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tedjr1 
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Joined: May/11/2010 Location: houston Status: Offline Points: 14 |
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 Topic: Gas TankPosted: Apr/03/2018 at 1:14pm |
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Gas Tank Wow's
Hello As some of you may know I have experienced several failures of the gas tank on my 70 AMX. Here I am seeking you advice about what might be the root cause. Here is the back ground information. My original tank failed some years ago and I had it cleaned & repaired at a radiator shop. Then a few years later this repair failed. I then took the tank to Don Hart who uses the Renu process . When this repair failed I purchased a good used tank which had been cleaned by a radiator shop. Now that tank has failed. Three times failure was on bottom but one time on hole was on top of tank. Note tank is non vented type. |
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THE MENACE
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Joined: Nov/04/2008 Location: So. California Status: Offline Points: 3256 |
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Posted: Apr/03/2018 at 3:20pm |
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Instead of throwing more money at old rusted/rusting gas tanks why not get a new reproduction tank from one of the vendors??
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Home of:
Craig Breedlove' "AERO AMX" #1 SS/AMX #9(THE BIG MENACE) 1970 AMX 416,EFI,5 speed(Mine) 1970 Javelin 401, 727 (My Wife's) 1969 AMX,390,Auto,Go Pac (My Mom's) |
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tedjr1
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Joined: May/11/2010 Location: houston Status: Offline Points: 14 |
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Posted: Apr/03/2018 at 4:40pm |
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I had looked into that before.
The biggest problem I saw that none have filler necks. So would have to reuse the old one. Also the new tanks are not coated. |
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White70JavelinSST
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Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 3150 |
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Posted: Apr/03/2018 at 5:23pm |
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Coated or uncoated, a new tank will last one heck of a long time,
especially if you paint the outside with something like Eastwood gas
tank paint and put something between the bottom of the car, the tank and the straps and the tank where things might rub together.
https://www.eastwood.com/ew-tank-tone-metallic-coating-aerosol-13-oz.html?SRCCODE=PLA00010&gclid=EAIaIQobChMI142prISf2gIVjbjACh3x7wHfEAQYASABEgK1CPD_BwE My guess at that point is the tank will last longer than you... Have a radiator shop remove the filler neck from your old tank and solder it to the new tank. |
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70 Javelin SST, second owner, purchased 1972
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Lyle
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Joined: Jul/17/2014 Location: None Status: Offline Points: 772 |
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Posted: Apr/03/2018 at 6:24pm |
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The tank, from what you have stated so far is scrap.
Next question is what have you been putting in the tank and how have you been storing it? New vehicles are plastic tanks for a purpose - alcohol. It absorbs moisture, separates the petroleum additives faster (weeks, not months) and is in itself corrosive to steel in that it enhances oxidation, separation and electrolysis. As advised above, time for a new tank. Then treat it well, with good old petrol and additives if storing. My personal favorite is Seafoam but there are others out there.
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THE MENACE
AMC Addicted
Joined: Nov/04/2008 Location: So. California Status: Offline Points: 3256 |
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Posted: Apr/03/2018 at 7:39pm |
It sounds like you should have collected a few filler necks by now, and you can always have the new tank coated if you feel that is necessary. |
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Home of:
Craig Breedlove' "AERO AMX" #1 SS/AMX #9(THE BIG MENACE) 1970 AMX 416,EFI,5 speed(Mine) 1970 Javelin 401, 727 (My Wife's) 1969 AMX,390,Auto,Go Pac (My Mom's) |
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gd5052
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Joined: Jun/16/2011 Location: Illinois Status: Offline Points: 77 |
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Posted: Apr/04/2018 at 10:43am |
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Have you tried Redkote tank sealer
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Lyle
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Posted: Apr/04/2018 at 11:08am |
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The trouble at this point is that previous tank sealing has been done and failed. You would not know the compatibility of a new sealer adhering to the old sealer. Then to compound the problem the leaks may have gone under the old sealers and rotted the metal. The new sealer will not get there either.
Time for a new tank, unless you split the tank, clean to bare metal, re-coat and re-seam (costing more then a new tank).
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tedjr1
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Joined: May/11/2010 Location: houston Status: Offline Points: 14 |
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Posted: Apr/12/2018 at 1:51pm |
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Thanks for the suggestions. Looks like a new tank would cost north of $500. What with new sender etc. plus filler neck welding.
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scott
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Joined: Jul/10/2007 Location: Wildwood Pa. Status: Online Points: 2485 |
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Posted: Apr/12/2018 at 6:01pm |
Read up on the new senders before you buy one: http://theamcforum.com/forum/warning-ebay-sending-units-are-junk_topic92568.html |
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tedjr1 wrote: