I'm at my wits end with these. I replaced all hoses on my car last year. Two of them have continued leaking. Mind you, it's a slow leak that would require that I add coolant every other week. I finally found them by running my finger under them after a drive. I don't understand why they're leaking, The hoses are new, the clamps are new, and I did sand to smoothen the fitting to which they connect to. Only one of the ends of each of the hoses is leaking. The other one is dry.

Any ideas?

It's the two that I have pointed to in the picture. (red circle and red arrow) (the leftmost one is slightly out of the picture):





At this point I don't know how to solve this. New hoses? New clamps? Maybe the fitting is cracked? Maybe I need to buy a new supercharger cover and intercooler? Any ideas?

 

I'd get some of the proper clamps, as per the rest of the hoses. Jubilee clips don't always exert an even pressure. Plus, in the photo it looks like you used jubilee clips that are too big and just tightened them to fit - the problem with that is that there is a defined radius in the area that accommodates the screw and that is probably too big for the pipe it's exerting pressure on, leading to the opportunity for leaks.

 

Alright, I’ll order a set of proper clamps and hope for the best.

Edit: I ordered 5 of the proper clamps directly from my local Jaguar dealer. A little expensive at about $5 per clamp, but seeing that they are nigh impossible to find, I would rather have some extra clamps just in case. They’ll have them here in 3 to 5 business days.

 

If you’ve already ordered may not matter but I use these:
https://www.mcmaster.com/5443K13

Changed to them when I had everything apart for the twin screw install. Used a little pool o-ring lube when I assembled everything to make it easier to get everything together and sealed well.

 

Oh those look cool, but yes, they're already paid for at my local Jaguar dealer. It's the first time I've bought something directly from them. I get them on my hands much quicker than I would ordering online and the price difference between them and the backordered ones at SNG wasn't too much.

 

I installed the new OEM clamps and I am still getting the leaks, however, because the hose ends were absolutely crushed by the worm clamps, I have decided to buy a new hose of the 90º hose. For the other hose, I think cutting the 1 inch of the end of it with a precision knife and using the new OEM clamps could solve its problem. Too bad the new hose will likely take a few days before it arrives. I really wanted too be able to give the car a good drive on Thursday for my orthodontics appointment. My doctor's is only working at one of her offices and from what google maps shows, the route includes scening mountain backroads.

When I removed the hoses the aluminum fittings (is that the name?) did not look visibly cracked or bent, they were quite smooth too. I still gave them a light quick pass with some sandpaper. (I had 1000 grit on hand, is that too fine?)

 

I'd guess, as you suspect, that the jubilee clips have damaged the hose enough to cause the leak to continue - hopefully you're nearly there!

 

Yeah, the end of the hose where the jubilee clamps were was noticeably flattened. Tracking says the hose should arrive on Saturday. I’m keeping my fingers crossed in hopes that a new hose with the proper clamp finally solves this problem.

 

That small elbow hose finally arrived today. I installed it with the new OEM clamps and cut back the other hose. I’m happy that the new hose is not leaking. The other hose still leaked even after cutting it and installing new clamps. I will splice it when the car cools down. Hopefully that is the end of the coolant leak saga.

 

Good stuff, and thanks for the feedback. It's nice to have an outcome reported.

 

Final update, the splice worked. No more leaks from those two hoses.

Now I will anxiously monitor my coolant to make sure there are no other unforeseen leaks from other hoses. Even though I have replaced the entire cooling system and hoses at this point.