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V1 Wrong size flare nut on rear of center tunnel brake line?

neodied

Well-Known Member
neodied
I think my center tunnel brake line may have come with the wrong flare nut size on the rear end.
TunnelBrakeLine_vs_OtherLine_Annotated.jpg

When I try to attach one of the brass tees, it will not even start into any of the holes.
TunnelBrakeLineRearNut_BrassTee.jpg

Both of the flare nuts on the long brake line fit the larger, left port on the brake master cylinder, not the smaller right side port. (I know they don't both go in the MC, this is just comparison)
BrakeMasterCylinder.jpg

As far as I can tell, the two brass tees have all identical threaded holes and this larger nut will not fit any of them. At 1:17 of "Installing the Rear Brake Lines and Clutch Line", I got this screenshot which looks more like the smaller nut.
YT_TunnelBrakeLineRearNut.jpg
 
Last edited:
neodied
I think my course of action for this might be to take the line to a local brake shop and have them cut off and replace the tube nut by matching to the smaller size and re-flare the tube end. It doesn't seem that this would shorten the brake line by much so everything should still connect up with a little finagling.
 
neodied
I would email [email protected] if you haven't already. They will make right, anything that is wrong, and it won't cost you a cent.
I agree, I have great faith that they would do whatever they could to assist. However, I am on vacation this week and I was planning to bust out all of Stage 1 assembly before Monday rolls around so I think I will have to go with a local solution to keep my momentum going. At this point what I need is either the correct tube nut in hand or at least the specs/Part# to match threads and contact surface. I'll email Support and see if I can get that info.
 
Rttoys
You could do it at home. Get already flared line with the proper fitting and correct size union. Cut the goblin line back a few inches. Cut the pre flared line accordingly and join them with a union.
 
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