Crap in my gas tank

Tom Powell · Posted: Mon Feb 25, 2013 3:40 am Post subject:

Here is a glass bowl filter that I hacked into my '69 camper fuel supply. I got bad gas one time which was probably a mixture of diesel and gas. The engine would run only at high rpm and lacked power. I eventually found the problem by draining some fuel and swirling it in a glass jar and the two fuels separated. After that I added the glass bowl filter. A Vanagon with a rusty tank might be a candidate for this hack. Rust or water will be visible in the bottom of the glass bowl.

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Aloha
tp

jameskarst · Posted: Mon Feb 25, 2013 11:32 am Post subject:

regis101 · Posted: Mon Feb 25, 2013 5:04 pm Post subject:

I had a vendor email reply about their tank. It seems that the inside is not precoated with a rust preventative.

So then what. A new tank with raw steel insides that will begin rusting as soon as I uncrate it?

Have any of you sealed the inside? Or do we just let it ride and wait another 20yrs.
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Peace, Regis

regis101 · Posted: Mon Feb 25, 2013 5:28 pm Post subject:

I'm thinking that I can't add tank sealer due to the pick up and return screens. It's not the same as a tank from an old Mustang or Nova.
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Peace, Regis

cellerdoor · Posted: Mon Feb 25, 2013 6:02 pm Post subject:

I bought a "spectra premium" tank which is what i think most of the usual vendors stock.

Made from ni terne steel which is rust resistant and supposedly doesnt need an additional coating (although I applied truck liner to the bottom and rust paint on top). There was a coating on mine (probably nickel) since when I scoured it up to accept paint better a fine dust came off.

Tons of stuff on google about this tank and how well it holds up to rust. Manufactures web site says that it does not need additional coating.
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1986 Westy

regis101 · Posted: Mon Feb 25, 2013 6:59 pm Post subject:

Nice. Thanks
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Peace, Regis

SCM · Posted: Mon Feb 25, 2013 7:02 pm Post subject:

Urban Farm Vehicle · Posted: Tue Mar 19, 2013 11:33 am Post subject: Fuel flow rate

Hey there!
Does anyone have the free flow rate for an '85 tank from the Bentley? Is that after the tank or after the filter?
Major whine from the cavitation happening!
Many thanks
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Russ
'85 Doka

regis101 · Posted: Sun Apr 28, 2013 7:45 am Post subject:

Can't find tank free flow rate. But you could pull the hose from the tank as shown in the pic's of the OP. You can back that up with free flow from the return side also.

The Bentley shows on 20.7 and 20.29 that a measurement taken after the FPR should produce 500cc/30 sec ( approx. 1/2 qt ).

As for our hot rod, the tank and all the trimmings was recently changed out.
I still had a bit of whine so the last piece of the puzzle was to change the rubber FP mounts. The new rubber mounts were a bit more pliable than the OE parts and I didn't have the greatest confidence that they would solve the friggin' issue. But alas, all is as quiet as a church mouse. In earlier tests, I removed the FP from the OE mounts and had it hanging free style but that FP was wasted. More swinging at curve balls.

Any new resonance vibratory whining sound from the FP and not from me can be addressed with carpet on the floor and turning the radio up.
I'm done.
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Peace, Regis

nemobuscaptain · Samba Member Joined: March 07, 2002 Posts: 3874

greebly · Posted: Sun Aug 04, 2013 9:56 am Post subject:

Mann diesel filters are made of steel, filter to 10 microns, and have a water seporator feature with a drain valve.

Crankey · Samba Member Joined: July 11, 2004 Posts: 2659

regis101 · Posted: Sun Aug 04, 2013 2:23 pm Post subject:

Those tanks are pretty much hollow. The sender comes out the top on the 'Stang.

The Vanagon tank has baffles, a center well, and the pickup tube for the out flow is screened. Maybe the inlet. Dunno about that.
Some one posted the inside of the tank after they cut it apart.

So, imo, it'd be a bit difficult to get the inside coated evenly as compared to the early American tanks. Used to be able to throw a chain inside of them and shake it around for rust removal
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Peace, Regis

Crankey · Samba Member Joined: July 11, 2004 Posts: 2659

sort of unrelated, but where does the metal fuel line go inside the tank so it isn't ever starved for fuel going up hill or down hill when the tank is say under 1/4 full ?

and what kind of paint/coating would be best ?

I wonder if a plating shop could do zinc plating inside

regis101 · Posted: Sun Aug 04, 2013 4:20 pm Post subject:

Here a link to some pic's of the inside. I can't find the other thread with pic's of it opened up like a clam shell. These pic's are from the tank being sectioned. You can see that it's kinda busy in there.

http://www.thesamba.com/vw/forum/viewtopic.php?t=2...p;start=20
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Peace, Regis

insyncro · Posted: Sun Aug 04, 2013 4:29 pm Post subject:

A new tank is $160.
It has been covered in other threads and other forums...coating the inside of a stock 2wd Vanagon tank does not work well.

t'sunamibus · Posted: Sun Aug 04, 2013 4:40 pm Post subject:

I researched a lot of sites before replacing my entire fuel system on my '82. Everything is new right down to the specific hose and clamps recommended by senior and knowledgeable members on this site. I also went with new injectors. I did the go westy upgrade with the prefilter delete, I think a prefilter is in my near future.

Crankey · Samba Member Joined: July 11, 2004 Posts: 2659

yeah, I picked up a NOS tank, it was sold as an 85 tank but turned out the fill hole was the wrong size for my reseal kit. my original tank looked rust free everywhere you can see inside so I just used it. maybe I'll get the grommet kits that fit this NOS tank and swap them out someday.


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