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View Full Version : Please Check My AC Crimps



Papa
02-10-2026, 02:04 PM
This is my first attempt at crimping AC lines and I'd appreciate some additional eyes to check my work.

https://thefactoryfiveforum.com/attachment.php?attachmentid=225415&d=1770750092

https://thefactoryfiveforum.com/attachment.php?attachmentid=225416&d=1770750092

https://thefactoryfiveforum.com/attachment.php?attachmentid=225417&d=1770750092

acmikee
02-10-2026, 02:11 PM
pressurize it with nitrogen and find out if it leaks

65 Cobra Dude
02-10-2026, 02:46 PM
They look good. Also, check to make sure you can see the hose through the hole on the side of the crimp.

Henry

PNWTim
02-10-2026, 02:53 PM
^^ Like he said. Your crimps look good. Without pressuring with an inert gas like nitrogen or CO2 there is no way to tell though.

It's pretty basic. If you use a decent crimper, if it crimps more or less symmetrically and you don't let the hose slide out you should be good to go. I like to draw a little line on the hose at the edge of the fitting with a pencil. In addition to the small hole in the fitting, it aids in a quick visual check and indicates if the hose slipped too far out during the crimp.

Papa
02-10-2026, 03:16 PM
Thanks everyone for the quick replies. I don't have any way to pressure test, but followed the MasterCool 71550 guidelines to apply the force during crimping. There is a reference marks on the tool. I also did look through the lines and everything looked clear.

acmikee
02-10-2026, 03:23 PM
DO NOT USE CO2 it will add moisture to the system

PNWTim
02-10-2026, 03:42 PM
DO NOT USE CO2 it will add moisture to the system

For clarity - I was not recommending testing the system with CO2 but rather individual lines that will be open to the atmosphere after testing.