C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Brake Line Washers - Sanity Check

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Old Sep 3, 2004 | 08:48 PM
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Default Brake Line Washers - Sanity Check

Just got home with my new rotors and calipers for my 89. A quick read through the manual for torque values and I noticed under brake hose replacement they recommend using aluminum washers.

So, as you might have guessed, the dealer gave me copper. I must admit, I just asked for washers and thought nothing of the copper ones I received because I've always used them in the past.

What kind of interactive is there going to be between the copper washers and the aluminum caliper? Anybody else make sure to use aluminum washers?
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Old Sep 3, 2004 | 09:43 PM
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???
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Old Sep 3, 2004 | 09:46 PM
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I just installed new calipers on my car also - I used the copper washers too....

Do I need to change them?
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Old Sep 3, 2004 | 09:59 PM
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Originally Posted by 65coop
I just installed new calipers on my car also - I used the copper washers too....

Do I need to change them?
Well, I don't know. There is going to be some galvanic action between the two metals and unfortunately, its the aluminum caliper thats going to suffer the worst of it. I just found this

http://www.coastalfasteners.co.nz/galvanic_table.htm

I haven't used them yet, but I think if I can get aluminum washers tomorrow I'll use them instead of the copper ones.

How long ago did you install yours?
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Old Sep 3, 2004 | 10:39 PM
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IMHO there isn't enough moisture here for galvanic corrosion to be a factor.

The factory washers I pulled off were copper. The new ones from GM were also copper. I don't recall anything about aluminum in my Helms manual.
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Old Sep 3, 2004 | 11:08 PM
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Originally Posted by 1MoorTym
Just got home with my new rotors and calipers for my 89. A quick read through the manual for torque values and I noticed under brake hose replacement they recommend using aluminum washers.

So, as you might have guessed, the dealer gave me copper. I must admit, I just asked for washers and thought nothing of the copper ones I received because I've always used them in the past.

What kind of interactive is there going to be between the copper washers and the aluminum caliper? Anybody else make sure to use aluminum washers?
My factory ones were also copper. I wouldn't lose any sleep over it if I were you. I've used and reused copper washers on all kinds of metals with banjo fittings, plugs, etc. to seal all types of fluids. Never, ever had a problem.
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Old Sep 4, 2004 | 02:28 PM
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Jason / Corvette Kid

You guys sure those were the original factory parts, just finished mine up and the washers were aluminum.

I did put the copper ones on, the weathers great and I want to drive the car. I'll order new ones from the dealer and change them out next year - it will be a good excuse to flush the system
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Old Sep 4, 2004 | 03:15 PM
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Originally Posted by 1MoorTym
Jason / Corvette Kid

You guys sure those were the original factory parts, just finished mine up and the washers were aluminum.

I did put the copper ones on, the weathers great and I want to drive the car. I'll order new ones from the dealer and change them out next year - it will be a good excuse to flush the system
You're right, of course. Since I bought mine 8 years old, I certainly can't be SURE they were the originals. I was ASSUMING and you know how THAT goes! Still though, I would not worry in the least. Enjoy your drive and yes, keep that system flushed every year or two at the most and you'll make this worn out old mechanic very happy!
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Old Sep 4, 2004 | 04:39 PM
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i don't think copper is a problem,, I may be wrong but it works on plugs in alum. heads
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Old Sep 4, 2004 | 06:54 PM
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Originally Posted by 1MoorTym
Jason / Corvette Kid

You guys sure those were the original factory parts, just finished mine up and the washers were aluminum.
I've no reason to suspect the brake lines were ever disconnected. When I bought the car at 46k, all the brakes were original except for pads and maybe fluid. The bleeder screws were almost seized up in the caliper too.

I would just enjoy the car and not worry Hope that helps.
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Old Sep 4, 2004 | 07:08 PM
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The stock brake lines on my 94 came with copper washers, as well as the Earls stainless steel brake lines I installed about a year ago.
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Old Sep 4, 2004 | 08:28 PM
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Originally Posted by STL94LT1
The stock brake lines on my 94 came with copper washers, as well as the Earls stainless steel brake lines I installed about a year ago.
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Old Sep 5, 2004 | 09:52 AM
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I think they all come with copper from G.M.
I wouldn't worry about it!!

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Old Sep 6, 2004 | 12:20 AM
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Originally Posted by edsalinas
I think they all come with copper from G.M.
I wouldn't worry about it!!

I worked in a brake/exhaust shop for about 5 years and every caliper I ever took off had copper washers. From aluminum ones to steel. The washers on my vette were copper and they are the original hoses and calipers. Don't worry about it.
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Old Sep 6, 2004 | 03:32 AM
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GM does sell aluminum banjo washers. The package says "off-road use only". I have the part # somewhere. I used them on my F-body with alum calipers.

however, the OE C4 washers were copper. so GM is Inconsistant with respect to aluminum calipers..........
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Old Sep 6, 2004 | 03:40 AM
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try this #....... but I can't make any promises. It's been a while since I played with my F-body... even though it has the same C4 PBR calipers. The washers come in a 10 pack.

Front brake hose to caliper bolt washer: 14076180
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Old Sep 6, 2004 | 07:19 PM
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Originally Posted by larryfs
so GM is Inconsistant with respect to aluminum calipers..........
That's seems to be how this one is ending up, and it won't be the last time there's little inconsistencies with the manuals and some cars having or not having the parts described in the docs.

I think everyones right, shouldn't be an issue either way. Out of curiosity though, I will visit the parts counter to see what they come up with..
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