As I was replacing the vacuum hoses on my 93.5 engine, I noticed that the vacuum hoses running under the manifolds are not the same construction as the other : they’re reinforced rubber, like fuel hoses, and have markings “BL CVL 7”
I understand this is because they can carry fuel vapours from the charcoal canister : are those really standard fuel hose ?
as they seem to be quite loose on the fittings, I measured the said fittings, which are about 1/4 (6.35mm), while the hose are 8mm ID, and need some worm clips or spring clips to stay in place
Silicone isn’t a good move with fuel, so I thought using 1/4 fuel hose to replace them to get a better fit, but they’ll become loose in their P clip along the water rail
what would be your suggestion as the best replacement option?