What's this on the power steering cooler lines?

[johnnyCZ]

I found few oil drops on my garage floor and found out that those are power steering fluid cooler lines that leak somewhere. I've cleaned the area trying to find out the exact place of leak. It looks like PS fluid temp sensor or something. But I could not find this part on RockAuto. All I can find is PS cooler & rubber hoses, no sensors or connectors. Do you know what is is and where to get it?

 

[01ssreda4]

Looks like a fitting to disconnect the line so its not all one piece.

 

[Bowzer]

That's a flare nut. Is it leaking between the two fittings? If so, I'd take it apart and inspect the flare face on the nut side for a crack or flattening. If it's not damaged you might be able to seal it by putting some PST sealant on the flare face when reconnecting. I use Loctite 567 for this.

 

[johnnyCZ]

Yep, those are most likely two connected flare/barb fittings. And there's some sensor in one of them. I cleaned the area thoroughly and now waiting for the leak to start. Took the truck for 15mi trip around yesterday but still nothing. It probably need to go to a highway for a while.

 

[johnnyCZ]

Ok, no matter what this is, the leak most likely came from the loose clamp. I was able to rotate the hose on the fitting without great efforts. So I replaced it with new clamp. Let's see...