I installed my weber 36/32 on my 82 22r a few months ago. I worked flawlessly until a few days ago. I smelled gas after coming home and shutting the truck off. Yep it was leaking, damn it. I did a few test to see how/when it was leaking. I started the truck up the next day no leaks, drove it a few miles checked it, no leaks. I continued my drive about 20 miles or so, checked again, no leaks. Shut the truck off, mowed a lawn, check it no leaks. Drove back home shut the truck off, checked it, this time it was leaking. The only difference was the first time I shut the truck off, I raised the hood and had the truck parked under a carport and when I got home I left the hood down and it was in the sun. So the temperature had to be warmer the 2nd time I shut it down, when it leaked. I asked 2 of my old school mechanic friends that have exp. with carbs but they really are not sure why it only leaks at shutdown. I have very little knowledge of carbs, that is why I purchased a new one. I have the holly reg. set up. set to 3 psi. Any help will be appreciated.

Thanks
JH

 

#1 where is it leaking from - specifically? A picture would help.
#2 The 32/36 should not be run with over 2.5 psi.

 

Thanks for the quick reply, wolves. It appears to be leaking between the carb and top plate on the inside (valve cover side). I was told that it was between 2.5 to 3 psi, I will adjust it down to 2.5 here a little bit. I didn't take any pictures but when I adjust the psi down if it leaks I will snap a few pics.

Thanks again

 

Only want to see where it is leaking from. Take a pic with a screwdriver touching/pointing at the location.

Have you removed the top of the carb to look? If you do take a pic of the gasket.

 

I will go snap one now, I have not. I didn't want to tear it down until I had an idea of what was going on, in my experiences things are more likely to leak while running than not.

 

This is where I saw the fuel, it may have come from the other side but not sure.

 

Is the fuel dripping down to there (where the carb base attaches to what looks like an adapter plate) or is that where it is coming from?

Also, is your fuel pump stock (mechanical) or electric?

 

It is from what I know its a stock mechanical fuel pump. I just went and adjusted the fuel pressure, when I first started the truck the pressure gauge jumped to 5.5 psi (that was at high idle), I am pretty sure I set it 3 psi but I dropped it to 2.5 at high idle and let it run until it got warm. Shut it off and no gas leak, the next time I drive it I will be sure to locate where the fuel is actually coming from. Maybe the fuel pressure was to high and causing it to flood after it is turned off, I will start the truck again before dark and check the fuel pressure once more.

 

Weber's don't like fuel pressure. It's probably forcing the needle and seat open. I'd adjust it down to 2 pounds, then see how it drives. If it's seems to be starving for fuel, turn it up to 2.5 pounds. I think 3 pounds would be to much. You could have a piece of dirt between the needle and seat also.

 

You still have work to do. The place where the fuel is actually coming out of the carb needs to be sealed. So the question is . . . Was the fuel dripping down to where the carb base attaches to what looks like an adapter plate, or is that where it is coming from? It could be that a screw is loose, but a gasket could have been penetrated.

 

Is that a two piece LCengineering adapter? I would check those bolts if so. Fuel pressure regulator is a must also, people say otherwise, but it operates at that pressure for a specific reason. I had issues with my weber leaking, had to go and tighten stuff down every few months for a while too. I've also heard of people using lithium grease sticks on the gaskets to get a good seal, but I've never done it myself on fuel gaskets, just air.

 

Most, if not all, adapters are a casting, not a machined part. When I raced with a 32/36 I would test it with sandpaper on a very flat surface to find the imperfections.