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Old 07-07-2014, 01:29 PM   #1
Skylane765
Splitter washers, jack pd

 
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Easy fix for brake fluid cap leaking

What I did on my ZL1 and Z28 is just use a spacer to get the bladder tighter on the tank. It worked like a charm! No more brake fluid leak. This pick is my truck, but the Camaro is the same cap. Use a old school door handle washer, or any other thin material.
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Old 07-07-2014, 03:05 PM   #2
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What did you use for a spacer?
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Old 07-07-2014, 03:08 PM   #3
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There is a TSB that replaces the entire reservoir for this problem. Fixed mine after different caps were tried.
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Old 07-07-2014, 03:36 PM   #4
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I just used a door handle plastic washer, like off a 55 Chevy, you can even make one out of any plastic like a milk carton. I found this to be way less time then taking to the dealer and changing it all out. I rather work on my own car for little things like this. Yes new caps do not help even a new reservoir may not help. I have a new reservoir on the Z28 and it leaked, after using the washer it stopped it forever.
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Old 07-07-2014, 03:41 PM   #5
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Quote:
Originally Posted by strych9 View Post
There is a TSB that replaces the entire reservoir for this problem. Fixed mine after different caps were tried.
Yes, new caps will still be loose. Even new tanks may leak, I have a new tank on the Z28 it leaked. The caps are just too loose.
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Old 07-07-2014, 09:15 PM   #6
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great idea
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Old 07-07-2014, 11:13 PM   #7
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Cool. Thanks! I'll give it a try.
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Old 07-08-2014, 01:18 AM   #8
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was this still an issue on the 2014's?
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Old 07-08-2014, 01:23 AM   #9
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He did the mod on his z28. It was leaking.
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Originally Posted by jayno20 View Post
was this still an issue on the 2014's?
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Old 07-08-2014, 07:37 AM   #10
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https://www.youtube.com/watch?v=SAi46RpJJAo
Mine was leaking around the seams and the cap.
https://www.youtube.com/watch?v=_5aUIFBJKKU
Dealer changed my reservoir, Notice the leak around the seams.
https://www.youtube.com/watch?v=3F54a58YbBM
Was a simple fix, Took about 1/2 hour.
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Old 07-08-2014, 09:40 AM   #11
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Quote:
Originally Posted by jayno20 View Post
was this still an issue on the 2014's?
Yes, the cap we think is loose for people that never check fluid and push the bladder back up, so it's loose to let the bladder suck down in the tank.

No it does not leak around the seams, the fluid just drains and stays on the seams.
There are just not to smart mechanics at dealers that think it leaks at the seams.
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Old 07-08-2014, 09:45 AM   #12
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Quote:
Originally Posted by jbotta View Post
https://www.youtube.com/watch?v=SAi46RpJJAo
Mine was leaking around the seams and the cap.
https://www.youtube.com/watch?v=_5aUIFBJKKU
Dealer changed my reservoir, Notice the leak around the seams.
https://www.youtube.com/watch?v=3F54a58YbBM
Was a simple fix, Took about 1/2 hour.
Better and easy, faster fix and will never leak is add the washer.
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Old 07-08-2014, 09:41 PM   #13
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I hate this...ever time I track my car I get some leaking around the reservoir.

I even swapped my V6 one for a V8 SS brake cylinder and reservoir and it still leaks.

What washer can I buy and install to fix this?
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Old 07-08-2014, 10:13 PM   #14
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If you have an Advanceauto store near you just get the GM replacement cap that doesn't have the logo. All I had to do was shave the inside groves and walah. Never leaked since.
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Old 07-08-2014, 10:31 PM   #15
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Quote:
Originally Posted by KaBoom1701 View Post
I hate this...ever time I track my car I get some leaking around the reservoir.

I even swapped my V6 one for a V8 SS brake cylinder and reservoir and it still leaks.

What washer can I buy and install to fix this?

This.
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Old 07-09-2014, 09:12 AM   #16
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My 2014 SS leaks as well as my 2012 ZL1 . . . great idea!
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Old 07-09-2014, 12:39 PM   #17
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Quote:
Originally Posted by L99CAMA2011 View Post
If you have an Advanceauto store near you just get the GM replacement cap that doesn't have the logo. All I had to do was shave the inside groves and walah. Never leaked since.
You have to have the grove to let air into the back of the bladder, if no grove air can not get to the top of the badder to let it go down to displace fluid as the linings wear.

You NEED that BLADDER, do not change cap unless it has a bladder and do not remove the air gap grove! All that's is wrong is the cap is loose.
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Old 07-09-2014, 12:43 PM   #18
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Quote:
Originally Posted by KaBoom1701 View Post
I hate this...ever time I track my car I get some leaking around the reservoir.

I even swapped my V6 one for a V8 SS brake cylinder and reservoir and it still leaks.

What washer can I buy and install to fix this?
Just make one from milk carton or any other thin plastic.
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Old 07-09-2014, 02:59 PM   #19
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Quote:
Originally Posted by Skylane765 View Post
Just make one from milk carton or any other thin plastic.
I will be doing this as soon as I finish my milk in the fridge! I just noticed leakage for the first time recently.
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Old 07-09-2014, 03:43 PM   #20
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Yes, it is common for the cap not being tight.
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Old 07-10-2014, 11:56 AM   #21
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Quote:
Originally Posted by Deke736 View Post
I will be doing this as soon as I finish my milk in the fridge! I just noticed leakage for the first time recently.
Hey Deke - Pour Me A Glass Of Milk Too - Let's Empty That Carton And Make (2) Gaskets - I Could Also Use One
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Old 07-10-2014, 01:17 PM   #22
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It is a great idea, I tried this on my 2013 ZL1 by using a rubber gasket under the rubber bladder, which was then a snug fit, however it still leaked at the track. So I went to the Dealer and asked for the newly "updated" reservoir, which I installed myself. There is a difference in the two reservoirs - they added a plastic baffle - right at the opening which keeps the fluid from coming back up through the cap - which still has a loose fit. Once I installed this new design it hasn't leaked a drop of fluid. This worked for me. Thanks guys.
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Old 07-10-2014, 04:58 PM   #23
Skylane765
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Originally Posted by CompulsiveZL1 View Post
It is a great idea, I tried this on my 2013 ZL1 by using a rubber gasket under the rubber bladder, which was then a snug fit, however it still leaked at the track. So I went to the Dealer and asked for the newly "updated" reservoir, which I installed myself. There is a difference in the two reservoirs - they added a plastic baffle - right at the opening which keeps the fluid from coming back up through the cap - which still has a loose fit. Once I installed this new design it hasn't leaked a drop of fluid. This worked for me. Thanks guys.
I have the baffle on my Z28 and it leaked until I added the gasket. With a extra gasket the tank should never leak, with or with out baffle. It is just physics, the cap should be air tight with the cap on tight, or you have a hole in the reservoir.
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Old 07-10-2014, 05:04 PM   #24
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Quote:
Originally Posted by jbotta View Post
https://www.youtube.com/watch?v=SAi46RpJJAo
Mine was leaking around the seams and the cap.
https://www.youtube.com/watch?v=_5aUIFBJKKU
Dealer changed my reservoir, Notice the leak around the seams.
https://www.youtube.com/watch?v=3F54a58YbBM
Was a simple fix, Took about 1/2 hour.
Mine was leaking, After the dealer changed the reservoir not one drop has leaked out. Go in to your dealer have them change out the reservoir. If your reservoir leaks GM has a TSB out to service reservoir with a new one. For a 60,000 dollar car we should not have to mod the reservoir with washers. Its a easy fix, Took about 1/2 to change reservoir. Mine was leaking around the seams and the cap. I use dot 4 super blue brake fluid and the brakes feel great. recommend DOT 4 Super blue.
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Old 07-10-2014, 05:10 PM   #25
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Cool Thanks! I will keep an eye on it. So far its been good!
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