More Problems with Caliper Rebuild
03-01-2011, 09:39 PM
#1
Pro
Thread Starter
Join Date: Oct 2007
Location: Maryland
Posts: 737
Likes: 0
Received 0 Likes
on
0 Posts
More Problems with Caliper Rebuild
A fellow Rennlister turned me onto Zeckhausen Racing for caliper rebuild parts (good service). However, when I ordered their 30mm and 28mm Brembo seals for the rebuild of my '88 rear calipers I got a different style seals. So here's the same question everyone asks... are the seals for this caliper available???
Last edited by kccampro; 03-02-2011 at 09:16 PM.
03-02-2011, 02:48 PM
#3
What year is your caliper? The pistons usually have lips on the end for the outside seal.
03-02-2011, 06:54 PM
#5
Ah. Is there a picture of the caliper you can show?
03-02-2011, 06:55 PM
#6
I may need to do early set as well, so I am listening
Trending Topics
03-02-2011, 07:18 PM
#10
Supercharged
Rennlist Member
Rennlist Member
Join Date: May 2002
Location: Back in Michigan - Full time!
Posts: 18,925
Likes: 0
Received 60 Likes
on
34 Posts
I'm sure I've seen it too, I just can't remember that I've seen it, so I don't know where to go and find it. The days when I had idle time to casually look through those CD's is long gone - btw, I now keep the entire cd collection on my flashdrive these days, so it's usually close at hand. 
03-02-2011, 09:18 PM
#11
Pro
Thread Starter
Join Date: Oct 2007
Location: Maryland
Posts: 737
Likes: 0
Received 0 Likes
on
0 Posts
A picture of the caliper has been added in post #1. Also, here's the info I've gotten back from Zeckhausen Racing:
"I see what's going on here. (Thanks for the photo, by the way!). Your calipers are using the old scraper-ring style boots, rather than the "modern" rubber dust boots. That's why your pistons look the way they do, with no groove cut in them to accept the rubber or silicon boots. The pressure seals should work just fine, but the dust boots will not. By the way, the proper terminology (so we're all speaking the same language) is that the high pressure seals that go deep into the caliper cylinder bore are called "pressure seals". These keep the brake fluid from leaking past the piston. The scraper rings on your caliper serve the function of keeping the pistons clean and preventing crud from reaching inside and scoring the cylinder walls or damaging the pressure seals. The modern calipers use a rubber dust boot to serve the same function, clipping the inner diameter to the groove in the piston and pressing the outer diameter into a recession in the caliper body. I'm not sure where to acquire new scraper rings."
"I see what's going on here. (Thanks for the photo, by the way!). Your calipers are using the old scraper-ring style boots, rather than the "modern" rubber dust boots. That's why your pistons look the way they do, with no groove cut in them to accept the rubber or silicon boots. The pressure seals should work just fine, but the dust boots will not. By the way, the proper terminology (so we're all speaking the same language) is that the high pressure seals that go deep into the caliper cylinder bore are called "pressure seals". These keep the brake fluid from leaking past the piston. The scraper rings on your caliper serve the function of keeping the pistons clean and preventing crud from reaching inside and scoring the cylinder walls or damaging the pressure seals. The modern calipers use a rubber dust boot to serve the same function, clipping the inner diameter to the groove in the piston and pressing the outer diameter into a recession in the caliper body. I'm not sure where to acquire new scraper rings."
03-02-2011, 10:19 PM
#12
Three Wheelin'
I had the same problem with my 88 caliper, apparently the only way you can get the scraper style rings, you have to get the whole rebuilt kit that has the piston in it, which is from $50 to $60 per piston depending on size.
Some have actually suggested that you can use the 89+ kit that also comes with the grooved pistons, the kit is cheaper, last I check from $17 to $30 per piston depending on the diameter.
I end up buying the later style calipers, so I don't know if the later style kit will work on the earlier calipers.
Some have actually suggested that you can use the 89+ kit that also comes with the grooved pistons, the kit is cheaper, last I check from $17 to $30 per piston depending on the diameter.
I end up buying the later style calipers, so I don't know if the later style kit will work on the earlier calipers.
03-04-2011, 08:00 PM
#15
Well, this is a problem.