Tranny lines into radiator

[uscmadman]

I'm replacing my rad on a 97 5.0L and I have removed the tranny lines from the rad. I have two questions:
1. When I install the lines in the rad do i need thread tape or antisieze for the fittings?

2. Do I have to worry about air getting into the fluid lines. Like in a brake system.

Sorry if these questions sound dumb, I'm just worried about making a mistake. Thanks.

 

[my98nnj]

1) A little tape wount hurt
2) No

 

[Cobraguy]

No tape! You shouldn't need it. The fittings don't require that type of seal. If you absolutely have to have something, use teflon pipe sealant. Not tape. It's possible for a itty bitty piece of that tape to get in your oil..then your trans...then your valve body.

 

[wyochimneysweep]

they are flared fittings so if you have to seal them replace them

 

[CDW6212R]

they are flared fittings so if you have to seal them replace them

They seal with the flare surface not the threads. They should not leak ever when tight.

FYI, a lot of aftermarket inverted flare fittings will leak when new. It seems to be common, they take too much torque to stop them from leaking. I often install an o-ring into them to begin with. They rarely ever leak then, and it takes far less torque. Regards,