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Fuel Bowl Out-How to test for leaks? Presurize with Air Compressor?

973 views 4 replies 3 participants last post by  pjwoolw 
#1 ·
I have my fuel bowl out. It obviously has a leak (or it's related hoses do) because my Valley Pan looks like a lake after even a short drive. How can I test the bowl for leaks? I did notice a drip while the engine was running by the water sensor port (I think).

But regardless, I'd like to pressurize it if it's possible and watch it for drips while I have it out. What ports need to be plugged? I can't think of an easy way to plug the two flare fitting ports on the front that the two screw on fuel fittings went to. Do I need to plug those if I pressure test?

thanks,
Nick
 
#4 ·
When you get it out you'll see what needs to be blocked. If there is a problem with housing itself it may be cracked or corroded through on the bottom. But mostly its the o-rings and sensors that leak. I was thinking of doing some kind of a pressure test myself. The FPR would be the only concern.
I have it out. I took it out because I could see a steady drip when the engine was on near the water sensor on the bowl. I wouldn't rule out the lift pump leaking. I don't know how I'd check it though since the engine can't run without the fuel bowl (or some other way to supply fuel).


So FPR... is that the black thing that looks a little like an air compressor regulator? Can I damage that by pressuring the fuel bowl?

Lastly and probably most important... if a port such as the water sensor leaks is there anything I can do about it or does that mean it's time for a new bowl?
 
#3 ·
When you get it out you'll see what needs to be blocked. If there is a problem with housing itself it may be cracked or corroded through on the bottom. But mostly its the o-rings and sensors that leak. I was thinking of doing some kind of a pressure test myself. The FPR would be the only concern.
 
#5 ·
Here is a pic. The black piece is the fuel pressure restriction sensor. Attach to the FPR that is attached to the bowl. The FPR is easily cracked so is the bowl for that matter. I'm not sure what it would do if pressure was put on it. But I would think 20 or 30 lbs psi would be OK. Not sure though. There are o-ring kits available.
 
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