An actual car post...
in [Toyota]
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From: hls on 21 Oct 2009 15:08 "Tegger" <invalid(a)invalid.inv> wrote in message >> I would emery cloth the pistons and cylinders, > > > I would not. Run your fingernail down a brand-new piston. Does it hang > up or catch anywhere? No. Now run your fingernail down a surface that's > been emeried even with fine cloth. /Big/ difference. Any roughness will > result in a sticky piston, plus it will wear the hydraulic seal very > quickly. Emerying the cylinder bore is somewhat less objectionable, > provided it's cleaned thoroughly afterwards. > > Clean off any gum on the pistons with solvent. If rust remains or if the > cleaned surface catches your fingernail anywhere, replace the piston. > Tegger I should have said "crocus cloth" rather than emery. Sorry. Crocus cloth will polish and does a great job of cleaning up microabrasive surfaces. It is perfectly safe to use on cylinders or pistons. Sorry I missed the point that his drain was on a rear caliper. Doesnt make much difference, actually. I have redone rears as well as fronts. They ARE different, but not that complicated.
From: hls on 21 Oct 2009 15:12 "Vic Smith" <thismailautodeleted(a)comcast.net> wrote in message news:a9ovc599rv1ef0qh3cop2bf7lnv82r5029(a)4ax.com... > On Fri, 9 Oct 2009 18:53:11 -0500, "hls" <hls(a)nospam.nix> wrote: > Since it's rear shoes it's a wheel cylinder. Cheap to replace. > But I've sometimes just bled at the line connection instead, and > had no sponginess. And people define sponginess differently. > Sometimes it's normal pedal travel. > But it's his car, so he knows how it should feel. > > --Vic If it is rear shoes, I totally agree with you. If it is rear discs, then you have to make a decision. Rear discs are not so hard to work on, but if you snap off a bleed valve, you may be committed to buying a new caliper. Yes, a good machine shop MIGHT be able to get the old one out, but the expense can overpower just getting a junkyard unit and rebuilding (as I did), or even buying new.
From: hls on 21 Oct 2009 15:16 "dsi1" <dsi1(a)spamnet.com> wrote in message news:0oKAm.2715 > Sure, I know what you mean. It took the rest of the world a while to put > out a twin-cam engine with a flat toothed belt timing belt. > > I suspect that Subaru and other manufacturers might pay Fiat some cash for > license to use that parking brake design for disk systems. VW and Volvo > and probably others used Fiat's wonderful system of flat shims to adjust > valve clearances - they were all interchangeable. What I meant is that > it's odd because most other folks don't think much of Fiat. Fiat had a lot of interesting technology. I thought those flat shims were super. I had a problem with one head once that I could not get into spec with any existing shims. Had to do a little "machining".. Fiat doesnt have a good name, really. I think the classic rusting problem is one issue. It isnt the worst car in the world.
From: Hachiroku ハチロク on 21 Oct 2009 18:35 On Wed, 21 Oct 2009 14:08:04 -0500, hls wrote: > > "Tegger" <invalid(a)invalid.inv> wrote in message >> I would emery cloth the > pistons and cylinders, >> >> >> I would not. Run your fingernail down a brand-new piston. Does it hang >> up or catch anywhere? No. Now run your fingernail down a surface that's >> been emeried even with fine cloth. /Big/ difference. Any roughness will >> result in a sticky piston, plus it will wear the hydraulic seal very >> quickly. Emerying the cylinder bore is somewhat less objectionable, >> provided it's cleaned thoroughly afterwards. >> >> Clean off any gum on the pistons with solvent. If rust remains or if the >> cleaned surface catches your fingernail anywhere, replace the piston. >> Tegger > > I should have said "crocus cloth" rather than emery. Sorry. Crocus cloth > will polish and does a great job of cleaning up microabrasive surfaces. It > is perfectly safe to use on cylinders or pistons. > > Sorry I missed the point that his drain was on a rear caliper. Doesnt > make much difference, actually. I have redone rears as well as fronts. > They ARE different, but not that complicated. Actually, rear drum backing plate. I got it loose with Heat Riser lube and...Vise-Grips. All bled, all working. Sort of. I'm used to a Supra and a Scion. Much less pedal pressure required...
From: Tegger on 21 Oct 2009 20:20
=?iso-2022-jp?q?Hachiroku_=1B$B%O%A%m%=2F=1B=28B?= <Trueno(a)e86.GTS> wrote in news:pan.2009.10.21.22.35.26.574934(a)e86.GTS: > > I got it loose with Heat Riser lube and...Vise-Grips. No duct tape? For shame. > > All bled, all working. Sort of. I'm used to a Supra and a Scion. Much > less pedal pressure required... > Try a 1974 Chev Nova with unassisted drums all around... -- Tegger |