Teflon Tape on Bleeder Screws

[yonyon]

Originally Posted By: mechtech2
Tape will do nothing for extraneous leaking during a bleed. Threads are AFTER the seat.
Bad technique IS a brake bleeding problem, however.

I would not use T tape on a brake bleeder fitting for another reason - it is very soft and has the potential to loosen the bleeder's seating . What is tight may be loose later.

There are reasons that NO mfr ever uses T tape on bleeder screws.


If teflon tape makes the bleeder come loose then it was waaaaaaaaaaaay too loose to begin with. I don't use it on bleeders myself, but teflon tape is soft stuff.

 

[huffmuds9320]

I was reading the owners manual for the mityvac and it does mention that some air bubbles may be seen as air can get past the bleeder screw threads. And it will not affect the brake bleeding process. The manual also mentions that you can put teflon tape around the threads or use grease to help eliminate the air bubbles.

 

[yonyon]

For the love of the gods (Lemmy and Ozzy) don't use grease!

 

[HTSS_TR]

I didn't bother to use grease and/or teflon tape on bleeder screws, a stream of tiny air bubble was seen on the hose get past the bleeder screw threads into Mityvac container and no way air can get back into brake line. The brake pedal was firm after bleeding with Mityvac 7201, no sign of air in the brake system.

 

[doitmyself]

Originally Posted By: yonyon
For the love of the gods (Lemmy and Ozzy) don't use grease!


Why? Silicone grease is used in the internal assembly process of calipers. Why would dabbing grease around the point of entry instill the "hate of the gods" on me?

I agree with those who think this is a non-issue, but it sure feels good to see no bubbles coming out (the reason I simply choose other methods).

 

[mechtech2]

Only poor procedure can benefit from tape on bleed screws.
And you will have problems anyway because of the bad technique used.

If anyone has a better idea with T Tape, go call Ford and Chevy to change their ways.

 

[SteveSRT8]

If Ford or GM can save a nickel they'll do it. I wouldn't expect them to add any upgrades soon.

 

[bxd20]

This is why I gave up on vaccuum bleeding (had a MityVac) and switched to pressure bleeding with Motive. Lesson learned the hard way. You can be FAIRLY sure that stream of tiny bubbles is coming from the threads and not from the line, or you can push the fluid through and be 100% certain you have the air out.

 

[HTSS_TR]

How can air bubbles go back into the brake line with a vacuum bleed using Mityvac ? Brake fluid and air bubbles, if any, are going into the Mityvac container.

I done brake bleeding with both Motive power bleeder and Mityvac, I like Mityvac much better.

 

[mechtech2]

In that picture^, what is causing the pressure to move the air to air [as diagrammed]?
And if it did leak, who cares? it is after the fact.

 

[doitmyself]

Originally Posted By: mechtech2
In that picture^, what is causing the pressure to move the air to air [as diagrammed]?
And if it did leak, who cares? it is after the fact.


Not pressure, but vacuum on the bleeder outlet. I copied this picture off some car forum where a guy was suggesting to put grease on the threads where they meet the caliper to prevent air ingress.

I guess some people worry that a stray bubble might work its way into the caliper and cause cardiac problems.