So I installed this engine from new and replaced every breather pipe. All fuel lines were new about 1 year ago roughly. Jacked the van up at the rear to do some work. Smelt fuel. Looked around and saw one perished line here Which is odd. I changed this immediately as it had residue of a leak. Then I inspected near the tank outlet where I have my in line filter, and there is the beginnings of cracks but no residue just yet. Is this normal? Fuel lines are Which I have always used. Is it because they are exposed to the elements? I didn't drive it much at all on salted roads although there were a couple of exceptions.