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Old 12-18-2013, 08:47 AM   #1
aberg83
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Brake Pressure Regulator Help

Trying to reach the pressure regulator to disconnect the main front to back brake hard line. For the life of me, I can't figure out how to get any tools in there to disconnect this fitting. It's too tight. Any tips?
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Old 12-18-2013, 02:58 PM   #2
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you could get brake line crows feet wrenches or socket. you'll most likely need to attack that from underneath. DON'T try it with vise grips or any other or you could potentially strip it and then you're really mucked.

and if you can get some heat in there providing you aren't close to any fuel lines that would certainly help. But use extreme caution if there are.

not recommending it...just making sure you're clear on that. :-)
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Old 12-18-2013, 03:14 PM   #3
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One thought I had since the existing brake line will be replaced is to cut it and slide an 11mm box end over the line and remove the nut from the regulator below working from beneath the engine bay. I could do the same with the new line before securing the other end of it. I'm hoping since the connection is in the engine bay it won't be seized up with rust and should come loose fairly easily, unlike the connections at the rear. Thoughts?

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Old 12-18-2013, 03:28 PM   #4
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good luck with that..I've never tried it.. you'll most likely strip it with a 12 point. maybe a 6 point might work...if you're replacing the entire line..however, how are you going to turn the wrench in such a confined space? that's why a crows foot socket can get in their with an extension and rachett
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 12-18-2013, 03:32 PM   #5
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Using a crowfoot socket and extension, would you not have to access it from above?
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Old 12-18-2013, 04:43 PM   #6
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you can try...sometimes you have to get creative to get parts off a car.
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 12-19-2013, 03:08 PM   #7
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Decided to abandon it and instead cut the line under the car where I can reach it, flare a new connection. Been playing around with a Partsource bubble flare kit rental on a scrap line. Hard to know if I'm doing this right. How does this one look?
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Old 12-19-2013, 03:32 PM   #8
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Are you sure they gave you a bubble flare kit and not a double flare tool?

Bubble flare on left, double flare on right.



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Old 12-19-2013, 03:52 PM   #9
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It's definitely a bubble flare kit. I think I didn't push enough of the line through the tool so the mushroom isn't as pronounced. I'll have to try some more to get the hang of it.
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Old 12-20-2013, 09:15 AM   #10
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I guess it's too late to help you out now but I had to replace that exact brake line this summer. I managed to get small needle nose vice grips in there to hold the nut on the regulator and a small wrench to turn the brake line. Setting up took about 10 mins, but the connection broke free in one try.
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Old 12-20-2013, 09:48 AM   #11
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Not too late. I haven't done anything yet. May yet try your suggestion.
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Old 12-20-2013, 08:12 PM   #12
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Getting better!


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Old 03-04-2014, 04:55 AM   #13
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Nice flare! make sure you file down the inside nicely if there are any burrs in there
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Old 03-05-2014, 06:48 AM   #14
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Since i was replacing that long line that goes towards the back, i just cut it. Once it was in my hand, just use some wrenches to take the rest of the line out of the regulator. I don't if Princess auto has them, but i went to Harbor Freight and picked up a 10 piece crow foot wrench kit for $10
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