[Fot] Brake Caliper Replacement Parts

[Kramer, Robert]

I had forgotten that many people choose to run without the dust seals. I may
have to go that way. I definitely try to avoid suspect rubber parts but like
others have said there is no guarantee that a Lucas/Girling box means
anything. My vintage organization won't allow Toyota conversions but I suppose
they wouldn't know. I prefer keeping it original anyway. Larry Young thinks
the early/larger TR4 calipers work better, both in cooling and in brake
surface area. Now that I have a an early TR4 and a 4A I can compare. I just
let mine go too long.

Bob Kramer
Sales Manager
RDO Equipment Company
16415 N. IH 35
Pflugerville, TX 78660
512-272-4141

-----Original Message-----
From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On Behalf
Of N197TR4 at cs.com
Sent: Thursday, March 11, 2010 10:56 AM
To: timmurph at fastbytes.com; jerryvv at roadrunner.com; rkramer3 at austin.rr.com
Cc: fot at autox.team.net
Subject: [Fot] Brake Caliper Replacement Parts

Does the current state of parts quality in brake parts promote an argument
for Toyota Conversions? Then it becomes an issue of safety rather than
performance.

I think I also came across a story of some aftermarket brake pistons
(steel, stainless steel, chromed?) with a small sharp edge that cut the
embedded
seals.

Leaky systems with new parts doesnt sound very good.

It can say Lucas or Girling on the box, but I suspect that that they might
still be substandard. And perhaps we need to look at the pistons under a
magnifying glass for very small sharp machined edges or burrs.

We have been having more issues with seals not lasting in the TR4...I
suspect we need to go back and look more closely at the components, but what
do
you do with substandard seals?

I know that Jack went back and forth on the Toyota conversions, but I cant
remember the details. His final answer was to use the Toyotas and it wasnt a
performance related issue, I dont think.

Important thread. Thanks.

I am not trying to make an argument for Toyota conversions, btw....just
making observations.

Joe A


> Good point.  I had a discussion with Jack Drews regarding the seals from
> Moss and he questioned whether or not they were the same "type" as the
> original because they only seemed to last about one or maybe two seasons.
> We've had the same problem.  I put stainless steel pistons in but we get
> the
> seals "weeping" when the car stands for any amount of time, ultimately
> draining all the brake fluid out, like over winter.  Under pressure they
> seem to be sealing just fine, the level stays up in the reservoir during a
> weekends event.  We may have to add some fluid due to pad wear (we have the
> small style master on the front and back of a dual master system) during a
> weekend but that's all.  I did notice some unusual "staining" on the
> stainless pistons when we changed the seals last year.  Doesn't look like
> actual scoring.  Anybody else seen this with the stainless pistons?  I can
> e-mail photos, which don't really do a good job of showing what it looks
> like, if anyone is interested.
>
> Tim
>

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