7.5mm, thank you. The last time I did this the plastic tube was a good fit
inside the hose, I ran it in 6" or so & used two clamps with no leaks. I
was planning on doing this again.

Rob
vwrobb@gmail.com

On Fri, Jul 31, 2020 at 3:30 PM Dennis Haynes <d23haynes57@hotmail.com>
wrote:

> At some point VW went to a 7.5mm ID hose in part to reduce reliance on the
> clamps. For the firewall fitting it gets a bad rap. A more common place to
> leak is where the hose attaches to the plastic tube from the filter. Hose
> selection and clamp choice and installation is extremely critical. Too lose
> and the hose slides off or leaks, too tight and the plastic tube collapses
> especially after some heat. On other vehicles that use this type of tube a
> sleeve goes inside to support the tube from collapsing.
>
> Spring or crimp clamps are the best choice here.
>
> It is worth noting the OEM the hoses on the engine and outside the
> compartment are different part numbers-construction. With the aftermarket
> stuff we go from 10-15 year hoses to 2-5!
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of Rob
> Sent: Friday, July 31, 2020 4:59 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Fuel hose size
>
> What size fuel hose do I need to replace the one from the firewall plastic
> fitting to the engine?
>
> Rob
> vwrobb@gmail.com
>