Carbs Leaking Fuel

Paulaner

Paulaner

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Was under the hood topping off and checking fluid levels last weekend when I noticed what I believe is fuel leaking out of both Webers. No reason to believe that it is anything other than that based on appearance and smell.

Main question are:
1. how serious of a fire risk is this to have been driving approx once per week most of the winter. Don't know specifically how long this has been going on for.
2. Is a full rebuild in order?
 

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I'd clean them up well then tighten every carb body screw I could find then see if you can determine where the leaks are coming from. If both are weeping like that then usually new gaskets are in order.
 
The pictures seem to show seepage, that most likely happens when the fuel system is under pressure (engine or electric fuel pump if you have one on). There is dirt around the gaskets, which would seem to indicate that there is a long-term seepage.

I would think that you have a low risk of a garage fire, provided you don't have fresh pooling of fuel combined with an ignition source. Keep the fuel pressure off until you have the leaking seals replaced.

Probably a good time to also replace fuel hoses when you have the system apart.
 
You want this fuel hose only! From another post, I use this on all my BMWs and don’t forget the gas tank.

Fuel hoses are constructed from different layers. The one that I bought is labeled >FPM/ECO/AR/ECO< which means that it has four layers. They are from the inside to the outside:
  • FPM: Fluoroelastomer, a material that can handle fuels containing ethanol as well as bio-diesel, resistant to higher temperatures than NBR
  • ECO: Epichlorohydrin rubber
  • AR: Aramid protective braid
  • ECO: Epichlorohydrin rubber
Contitech makes BMW PN 13537563456, FPM marked, 8mm ID hose, which is available from RMEuropean.com for $23/meter
 
HB Chris said:
You want this fuel hose only! From another post, I use this on all my BMWs and don’t forget the gas tank.

Fuel hoses are constructed from different layers. The one that I bought is labeled >FPM/ECO/AR/ECO< which means that it has four layers. They are from the inside to the outside:
  • FPM: Fluoroelastomer, a material that can handle fuels containing ethanol as well as bio-diesel, resistant to higher temperatures than NBR
  • ECO: Epichlorohydrin rubber
  • AR: Aramid protective braid
  • ECO: Epichlorohydrin rubber
Contitech makes BMW PN 13537563456, FPM marked, 8mm ID hose, which is available from RMEuropean.com for $23/meter
Click to expand...
Great tip and appreciate the part #. Thank you. I might as well go all in at this point. Full carb rebuild and fuel line replacement. I have not touched either since I got the car 8 months ago apart from replacing the fuel filter.
Might try @Stevehose suggestion first to buy a little time if possible as I am about to rip into refreshing the diff, and other rear end bits.
 
HB Chris said:
You want this fuel hose only! From another post, I use this on all my BMWs and don’t forget the gas tank.

Fuel hoses are constructed from different layers. The one that I bought is labeled >FPM/ECO/AR/ECO< which means that it has four layers. They are from the inside to the outside:
  • FPM: Fluoroelastomer, a material that can handle fuels containing ethanol as well as bio-diesel, resistant to higher temperatures than NBR
  • ECO: Epichlorohydrin rubber
  • AR: Aramid protective braid
  • ECO: Epichlorohydrin rubber
Contitech makes BMW PN 13537563456, FPM marked, 8mm ID hose, which is available from RMEuropean.com for $23/meter
Click to expand...
that's what i bought ...
 
Be more dogmatic about risk of fire. Eliminate all known risk. The danger of gasoline is precisely its high volatility. You can smell it.
Is there a smoke/CO detector in the garage?

With a good flashlight you might discover the source of fresh leakage. Take a picture with your phone and zoom in.
Also, get some carb cleaner and brushes/rags to clean up those dirt accumulations.
 
Ah, good to know Oils is you! I have Webers, but have already been scoping out a few other items from your site.

Would you ever consider developing remakes of the door gaskets?
 
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