OEM brake hard lines are not standard size

Dfbpurcell · 06-19-2024, 05:25 AM

I need to reflare and replace a flare nut on one of my brake hard lines. Due to the black coating, BMW brake hard lines are thicker than the standard 3/16. I tried a few different brands of flare nuts but they obviously do not fit.

What is the correct way to approach this? Drill out the flare nut? Can't seem to find a BMW specific flare nut with the larger inner diameter.

Yngvejos · 06-26-2024, 11:13 AM

Standard flare nuts fits if you remove the paint from the OEM brake line.

06-19-2024, 05:25 AM	#1
Dfbpurcell Private 17 Rep 77 Posts Drives: E90 335i N54 Join Date: Jan 2022 Location: NZ iTrader: (0)	OEM brake hard lines are not standard size I need to reflare and replace a flare nut on one of my brake hard lines. Due to the black coating, BMW brake hard lines are thicker than the standard 3/16. I tried a few different brands of flare nuts but they obviously do not fit. What is the correct way to approach this? Drill out the flare nut? Can't seem to find a BMW specific flare nut with the larger inner diameter.
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06-26-2024, 11:13 AM	#2
Yngvejos Private First Class 57 Rep 151 Posts Drives: E91 325i, E87 118d Join Date: Mar 2012 Location: Norway iTrader: (0)	Standard flare nuts fits if you remove the paint from the OEM brake line.
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