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MOSS Replacement master cylinder

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J

jgoss

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Can anyone tell me the correct fitting and flare for the Master Cylinder (180-670) Moss sells for Spridgets?
I have replaced mine and am having trouble with both fittings leaking at the master cylinder.
Is the flare the Bubble?

Thanks in advance!

jgoss
 
Gerard

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Tandem master cylinder for 948 Sprite is a bubble flare. You're using for drum or disc?
 
DrEntropy

DrEntropy

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Disc or drum shouldn't make a difference to the flare fitting at the M/C. Pressure is pressure, a seal is a seal.

Are the lines new? How were the flares made?

Reason I ask is: when the flare is made, particular attention should be made to relieve any stress riser points on the tubing end before squeezing the flare or it will hair-line split. Smoothing the end on O.D. with fine wet-or-dry and I.D. a fine round "Swiss file" to eliminate any rough, sharp or irregular edge.
 
Gerard

Gerard

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I didn't say or imply it made a difference. Just asking.
 
DrEntropy

DrEntropy

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Gerard said:
I didn't say or imply it made a difference. Just asking.
Click to expand...

Gerard, I wasn't bein' snarky, please don't interpret it as such. Just that it seemed incongruous to have the two details tied together.
 
Gerard

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DrEntropy said:
Gerard said:
I didn't say or imply it made a difference. Just asking.
Click to expand...

Gerard, I wasn't bein' snarky, please don't interpret it as such. Just that it seemed incongruous to have the two details tied together.
Click to expand...

OK, cool... thanks for the clarification. Easy to misconstrue stuff sometimes.
 
Gerard

Gerard

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jgoss said:
It's disc.
The lines are old. Don't know about original. They did not leak on the old MC.
Thanks for that.
I am thinking about replacing them. Want to make sure I form the flares right.

Great post here on doing it:
https://www.mgexperience.net/phorum/read.php?3,1318708
Gerard I think you are on there.
Thanks again!
jg
Click to expand...

Yes, I am on MGE too. If you have not seen my disc brake upgrade info page, you may want to review it here:

https://gerardsgarage.com/Garage/Tech/DbrakeUg.htm
 
Bayless

Bayless

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Thanks for the link Gerard. Very informative.
 
HAN8L1965

HAN8L1965

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I had my master cylinder re-done by white post and I had all new stainless lines made. The only leaks I had were at the master cylinder. I finally really cranked them down and that was the end of the leaking.

Mark
 
TraceZ

TraceZ

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What tool are you guys using to access the flare nuts on the MC? I had to modify a crowfoot flare wrench to fit in that tight space.
 
B

Billm

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The 6-point crowfoot that hooks onto a socket extension works best for me.
I just saw a complete set of them at Harbor Freight for about $11.00 - the 5/8" one works really well on the temp gauge bulb on the engine head too!
BillM
 
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