[T3] Injector hose

[Jim Adney]

On 9 Jun 2020 at 8:28, William Jahn wrote:

> You can use regular 5/16" fuel line if you can find a good brand
> and want to replace it every 2 years.

Any decent hose should last much longer than 2 years in this application. I 
seem to get at least 10 years out of the stuff I use. I've used Airequip and 
Parker hose, as well as Gates and some other stuff. Airequip and Parker are 
excellent. The brand X stuff I got from J C Whitney, decades ago, was poor.

Hose with larger OD will have a larger minimum bend radius, which can be a 
problem in some of our locations.

The problem with the euro cloth covered hose is that it's too small. It has to 
be stretched too much to get over the fittings. That makes it seal really well, 
but that extra stretch puts extra stress on the rubber and that's where it fails. 
The euro stuff is 7 or 7.5 mm ID, while the fittings are 8 mm with 9 to 10 mm 
bulges. US 5/16" (= 8 mm) ID hose seals perfectly whereever there are 
bulges and can be sealed with care even on the 2 places where there are no 
bulges.

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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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