Lotus Elan

Break Master Cylinder Tandem - Repair

PostPost by: hastu » Thu Jan 18, 2024 4:26 pm

On my 2S 130 the Reservoir on the Break Master Cylinder leaks on the not screwed side.
The Master Cylinder is a tandem Version
At Kelvedon they sell Seal Kits for 0,7, 3/4 and 5/8 but i dont know which Version my Master Cylinder is.
Any ideas?
SJ Sportscars sell a complete Tandem Master Cylinder do you think its a safer way to get an non leaking Cylinder.
Thank you for every input
Attachments
IMG_6897.JPG and
Hanspeter
Elan +2 S130 1971 Pistachio Lime Green
User avatar
hastu
Second Gear
Second Gear
 
Posts: 55
Joined: 06 Jan 2022
Location: Schweiz

PostPost by: nmauduit » Thu Jan 18, 2024 5:24 pm

if not seen already you may want to give a glance at one of the former threads on the topic :

https://lotuselan.net/forums/viewtopic.php?f=42&t=38218

swapping the master cylinder may require more work then initially anticipated, esp. if the ports are not on the same side as the original part.
S4SE 36/8198
User avatar
nmauduit
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2031
Joined: 02 Sep 2013
Location: France

PostPost by: h20hamelan » Thu Jan 18, 2024 6:46 pm

brake fluid is hydroscopic, and many parts can be affected.
maybe this is why yours is leaking, and cheap insurance, also, the difficulty of changing them
Born, and brought home from the hospital (no seat belt (wtf)) in a baby!
Find out where the limits are, and start from there
Love your Mother
Earth
User avatar
h20hamelan
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1866
Joined: 25 Sep 2010
Location: RACECAR spelled backward, is——RACECAR! Kayak, Kayak. The Faster You Drive...The Slower You Age

PostPost by: 2cams70 » Thu Jan 18, 2024 10:01 pm

Definitely do not get a replacement master cylinder unless yours shows corrosion in the bore. With regards to the size you need - just measure it. Original is best.
1970 Ford Escort Twin Cam
1972 Ford Escort GT1600 Twin Cam
1980 Ford Escort 2.0 Ghia
Peugeot 505 GTI Wagons (5spdx1) (Autox1)
2022 Ford Fiesta ST.
2cams70
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2008
Joined: 10 Jun 2015
Location: Australia

PostPost by: M100 » Fri Jan 19, 2024 11:27 am

hastu wrote:SJ Sportscars sell a complete Tandem Master Cylinder


Do they? I can’t see anything except one on an exchange basis

https://www.sjsportscars.com/parts-and-accessories/X050J6040W.htm
Martin
72 Sprint DHC
User avatar
M100
Fourth Gear
Fourth Gear
 
Posts: 760
Joined: 16 Sep 2003
Location: Yorkshire

PostPost by: hastu » Fri Jan 19, 2024 1:12 pm

Thank you Guys, your Inputs helped me. i ordered now a seal kit and will try to fix it
Hanspeter
Elan +2 S130 1971 Pistachio Lime Green
User avatar
hastu
Second Gear
Second Gear
 
Posts: 55
Joined: 06 Jan 2022
Location: Schweiz

PostPost by: nmauduit » Fri Jan 19, 2024 2:17 pm

hastu wrote:Thank you Guys, your Inputs helped me. i ordered now a seal kit and will try to fix it


please let us know if the kit you obtained contains the front ("not screwd" end) reservoir seal, this was rarely the case a few years ago (hence my recourse to stacked o-rings)...
S4SE 36/8198
User avatar
nmauduit
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2031
Joined: 02 Sep 2013
Location: France

PostPost by: 2cams70 » Sat Jan 20, 2024 7:19 am

nmauduit wrote:please let us know if the kit you obtained contains the front ("not screwd" end) reservoir seal, this was rarely the case a few years ago (hence my recourse to stacked o-rings)...


That Girling tandem master cylinder was used on quite a few makes and models other than Elan. Ford Escort Mk1 included. I'm not sure if the bore size is the same on the Elan but could check if someone has the data. The Ford Escort kit has that square section reservoir seal. The kits also used to contain the tilt valve although I'm not sure if that's the case (you need to remove it before you can extract the piston - requires a large Allen key).

https://www.ebay.com/itm/223229177044
1970 Ford Escort Twin Cam
1972 Ford Escort GT1600 Twin Cam
1980 Ford Escort 2.0 Ghia
Peugeot 505 GTI Wagons (5spdx1) (Autox1)
2022 Ford Fiesta ST.
2cams70
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2008
Joined: 10 Jun 2015
Location: Australia

PostPost by: h20hamelan » Sat Jan 20, 2024 8:12 pm

As I dont know, I shall ask.
Why not new 2cams please.

Outside of the cylinder bore, the pushrods on the 4 that I have are all corroded. This is where the leaking is.
Born, and brought home from the hospital (no seat belt (wtf)) in a baby!
Find out where the limits are, and start from there
Love your Mother
Earth
User avatar
h20hamelan
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1866
Joined: 25 Sep 2010
Location: RACECAR spelled backward, is——RACECAR! Kayak, Kayak. The Faster You Drive...The Slower You Age

PostPost by: 2cams70 » Sat Jan 20, 2024 9:58 pm

h20hamelan wrote:As I dont know, I shall ask.
Why not new 2cams please.

Outside of the cylinder bore, the pushrods on the 4 that I have are all corroded. This is where the leaking is.


Pushrod or piston? Rarely is there corrosion on the piston unless of course the cylinder has been left sitting with brake fluid in it and not used. Never store or let a brake component sit with fluid in it and always use rubber grease not brake fluid during assembly.
1970 Ford Escort Twin Cam
1972 Ford Escort GT1600 Twin Cam
1980 Ford Escort 2.0 Ghia
Peugeot 505 GTI Wagons (5spdx1) (Autox1)
2022 Ford Fiesta ST.
2cams70
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2008
Joined: 10 Jun 2015
Location: Australia

PostPost by: h20hamelan » Sat Jan 20, 2024 10:44 pm

The rod itself
Maybe its canada
I wonder if some beake fluid leaked past the main seal in the cylinder, and got trapped between the outer seal. This corroded the shaft/pushrod and in turn ate up the main
Born, and brought home from the hospital (no seat belt (wtf)) in a baby!
Find out where the limits are, and start from there
Love your Mother
Earth
User avatar
h20hamelan
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1866
Joined: 25 Sep 2010
Location: RACECAR spelled backward, is——RACECAR! Kayak, Kayak. The Faster You Drive...The Slower You Age

PostPost by: hastu » Sat Jan 27, 2024 4:25 pm

I now received the Master Cylinder Seal Kit from SJ Sportscars X050J6041Z, and you can see the parts on the attached picture. Actually i dont know if the Kit contains the front ("not screwd" end) reservoir seal. I will try to put the things together in the next days
Attachments
IMG_6926.JPG and
SJSPORTSCARS Master Cyl Seal Kit X050J6041Z
Hanspeter
Elan +2 S130 1971 Pistachio Lime Green
User avatar
hastu
Second Gear
Second Gear
 
Posts: 55
Joined: 06 Jan 2022
Location: Schweiz

Total Online:

Users browsing this forum: No registered users and 14 guests