Master Cylinder Brake Lines

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Nov 20, 2010 | 03:11 PM

Fastclient

Thread Starter

Racer

Joined: Nov 2010

Posts: 260

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From: MN

Master Cylinder Brake Lines

Doing some brake work and was going to replace the lines from the master cylinder to the switch. I notice the front line to the switch is 3/16" and the back line is 1/4" Is this correct or were they replaced with the incorrect size? Looked in the AIM but couldn't find anything on size tubing used. Thanks!

Nov 20, 2010 | 04:15 PM

Fastclient

Thread Starter

Racer

Joined: Nov 2010

Posts: 260

Likes: 74

From: MN

Failed to mention this brake question is in regards to my 1979, L82, manual trans
If someone could take a quick peek under their hood to see if theirs are different sizes (don't need to know specific sizes just if they are different) would be eternally grateful.
Thanks

Nov 20, 2010 | 04:28 PM

Bob Heine

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From: Boca Raton Florida

Yes, they are different size and my '72 has 3/16 on the front and 1/4 on the rear.

Nov 20, 2010 | 04:41 PM

Fastclient

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Racer

Joined: Nov 2010

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From: MN

Thanks, now I can head back out to the garage and see how many kinks I can put in those new lines!!

Nov 20, 2010 | 04:58 PM

Bob Heine

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Joined: Jan 2010

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From: Boca Raton Florida

Quote:

Originally Posted by Fastclient

Thanks, now I can head back out to the garage and see how many kinks I can put in those new lines!!

I gave up and replaced my mess with pre-bent stainless lines. The set I bought came with all the correct color fittings (I didn't know -- mine were rust color) and the lines were wrapped with stainless coils like the originals. InlineTube.com sells the plain steel set for $125 and stainless for $150. It's an 8-piece set that includes everything but the tees.

I have successfully single-flared stainless tube with 37-degree flares for AN fittings but have yet to make a safe double flare.

Last edited by Bob Heine; Nov 20, 2010 at 04:59 PM. Reason: Spelling of company name

Nov 20, 2010 | 08:19 PM

dgood

Burning Brakes

Joined: Apr 2009

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From: VIRGINIA BEACH VIRGINIA

fast client, I just replaced all my lines over the last couple of weeks and mine were 3/16 and 1/4. I bought mine from ZIP (steel) all pre-bent and they fit right in. Replace the brake hoses while you are there. I bought a new master cylinder also while I was at it. all very easy! (my first time doing this)

Nov 26, 2010 | 06:29 PM

Fastclient

Thread Starter

Racer

Joined: Nov 2010

Posts: 260

Likes: 74

From: MN

Thanks for the replies everyone. Took the advice and bought the pre-bent lines from Corvette Specialties here in Mpls. Didn't exactly slip right in but after about an hour of tweaking got them to fit. Got to say it was way easier than starting from scratch then trying to double flair them. Now what to do, what to do with the new double flair tool I bought and the stick straight lines laying on the work bench.

Nov 26, 2010 | 08:21 PM

Bob Heine

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Joined: Jan 2010

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From: Boca Raton Florida

Quote:

Originally Posted by Fastclient

Now what to do, what to do with the new double flair tool I bought and the stick straight lines laying on the work bench.

Hmmm. Why not make yourself a couple of master cylinder bleeder pipes? It's good practice and you never know when you'll need to replace the master. Or, you can put them in the drawer like me. My drawer has quite a few rarely if ever used tools. Like my rebar tie swivel hook....