When changing out my fuel lines, I noticed that the supply line hoses on
the Vanagon (�87) were 3/8 inch that the ventilation lines were � inch.
It was my understanding that these should be 7mm and 5mm respectively.
Is this the case, and if so would this affect the fuel system
performance or is it ok as long as the connections are snug (when
clamped) and don�t leak?
 
Thanks,
Darren.