Number 8 keeps dripping

[Greenie]

The return line or plastic housing has developed a leak that o-rings and new lines have not corrected. The engine starts fine, I don't like the diesel fuel smell and small puddle on the garage floor. I have not replaced the flimsy looking black plastic cap (weren't the original caps metallic?) Only 10,000 miles since these were installed - the originals never dripped for 25 years.. Am I missing something?

 

[Nero]

Original were plastic, it could be that you need to replace it too.

 

[hacked89]

replace cap, o rings, ensure that the hoses aren’t cut to a length that it puts pressure on the cap. Biggest reason they leak. Especially number 8 where it dips under the GP the bend tends to put upward pressure on the cap.

 

[WrenchWhore]

Some of my aftermarket caps leaked. They were about .010" bigger on the inside that compressed the O-rings. Specifically the ones that were the 90 degree turn ones. I ended up going back to a mix of old caps and new ones that measured correctly. Took me three tries of doing the O-rings before I noticed this. No leaks since.

I'd also recommend to use something like red wheel bearing grease to install the caps over the o-rings.

 

[Nero]

If you don't have wheel bearing grease, Vaseline works pretty well too.