75 bay - the right carb is seeping fuel through the shaft (well that what is seems to be anyhow)



I believe they are able to be rebushed/ rebuilt - anyone done this before - any suggestions.

Cheers

Peter
VW Toys

64 Beetle - club car - Herbie
RSK 718 Porsche Spyder
76 Southern Cross Offroad racing buggy. "Manx Buggies"
77 Cobra Offroad racing buggy "RipOff"
68 Country Buggy KO200
64 Manx swb
70 Dual Cab kombi
74 Dual Cab kombi
74 Micro bus

silver Dangerous when poked

2,169 posts · joined Dec 2002 ·

#919659
This tends to happen when the float levels are set wrong I would check them first
Keeping it real !

68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 ·

#919697
BrisDubba wrote:After rekitting the solex 34's in my 75 bay - the right carb is seeping fuel through the shaft (well that what is seems to be anyhow)



I believe they are able to be rebushed/ rebuilt - anyone done this before - any suggestions.

Cheers

Peter
Hi Peter

to get them rebushed the hole is drilled larger then a bush is fitted.

Carburetor specialists would do this..

sounds like the fuel is running over the shaft/flap and out the shaft...

so, maybe the needle and seat aren't working when the bowl is full of fuel..

or too much fuel pressure from Your pump...
only need a couple of PSI.. [2psi]

Your pump may need shimming to lower the pump pressure..
if its an original vw pump

LEE

I have always oiled All moving parts on a carburetor
[just like VW mechanics did back in the 50s and 60s..]
this will help stop most wear...
LEE
- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#919707
give VVDS a call 02-9789-1777 as they have them rebushed and refurbished to make all new

there are a few different versions so you may have to remove and take some pics or remove and send down for corrrect supply of the throttle plates

they usually have several sets of the different versions in stock
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

BrisDubba Fahrvergnugen

877 posts · joined Oct 2005 ·

#919741
Just when I thought the problem might be solved with Lee's suggestion about the fuel pressure. The dial was set to 3.5 so I wound it back to 2 and no obvious weeping..



I ran it at idle for 10minutes or so without seepage and then as soon as I turned it off the motor the seepage began....😠

I will change the needle and seat over and see if that changes anything. I didnt change them over as the ones in the kit looked pretty poor quality compared to the originals.

Cheers

Peter
VW Toys

64 Beetle - club car - Herbie
RSK 718 Porsche Spyder
76 Southern Cross Offroad racing buggy. "Manx Buggies"
77 Cobra Offroad racing buggy "RipOff"
68 Country Buggy KO200
64 Manx swb
70 Dual Cab kombi
74 Dual Cab kombi
74 Micro bus

silver Dangerous when poked

2,169 posts · joined Dec 2002 ·

#919742
BrisDubba wrote:Just when I thought the problem might be solved with Lee's suggestion about the fuel pressure. The dial was set to 3.5 so I wound it back to 2 and no obvious weeping..



I ran it at idle for 10minutes or so without seepage and then as soon as I turned it off the motor the seepage began....😠


I will change the needle and seat over and see if that changes anything. I didnt change them over as the ones in the kit looked pretty poor quality compared to the originals.

Cheers

Peter
try adjusting the height of the needle and seat with another fibre washer rather than replacing it. I had the same problem and it was this adjustment that fixed it
Keeping it real !

BrisDubba Fahrvergnugen

877 posts · joined Oct 2005 ·

#919745
Cheers Silver, I did as you suggested and put another washer under there (either I misplaced the nylon ones or my kit had them as brass - either way I didnt have any nylon ones)

I ran it like before and it isnt seeping upon shut down, so hopefully that will have solved it.

I rang about the rebushing and it is $65per carb for the throttle plate, which was fine but I would have had to send down to them and then they send one up - so for the moment this has worked out okay, but will keep it in mind if the issue persists.

Thanks all (now onto my next item on the to-do list)

I have a week to get it on the road as I want to cruise along to action day (it is my daughters 3rd birthday so wont be able to stay long)

Peter
VW Toys

64 Beetle - club car - Herbie
RSK 718 Porsche Spyder
76 Southern Cross Offroad racing buggy. "Manx Buggies"
77 Cobra Offroad racing buggy "RipOff"
68 Country Buggy KO200
64 Manx swb
70 Dual Cab kombi
74 Dual Cab kombi
74 Micro bus

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#919746
Definately float level related, rebush is for sealing air out, your fuel leaking is due to high float level or seeping needle/seat. When you turn off the engine, the residual fuel pressure actually rises due to the stationary fuel at the pump and in the fuel lines heating up and therefore expanding putting further load on the needle/seat. If it's not up to the task, it lets the fuel into the carb, which is also increasing in temp and the excess fuel goes down the throat of the carb.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#919755
an easy way to find if the throttle bushes are worn and leaking is when the engine is running get a length of rubber tube
one end in your ear and use the othe end around the throttle shafts
if there buggared you will hear them sucking air very easy time to replace
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409