Date: Sun, 2 Sep 2012 17:11:00 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Fram Gas filter
In-Reply-To: <708B86A56DF14F48B53CE883D1DBB3A1@troya3a1e48888>
Content-Type: text/plain; charset=windows-1252; format=flowed
Hi,
not sure what you'll do with the 11mm hose.
8mm and 5/16's are extremely close to each other. In sockets and
wrenches they can be used interchangeably just fine.
the diff is about .010 inches.
actually ..it's .025 - 25 thousands as show in this
portion of a chart -
5/16 0.3125 7.9375
. 0.3150 8.0000
that says 8mm is .3150 inches.
and 5/16's is very close to that.
no way are 9mm and 5/16's the same thing. 9mm is closer to 3/8ths almost.
Which is why I don't buy vanagon parts at a FLAPS. They are not always
perfectly 'swift' let's say.
of course, never squeeze any hose, especially a fuel hose down to a size
smaller than it is ..like squish it down ..that's asking for trouble.
If a hose is hard to get over a hose nipple, and it's the correct size,
use some WD-40 on the hose nipple ..
on rare occasions warm the hose, as in hot water perhaps. Or careful use
of a heat gun.
On 9/2/2012 11:50 AM, Troy wrote:
> Many thanks to those who responded to my inquiry. I think I may take Dennis's advice and simply eliminate this prefilter. Not sure I why I was calling the larger canister fuel filter a "charcoal" filter, as I was corrected once before about that and know better. I simply meant to say the larger canister filter.
>
> I did find this writeup at the Go Westy site that others may find interesting:
>
> "From 1980 to about 1984, VW ran only the small square pre-filter before the fuel pump. This filter (133-133-511) had a 7mm inlet nipple and a 12mm outlet nipple. The fuel tank on a 1980-85 Vanagon has a 7mm outlet nipple. The electric fuel pump on all Vanagons has a 12mm inlet nipple. The pre-filter also acted as a sort of adaptor.
>
> Sometime in 1984, VW started putting on a post-filter, 0-450-905-030, and also kept the pre-filter. Then, at some point in 1985, they eliminated the pre-filter and replaced it with a little 7mm/12mm adaptor fitting. They did this not only because the pre-filter was redundant, but also because it is tiny, clogged too easily, and caused the fuel pump to starve for fuel and cavitate—thus shortening the life of the pump. Finally, in 1986, VW changed the design of the fuel tank, and the nipple coming out of the tank was modified to 12mm, which eliminated the need for any pre-filter or adaptor.
>
> The 0-450-905-030 post-filter is very common and very large, so it usually lasts at least 30,000 miles. The nipples (inlet and outlet) are both 7mm, which matches the outlet nipple of the fuel pump and the plastic fuel line that continues on. So, installation is straightfoward. "
>
> As to the hose size on the fuel canister, NAPA has this listed as 8mm. I picked up a 5/16 diameter hose, which I think is closer to 8 mm and it fits quite snug. Ironically 5/16", 9 mm is written on the hose! 7mm I would think would be too small or require a lot of force to put on. I did purchase some 11 mm hose from a import shop, so have that at least.
>
> Troy
>
| 
