I'm looking at my options for replacing the oil cooler lines and am down the path of replacing the lines to the oil cooler with stainless steel AN hoses. Has anyone been down this road before?
It looks like Jaguar used two different threads on the hoses. I think the hose that comes from the back of the engine to the oil cooler is your garden variety SAE 45* flare. The threads look to be 1-1/16 x 14tpi. That's easy enough to find an AN adapter/fitting for.
The hose that goes from the oil cooler to the front of the sump looks like an SAE inverted flare. The threads look to be 1-1/16 x 16tpi. I'm struggling to find an adapter in that size.

Has anyone looked into this before? Am I correct on my thread sizes?

 

Took my 94 XJS out and when I parked there was a massive lake of oil under the car. Spoiler alert was the Oil cooler line at the engine. I am struggling to have lines made as I am not putting on 27-year-old ebay lines. Let me know when you find an answer, please.

 

Why not take the old hose assemblies into a hydraulic shop and have them put new flex hose sections on? That would be much easier than have to get adapters to AN fittings. Would AN fittings even fit in place? One reason I dislike AN is they are so large compared to typical hydraulic fittings.

Consider the original hoses have lasted for 25+years, simply replacing them will buy you lots more time.

 

I didn't have any luck finding adapters in the correct size to match the Jaguar fittings. But I was able to find -12 steel weld fittings and I can work with that. I'll cut the old Jaguar pipe with the correct fittings and TIG-weld the -12 fittings to that. Then I can run standard AN fittings from there.

AN fittings and the Jaguar fittings are very close in size with the AN fitting being slightly (but not significantly) smaller than the existing Jaguar fittings.

In my opinion, the advantage to plumbing with AN is the ease of replacing the hose in the future (the fittings are reusable). I like to replace all the rubber components (tires, fuel lines, radiator hoses, oil lines) every 7 years.
It also gives me more options in selecting an oil cooler.
Finally, all this will cost less than a new set of Jaguar oil cooler hoses and an oil cooler.

Taking the existing Jaguar hoses to a hydraulic shop and having them put on new rubber hoses is a great option. I just prefer something I can do myself.

Jaguar fitting on the left; AN -12 on the right

Jaguar fitting on the left; AN -12 weld bung on the right.

 

Thanks for the easy fix. Dropped hose off at a hydraulic shop in the morning, and they were ready by the end of the day. Yes, I do all my own work, and this is a little pricey, but I did not have the time to try and figure this out; I did not want to crimp and wanted them to pressure test line. I ordered new gaskets online from Moss, and the gaskets showed up in 2 days. Price $80 per line. Putting on tomorrow and taking her out for a drive.

 

Closing out my thoughts on this. By using 12AN weld bungs I was able to replace the factory hoses with braided stainless steel hoses. It was cheaper than a new set of Jaguar hoses and I'd guess more expensive than going to a hydraulic shop. Bling factor doesn't count as no one will ever see them anyway

I did end up using the standard Jaguar oil cooler for the sake of simplicity when it comes to mounting the AC condenser.

 

Thorsen, that looks superb! The OEM fittings are something unheard of and unobtainable like 35/36ths UNF and nobody will sell you them. My question, how difficult was it to weld the AN fittings onto the pipes, as when i try this sort of thing with my MIG I always blow a hole in the pipe! Any tips?

 

I think it needs to be TIG welded for it to work. I know a professional welder who can do it in about 10 minutes but he welds all day long so he's got the skills.
My next job for him is to weld up a coolant cross-over pipe from 316 stainless steel. I should never have to worry about it ever again.