Gas Tank

[Lockleaf]

Imperial gallon vs. US gallon vs. Liter

[datzenmike]

Liters X 0.264 gives US gal.

Liters X 0.22 gives Imperial gal.

[Mitchell]

Does anyone know if this will work in a 79 620 long bed regular cab...

https://autoplicity.com/3686519-dorman-576-808-fuel-tank?gclid=CjwKEAjw_uvHBRDUkumF0tLFp3cSJACAIHMYTSQG5bFB8v7Jp2Z4y3BrtObeIJ6Ocz-qy535OfV47BoC3rTw_wcB 

[craigba]

Does anyone know if this will work in a 79 620 long bed regular cab...

https://autoplicity.com/3686519-dorman-576-808-fuel-tank?gclid=CjwKEAjw_uvHBRDUkumF0tLFp3cSJACAIHMYTSQG5bFB8v7Jp2Z4y3BrtObeIJ6Ocz-qy535OfV47BoC3rTw_wcB

[Mitchell]

Hello, For anyone interested, I took a chance and purchased the Dorman 576-808 Gas Tank, aka Spectre NS4 (listed for a 83-86 720) and it did fit in a 1979 Datsun 620 Regular Cab Longbed without modification.

Bolted right in. But in the process of renewing all of the 1/4" fuel lines, Note: 2 of the original lines were just a little short because the outlet came out of the tank straight instead of at a 90, but planned to replace those lines anyway, a minor inconvenience. This new tank ended up about the same cost as a POR 15 kit, plus another can needed to seal one of these roughly,17 us gallon tanks...

[Draker]

Hello, For anyone interested, I took a chance and purchased the Dorman 576-808 Gas Tank, aka Spectre NS4 (listed for a 83-86 720) and it did fit in a 1979 Datsun 620 Regular Cab Longbed without modification.

Bolted right in. But in the process of renewing all of the 1/4" fuel lines, Note: 2 of the original lines were just a little short because the outlet came out of the tank straight instead of at a 90, but planned to replace those lines anyway, a minor inconvenience. This new tank ended up about the same cost as a POR 15 kit, plus another can needed to seal one of these roughly,17 us gallon tanks...

 

Wow.. thanks for that update!

[Charlie69]

1980 720 tank bolts into A 78/79 620 frame mount.  The regular cab and the king cab in the 78/79 620s use the same tank.  It does not fit the earlier 620s as they are bed mount.

[Cardinal Grammeter]

Is there anything new regarding solutions for the early 620 tanks?  Claims of a repo out there stated in other threads - perhaps for the later frame mount style?

 

I'm looking at welding mine.  The right side mounting bracket has a flange which bolts to the flange on the tank.  Water wicks into these flanges and rots out the tank flange.

 

I'll remove the bad tank flange entirely, weld as required, and then weld a flange piece where missing.

 

The Dorman tank is about $200 so even for that money, I'd still weld.  $100 and I'd buy one.  $150 - hard to say...

 

Even if I found a used one for $50, the shipping would put it way over $l00 from West Coast to Pennsylvania.

 

car-part.com has one listed that is in poor shape for $33.

[datzenmike]

I drained mine, filled with water leaving a bubble near the rot and worked on it. Ground down tinned with solder and soldered a piece of brass from a rad onto it. Had it for 15? years.

[Cardinal Grammeter]

I will do solder if I can, however where it rotted out is the flange where the mounting bolts are.  So I need the repaired flange to be strong enough.

 

EDIT: 

 

was just thinking:  if I can solder it up, I could solder an "angle iron" piece to reinforce/replace the rusted out flange. 

NEEDLE DESCALER:  will use to break up rust

SANDBLAST:  will use to get down to bare metal but seem to recall this contaminates metal for....  (don't remember) - can use cartridge rolls too

BRAZE:  I don't think I'd do this since it really is a mess if any subsequent welding required.

 

Might weld and then seal pinholes with solder (!)

Edited August 24, 2019 by Cardinal Grammeter

[datzenmike]

 That was where mine was also. The formed ledge collects mud and wet leaves causing rust to form.