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Old 05-11-2021, 04:14 PM   #1
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Radiator Specialty Surge Tank

I just received a new aluminum surge tank from source mfg. 2004 dynasty with a 400 isl. All the fittings were correct. The spill tube is a little large for the new radiator neck but it tightened up fine. The lower two holes were off so they had to be redrilled on the coaches bracket. The nuts were spot welded but twist right off once the bolt is out. Did this for peace of mind . My old tank is fine , no repairs , no stripped fittings. It just made me nervous. I had a seven pound cap on it until someone here informed me Cummins recommends higher for cavitation reasons.[Mod Edit]
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Old 05-11-2021, 05:34 PM   #2
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I should hone my welding skills a bit and start making these.
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Old 05-11-2021, 06:24 PM   #3
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I should hone my welding skills a bit and start making these.
My skills are fine. My shop is in a storage container. I still would hesitate to build just one, 4 different bungs welded in plus the filler neck. Not a real saving to build just one. Talon stopped building the stainless one due to high material costs, and they were 100 or so more than specialty. I'm just glad there are guys out there producing obsolete products for us. Just put in a window latch from a builder someone posted here. Great product, easy install. Gets rid of the stick in the lower track. Without these forums it would be difficult indeed to keep our coaches repaired. Some of the guys are so sharp.
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Old 05-14-2021, 01:04 PM   #4
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I found 8 x10 x10x1/4" tube you can get shipped for about 80. At 1/4" you could pretty much drill and tap smaller NPT threads but drill bits and taps cost. One place makes the most beautiful alum gas tanks a 3gal is like $103 but they say the don't make pressure of vacuum vessels. Pretty sure that 3gallon one would hold 18psi just by design too bad they have fill neck on it already.
https://fueltankparts.com/collection...-aluminum-tank
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Old 05-14-2021, 06:15 PM   #5
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Learned something about water hoses today. The 3/8 lines from the tank are what they call push-lok hose. The fitting on the radiator has no clamp on it. Took it to a place today , got it explained to me and he cut the fitting out and reused it. Rated at 300psi. Takes a 3/4 Crows foot to make the job easy on the 2004 dynasty.
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Old 05-14-2021, 06:18 PM   #6
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I found 8 x10 x10x1/4" tube you can get shipped for about 80. At 1/4" you could pretty much drill and tap smaller NPT threads but drill bits and taps cost. One place makes the most beautiful alum gas tanks a 3gal is like $103 but they say the don't make pressure of vacuum vessels. Pretty sure that 3gallon one would hold 18psi just by design too bad they have fill neck on it already.
https://fueltankparts.com/collection...-aluminum-tank
I looked at those a few years ago. Making new brackets, sensor fitting etc, just not worth it to me. When I had more energy and less money it may have been.
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