The Classic Opel Forums  

Go Back   The Classic Opel Forums > Technical Forums > The Main Tech Forums > Group 5 - Brakes
Home Opel Groups Calendar Members Map FAQ eBay Search

Group 5 - Brakes Disc, Drum

Reply
 
LinkBack Thread Tools Display Modes
Old 07-07-2008   #1 (permalink)
Opel Key Master
 
opelspyder's Avatar
 
Join Date: Mar 2002
Location: Tennessee
Posts: 1,301
opelspyder is on a distinguished road
Provided Answers: 4
Unanswered: Caliper sizes???

Okay, starting to wonder how many caliper piston sizes Opel used on US imported cars. I count 4 now

1 Manta 75 models and 1900s
2 GT
3 Kadett 1.9 and GT 1.1
4 Kadett 66-67

Are there any others? The 66-67 measured slightly smaller than the later 1.1 and Kadett 1.9 pistons, from NOS parts I've had, but now really wondering.
Keith
__________________
Questions or comments to the Project: Restoration of a GT series 2 -post here http://www.opelgt.com/forums/opel-gt...eries-2-a.html
opelspyder is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in Technorati
Reply With Quote Top home
Old 07-07-2008   #2 (permalink)
Have Opel, Will Travel
 
oldopelguy's Avatar
 
Join Date: Mar 2002
Location: Saint Michael, MN
Posts: 1,727
Logbook Entries: 3
oldopelguy is on a distinguished road
Provided Answers: 2
From my experience:

The Kadett 1.1L caliper is the same as the GT 1.1l caliper and is smaller in diameter than the 1.9L calipers.

The Kadett 1.9L caliper is the same diameter as the GT 1.9L caliper which is the same diameter as the 1900/Ascona/Mantas.

The early Kadett B used a smaller diameter caliper that doesn't directly interchange with the rest.
__________________
1958 Rekord Sedan, 1958 Olympia Wagon, 1959 Opel Olympia Sedan, 1967 Kadett Coupe, 1967 Admiral Sedan 4L CIH-6, 1968 Kadett fastback 1.1L, 1970 Kadett Wagon Turbo 2.2L, 1971 Kadett Sedan 1.1L, 1975 Manta Wagon 4.3L V-6
oldopelguy is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in Technorati
Reply With Quote Top home


Old 07-07-2008   #3 (permalink)
Opel Key Master
 
opelspyder's Avatar
 
Join Date: Mar 2002
Location: Tennessee
Posts: 1,301
opelspyder is on a distinguished road
Provided Answers: 4
Kadett Calipers

I assumed the Kadett 1.9 Calipers were the same as a GT with 1.9 as well. But guess what, they are NOT!!!!! Found out the hard way this weekend when I started disassembly of them. Turns out they are the same part number as a 1.1 GT, as my new seal kits were way too big. I will put the GT ones on it due to the seals I ordered. But you might want to check again as well. I am learning quickly that the Kadett and the GT share less and less in common.
Keith
__________________
Questions or comments to the Project: Restoration of a GT series 2 -post here http://www.opelgt.com/forums/opel-gt...eries-2-a.html
opelspyder is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in Technorati
Reply With Quote Top home


Old 12-14-2008   #4 (permalink)
Senior Contributor
 
Killer Texas GT's Avatar
 
Join Date: Jan 2003
Location: Leonard, Texas
Posts: 888
Killer Texas GT is on a distinguished road
Provided Answers: 1
The "Piston" diameter for the 1.9 Kadett, GT, Manta and Ascona (including the 75"big brake) is 48mm. The "Piston" diameter for the 1.1 Kadett and GT is 44 mm.
The 1.1 calipers are also smaller in physical size and mounting bolt pattern compared to the 1.9s. The "75 big brake" is larger in physical size than the typical brake caliper from a 1.9, but has the same bolt pattern mounting.
__________________
rk

68 Kadett 2 Dr 1.1 SR/Rallye Suspension
68 Kadett Rallye 1.9/4 Spd & AC
69 GT 1.9/4 Spd
70 GT 1.9/5 Spd,87 Impulse PB/MC/4 wheel 10.5" vented Disc/complete suspension/power assist & tilt wheel steering
71 Kadett 2 Dr 1.1/4 Spd/4 wheel drum brakes(project:to a 1.9 FI/Auto 75 Big Brakes/Impulse vented rr Disc, Factory AC from Buick/Opel by Isuzu
72 GT 1.9 FI/Auto 75 Big Brakes/Impulse vented rr Disc
73 Manta Rallye
75 Ascona 1.9 FI/5 Spd/Impulse rr Disc brakes
OPEL WERKS

Last edited by kwilford; 12-14-2008 at 12:13 PM.
Killer Texas GT is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in Technorati
Reply With Quote Top home


Old 12-14-2008   #5 (permalink)
Member
 
Gordy's Avatar
 
Join Date: Mar 2002
Location: Loves Park, IL (Rockford area)
Posts: 805
Gordy is on a distinguished road
I went to the Tire Rack and just ordered the proper rotors for the 1975 brake set up so there should be no issues. They've got a good selection of Koni and KYB shocks as well. Ordered the calipers from Rock Auto at $45 each.
Gordy is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in Technorati
Reply With Quote Top home


Old 12-14-2008   #6 (permalink)
Über OpelGT.com Moderator
 
kwilford's Avatar
 
Join Date: Mar 2002
Location: Calgary, Alberta, Canada
Posts: 4,087
Real Name: Keith Wilford
kwilford is on a distinguished road
Provided Answers: 4
Originally Posted by Gordy View Post
I went to the Tire Rack and just ordered the proper rotors for the 1975 brake set up so there should be no issues. They've got a good selection of Koni and KYB shocks as well. Ordered the calipers from Rock Auto at $45 each.
The posts on upgrading to larger rotors were off-topic, so I split them off to
http://www.opelgt.com/forums/perform...tml#post180258
__________________
Keith Wilford
working on my '71 GT and '75 SportWagon
kwilford is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in Technorati
Reply With Quote Top home


Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 05:22 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.3.0
Clubs, Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
1998-2009 OpelGT.com - OpelGT .com is not affiliated with General Motors Corp. or it's Adam Opel Division.