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Old 05-22-2018, 08:18 PM   #1
Lando
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Default Fuel rail leaking

Fuel rail is leaking at one of the (what looks like) silver soldered joints. Anyone try to repair these with silver solder? No 240s in the junk yards near me right now.
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Old 05-22-2018, 08:24 PM   #2
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I would braze it.
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Old 05-22-2018, 08:24 PM   #3
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I have tried. It worked for a while. If you need one, I can probably dig one up. What year?
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Old 05-22-2018, 08:57 PM   #4
Lando
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I have tried. It worked for a while. If you need one, I can probably dig one up. What year?
It's an 86, but I installed the late style with the schrader valve. Where was yours leaking from? Mine appears to be leaking from where the front padeye (for mounting to the intake) is soldered to the rail. I'm going to take it out and confirm it is leaking from that spot by pressurizing it to 50psi with a bike pump in a bucket full of water.
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Old 05-22-2018, 09:04 PM   #5
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I would braze it.
Hottest I've got it map gas, what rod would you recommend at those temps?
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Old 05-22-2018, 09:11 PM   #6
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I have a spare fuel rail if you want...?
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Old 05-22-2018, 09:20 PM   #7
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Hottest I've got it map gas, what rod would you recommend at those temps?
Silver solder.
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Old 05-23-2018, 09:27 PM   #8
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For sure leaking from the solder joint. Pumped it up to 45 psi and used some soapy water:



That joint isn’t even designed to seal, it’s just to hold the padeye, not sure how it’s even leaking from there.
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Old 05-23-2018, 09:43 PM   #9
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I had the same issue before. Fuel rail cracked in the same place. I ended up just replacing it as I didn't want to bother repairing it.
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Old 05-24-2018, 02:23 AM   #10
Lando
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It's not leaking now. A few drops of 12.5% HCl and some silver solder did the trick.

I think the cause of failure is one of the mounting bolts worked its way loose. Perhaps the vibration caused the joint to crack.
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Old 05-24-2018, 12:32 PM   #11
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Cool.
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