Brake Bleeders

[Jim Harding]

Anyone know the spec for the Jag rear brake bleed screws? I want to install the "speed bleeder" type but need the diameter/thread pitch. They "look" like 3/8 X 24, but that isn't a metric type. What did Girling use?

Jim Harding
La Plata, Maryland

1982 #3004
http://www.capitalareacobraclub.com/albums/album26/1aLeftside.thumb.jpg

[Jim Harding]

Hmmmm guess this question stumped everyone[8][8]

Anyone care to even guess:D:D:D

Jim Harding
La Plata, Maryland

1982 #3004
http://www.capitalareacobraclub.com/albums/album26/1aLeftside.thumb.jpg

[nolastyankee]

Jim,
Jaguar is an English company so none of the threads on the rear end or the brakes are metric. I can check tonight as we have calipers in a box, but 3/8 sounds correct. I'll let you know tomorrow.

Unique 9122 - 289 FIA Cobra - The Legendary "Spence" Car

[Brent]

I do believe it is 3/8 X 24 NFS thread

http://www.uniquecobra.com/uploaded/Brent/bleeder jpeg.jpg

Brent

[Jim Harding]

Brian.....

Well, that just shows how much I know:D:D

I thought the Brits had a different standard than what we yank's use. I know of British Standard Pipe, and most of the world using the metric system, so I figured something else was used on the girling calipers. Learn something new everyday..... and never to old either;)

I wait your reply.... thanks



Jim Harding
La Plata, Maryland

1982 #3004
http://www.capitalareacobraclub.com/albums/album26/1aLeftside.thumb.jpg

[Jim Harding]

Hey Brent.. thanks!

Jim Harding
La Plata, Maryland

1982 #3004
http://www.capitalareacobraclub.com/albums/album26/1aLeftside.thumb.jpg

[nolastyankee]

Jim,
The brake bleeders are 3/8-24 pipe thread. Let me know if you need any more rear end or brake dimensions as they are all accessible...For now!

Unique 9122 - 289 FIA Cobra - The Legendary "Spence" Car

[Jim Harding]

Brian,

Once again "thanks" for getting me past another hurdle with my car. The info you gave me last year about the upper shock mounts saved me a few headaches too.

Hopefully, I won't need anymore info..... at least not until the day after you put the thing back under the car:D:D

Jim Harding
La Plata, Maryland

1982 #3004
http://www.capitalareacobraclub.com/albums/album26/1aLeftside.thumb.jpg

[davids2toys]

Jim,
The brake bleeders are 3/8-24 pipe thread. Let me know if you need any more rear end or brake dimensions as they are all accessible...For now!

Unique 9122 - 289 FIA Cobra - The Legendary "Spence" Car

where are they accessable, I want to gather all the info I can for ref and future jobs.
Would you happen to know the bleeder size for the front and clutch slave?

[nolastyankee]

David,
When I wrote the above response to Jim the body wasn't on our car so I could easily get at the rear brakes to measure the thread pitch on the bleeders. The rear brakes are still pretty easy to get at in the rear wheel well.

The front end of our car is different so my bleeder specs wouldn't help you. Sorry!

[JerryBP]

Jaguar is a British Co. (owned by Ford at present)
Folow this link, http://www.britishfasteners.com/images/catalog.pdf
maybe it will help.

After we had fought a war to get out from under British rule we couldn't adopt anything of theirs so we had to came up with our own bolt and thred system. (why couldn't we have just went with the metric system then?)

[davids2toys]

David,
When I wrote the above response to Jim the body wasn't on our car so I could easily get at the rear brakes to measure the thread pitch on the bleeders. The rear brakes are still pretty easy to get at in the rear wheel well.

The front end of our car is different so my bleeder specs wouldn't help you. Sorry!

Thanks Brian, my front brakes and hub say JFZ all over them?

[davids2toys]

Jaguar is a British Co. (owned by Ford at present)
Folow this link, http://www.britishfasteners.com/images/catalog.pdf
maybe it will help.

After we had fought a war to get out from under British rule we couldn't adopt anything of theirs so we had to came up with our own bolt and thred system. (why couldn't we have just went with the metric system then?)
Thanks Jerry..are the english or Jaguar SAE or metric:confused:

[davids2toys]

Just read thru the pdf file...are all the fasteners on our cobra this English type, if no, then what are they?

[pgermond]

Just read thru the pdf file...are all the fasteners on our cobra this English type, if no, then what are they?

Only the jag components have the metric fittings. As for the rest.... it's all American (SAE) :)

[davids2toys]

Only the jag components have the metric fittings. As for the rest.... it's all American (SAE) :)

Are the jag components metric or that other stuff(whitworth)?

I have JFZ brake components on the front, I was trying to bleed all the brakes today...the fronts gave me problems, the bleeders were way to tight IMO, also would not work. i removed them, they were 7/16 hex, not 3/8, also, the thread appeared to be different than any of the taps I own, seemed close to 10 metric, and very fine threads. I think I need new bleeders, anybody have a clue of the proper bleeder for this setup?
I actually bled them buy turning the bleeder outb until the fluid came out of the threads, and I was using a peddle pusher!

[pgermond]

beer goggles? :D

[JerryBP]

IT depends when your Jag parts were made, Pryor to Ford taking over Jag they were all Whitworth threads (mostly 26tpi) but after Ford started supplying parts around 1985 a lot of the threads are US SAE but now they are changing to Metric.

If your rear Jag Caliper has a G (like attached picture) molded into it, It was made by Girling and the bleeder can be either 7/16 or 3/8 x 24tpi (unless someone has drilled it out and rethreaded it) Jerry

[davids2toys]

IT depends when your Jag parts were made, Pryor to Ford taking over Jag they were all Whitworth threads (mostly 26tpi) but after Ford started supplying parts around 1985 a lot of the threads are US SAE but now they are changing to Metric.

If your rear Jag Caliper has a G (like attached picture) molded into it, It was made by Girling and the bleeder can be either 7/16 or 3/8 x 24tpi (unless someone has drilled it out and rethreaded it) Jerry

Yes, I think it vdoes have a G on the calipers, I will check and take note when I get home today...Thanks Jerry!
Happen to have any info on my front JFZ brake setup?

[JerryBP]

JFZ Racing brakes were comon in the 70's & 80's, a lot of open wheel cars ran them and also some sportscars racers I think they were aquired by Sierra Racing products. As far as I know the were always American made so they are probably 7/16" SAE threads.
Sierra ( http://sierraracing.com/cgi-bin/listitem2.pl?file=specials ) look about half way down the page and see if these are your calipers.

[davids2toys]

JFZ Racing brakes were comon in the 70's & 80's, a lot of open wheel cars ran them and also some sportscars racers I think they were aquired by Sierra Racing products. As far as I know the were always American made so they are probably 7/16" SAE threads.
Sierra ( http://sierraracing.com/cgi-bin/listitem2.pl?file=specials ) look about half way down the page and see if these are your calipers.

Thanks Jerry, I appeciate it...I will call them!

[davids2toys]

JFZ Racing brakes were comon in the 70's & 80's, a lot of open wheel cars ran them and also some sportscars racers I think they were aquired by Sierra Racing products. As far as I know the were always American made so they are probably 7/16" SAE threads.
Sierra ( http://sierraracing.com/cgi-bin/listitem2.pl?file=specials ) look about half way down the page and see if these are your calipers.

If you mean this

DO YOU HAVE OLD JFZ CALIPERS?


http://sierraracing.com/data1/jfz.jpeg
When was the last time that you replaced the o'rings?

Do you need a new crossover tube?
Bleed screw assembly?

We have replacement parts
and offer repair service on
JFZ calipers

Don't hesitate to call us for a quote based on your caliper model!


Yes, these look like mine...thanks again

[davids2toys]

Thanks Jerry, I appeciate it...I will call them!
Well I called and got quite the education about my front brakes,deflection, hub,lugs , calipers, 4 bleeders...man did I do this all wrong, this cobra I bought is nothing at all like any car I 've owned in the past!!!
This winter I will rip it all apart, re-seal the calipers, do some measuring that he told me to do, and get everything up to snuff.
Would you know the bleeding order if you have 2 bleeders per caliper?

[Naumoff]

The Wilwood's have four bleeders per caliper. :)

David,
Couldn't you clean the bleeders out?

[davids2toys]

I did not know the bleeders were in 2 sections, I was trying to crack the whole body of the bleeder using a 7/16 wrench, I needed to use a 1/4 wrench and open the top section only.

I did not even see or bleed the outside bleeders! I guess the wheels need to be off to do this job correctly!
The backs bled no problem.

[Naumoff]

I did not know the bleeders were in 2 sections, I was trying to crack the whole body of the bleeder using a 7/16 wrench, I needed to use a 1/4 wrench and open the top section only.

I did not even see or bleed the outside bleeders! I guess the wheels need to be off to do this job correctly!
The backs bled no problem.

That is usually a given for disc brakes. Sorry for your troubles. It makes it a 100 times easier to get to everything and inspect the rotor and caliper.

[davids2toys]

That is usually a given for disc brakes. Sorry for your troubles. It makes it a 100 times easier to get to everything and inspect the rotor and caliper.


Yes, with a cobra, probably true, or doing more than just bleeding them...but for just bleeding I have never removed the wheel. Lesson learned...lol
thanks Tony