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MG MGA - master cylinder sleeve - cracked?
|has anyone had this happen to them???|
I had my master cylinder resleeved about 6 years ago ( apple hydr. )and it started leaking a "little " the first year,I'm using DOT 5 so I figured I'd have to live with it, but it's gotten worse so I decided to put a rebuild kit in it. after disassembly I honed the cylinders with 220 then 400 grit stones, and I noticed what I thought was a long scratch on the brake side sleeve, more honing didn't remove it, looking closer I think it is a crack. is this possible? it doesn't run the entire length just about 2 1/2" in the center, seems to stop about 1" from the front.
any info is appreciated.
|Reading here over the years, the company doesn't have a very good reputation for long lasting or leak-free results, but maybe it's just a minority that have that probem . |
What is wrong with a brand new cylinder - is your life really not worth the extra dollars to have brakes you can trust to stay working ??????
It would be very surprising if a sleeve pressed into a MC body cracked. IMHO this would have to happen befor or during installation. I'd be tempted to contact the folks at Apple about this to see what they have to say.
|G T Foster|
As I remember Apple recommends against DOT 5. Apparently there is a possibility of leakage along the sleeve (?) with the DOT 5 fluid.
The line in the sleeve MIGHT be a weld seam if the tubing they used is manufactured from flat sheet by welding.
Please let us know the outcome. I am about to put in DOT 5 but I do have a new MC and rear slaves. Will rebuild the front (B) calipers before filling.
|Apple says not to use silicon fluid in brass sleeved cylinders. Silicon should only be used with stainless sleeves.|
For what it's worth, I have been using a brass sleeved unit from Apple with DOT 3 for a couple years now and have had zero problems.
|Mark J Michalak|
|I had the M/C on my 59 sleeved in brass (not by Apple) and converted to Silicon fluid, not having been advised otherwise. Working fine 2 years later. I'd be interested in any supporting rationale for not using Dot 5 with brass since I can't think of a reason if the sleeving is properly done.|
I took my MC to a friend with a 10X scope and he thinks it's a scratch not a break so I'm going to hone it some more to try to remove it
I'm thinking I may go with a new MC if this rebuild still leaks when I'm done.
Is your new MC from Moss?
is it the Lucas-TRW with the flat plate top?
if it is does the original raised top fit on it ok?
This thread was discussed between 29/08/2007 and 05/09/2007
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