Jump to content
The mkiv Supra Owners Club

Replacing rear Jspac caliper


a98pmalcolm
 Share

Recommended Posts

Two 14 mm head size bolts hold the calipers to the sliding pins. A 14 mm head size banjo bolt holds the fluid pipe union to the back of the calipers. A 10 mm head size bleed nipple is used to bleed the calipers. Dozens of J-Spec calipers are scrapped because people over tighten the bleed nipple and split the caliper casting itself. They merely need nipping up!!!! If you make sure the caliper piston is pushed fully into the casting before fitting it will bleed easier and faster and waste less fluid.

Link to comment
Share on other sites

Most true race fluids are DOT 3 or DOT 4. The DOT number is mainly based on water absorption over time. Race fluid gets changed regularly, so water absorption is pretty much irrelevant. they are only interested in dry boiling point. For example, Castrol SRF is an F1 level, top end race fluid, that's VERY expensive, yet is only rated DOT 3 / DOT 4 as it has poor ability not absorbing atmospheric moisture over time, but has a VERY high dry (uncontaminated fluid) boiling point.

Link to comment
Share on other sites

Well went to fit the caliper today and it as the wrong one :( so gotta take it back and wee that they can get ...It seemed the same in the box from non piston side. Look at the difference:

 

http://img52.imageshack.us/img52/4364/20110327002.jpg

 

http://img821.imageshack.us/img821/8523/20110327003.jpg

 

http://img402.imageshack.us/img402/3280/20110327004n.jpg

 

Wonder what caliper its for?

 

P.s: Bleeding went well, 1st time ive doen it. Bought this bleed kit from Halfords for a fiver. Came with the pot, 1 way valve pipe and worked a charm!

Edited by a98pmalcolm (see edit history)
Link to comment
Share on other sites

Just the one caliper scott as this one is sticking mate.

 

Other seems ok, If i get problems i will change the other,thanks for the advice pal :)

 

Test it VERY carefully.

 

You will have one VERY slick and FULLY biting caliper on the rear quarter, vs 3 slightly, sticky slightly gungy, used and worn biting calipers around the other corners.

 

Think about it bud, the rear corner braking harder and faster than the rest of the 3 corners when you are at speed.

 

I'm not saying it will be a problem, just that it could be a VERY serious problem VERY quickly, I don't want to see any "I've binned my car" or worse threads due to not being informed. Tread carefully at first just to make sure :)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.