Tightening AC fittings

[Sunroof]

I just had all new AC lines made and am glad to finally toss out those old red cloth covered beat up hoses. I have all but one installed and was wondering just how hard you are suposed to bear down on these fittings. On the evaporator their are two "bonnet" copper fittings that go between the hose and evaporator fitting. Stainless into aluminum via copper?

Can someone let me know if you have to muscle all these hose fittings tight or will a good hard last tug do the trick. Maybe its a question of aluminum on steel, steel on steel or aluminum on aluminum. I for one do not know what the fittings are comprised of but I am it must be stainless, but I am guessing stainless.

By the way, threading that line from the evaporator to the drier is a BEAR!!!!!!!!!!!!!!!

Regards
Bob
73.5T

[Roland Kunz]

Hello

use normal spanners and make them with that leverage normal tight.

if you find leaks you can try to retight them but if you overdoo you need a new fiting.

There are cooper seals aviable helping sealing used/scarfed fitings but that is a own story.

grüsse

[scottb]

I just replaced all of the a/c hoses on my 84. My father is a former a/c guy. His advice was to make the hoses nice and snug, but not to lean on them or else risk damaging the fittings. Of course, always use two wrenches.

[Roland Kunz]

Hello

The fitings changed over the years.

Early, York equiped 911 have no seals in the fitings.

The Problem is if they didn´t get sealed tight people tend
to just use more force ( do or brake ).

grüsse