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 Post subject: Which brake fluid?
PostPosted:Sun Sep 06, 2015 4:23 pm 
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Big Block

Joined:Sun Apr 05, 2015 3:08 pm
Posts:65
Car Details:1980 Camaro Berlinetta 305 v8
1993 Cadillac DeVille 4.9 v8
Anyone know what brake fluid I need for my 1980 2nd Gen v6?


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Which brake fluid?

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 Post subject: Re: Which brake fluid?
PostPosted:Sun Sep 06, 2015 4:50 pm 
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Big Block

Joined:Sun Jul 25, 2010 3:40 pm
Posts:206
Location:Roswell New Mexico
DOT 3 or DOT 4.
Don't add silicone fluid to a system that has any DOT 3 or DOT 4 fluid in it. It will trap moisture and rust out your calipers and wheel cylinders. If you have a dry system, like after a major overhaul, silicone based DOT 5 is the best to use.


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 Post subject: Re: Which brake fluid?
PostPosted:Sun Sep 06, 2015 6:14 pm 
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Big Block

Joined:Sun Apr 05, 2015 3:08 pm
Posts:65
Car Details:1980 Camaro Berlinetta 305 v8
1993 Cadillac DeVille 4.9 v8
Ah okay. I don't know what's in there but I just need to top it up. Am I best just going for some dot 3 non silicone then? :/


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 Post subject: Re: Which brake fluid?
PostPosted:Sun Sep 06, 2015 10:07 pm 
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Big Block
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Joined:Tue Feb 23, 2010 12:40 pm
Posts:3245
Car Details:'79 Camaro, 350 V8
Location:South Bucks
Yep, very much doubt there is a silicone one based in your system. I went with castrol react in mine http://www.ebay.co.uk/itm/Castrol-React ... 4181ec9494 As it's only £1.50 extra and the rule of thumb is to always go for the best fluid you can when it comes to brake fluid (higher boiling temps).

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 Post subject: Re: Which brake fluid?
PostPosted:Mon Sep 07, 2015 12:19 pm 
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Big Block
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Joined:Fri Mar 19, 2010 1:35 am
Posts:2566
Car Details:79' camaro road & track day toy. 383 stroker, 5 speed TKO trans, lots of suspension stuff, 13" Vette brakes, 18" wheels.
Location:Luton
Quote:
Yep, very much doubt there is a silicone one based in your system. I went with castrol react in mine http://www.ebay.co.uk/itm/Castrol-React ... 4181ec9494 As it's only £1.50 extra and the rule of thumb is to always go for the best fluid you can when it comes to brake fluid (higher boiling temps).
If you want to go slightly more OTT than the Castrol React, I use Motul RBF600 race fluid which is a still a DOT4 but has an even higher boiling point.

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 Post subject: Re: Which brake fluid?
PostPosted:Mon Sep 07, 2015 1:16 pm 
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Big Block

Joined:Sun Apr 05, 2015 3:08 pm
Posts:65
Car Details:1980 Camaro Berlinetta 305 v8
1993 Cadillac DeVille 4.9 v8
Cool thanks for the help guys. Does it matter if it's synthetic or not? I don't know what's in there now. Can I mix synthetic and non synthetic if that's what's in there? I only need to top it up.


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 Post subject: Re: Which brake fluid?
PostPosted:Mon Sep 07, 2015 7:06 pm 
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Big Block
User avatar

Joined:Tue Feb 23, 2010 12:40 pm
Posts:3245
Car Details:'79 Camaro, 350 V8
Location:South Bucks
It shouldn't do, most oils are synthetic now, mineral has become the minority. In most cases synthetic mixes with mineral so you should be ok. Synthetic has a base of mineral anyway, so can't see it having mixing issues. I'm no expert though. I added the Castrol React to whatever was already in there, so don't think it's an issue. Mainly the problem is from adding silicone based fluid as mentioned earlier, as it causes moisture problems. Sorry i can't give a more solid answer!

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How to post pics: When writing a message, scroll down and use the "attach file" option. Where possible, a photo sharing service can be used such as Flickr, Imgur etc. The image location (usually ending in .jpg) can be copy and pasted between the ][ brackets that appear when you click the 'Img' button (you can find this button at the top of the message box).

How to post youtube vids: Click on the 'youtubeHD' button at the top of the message box and in the middle of the ][ brackets that just appeared, copy and paste everything from the youtube web address that appears after the = sign i.e if this is the url: https://www.youtube.com/watch?v=K2cNqaPSHv0 just copy "K2cNqaPSHv0").


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 Post subject: Re: Which brake fluid?
PostPosted:Mon Sep 07, 2015 8:18 pm 
Offline
Big Block

Joined:Sun Apr 05, 2015 3:08 pm
Posts:65
Car Details:1980 Camaro Berlinetta 305 v8
1993 Cadillac DeVille 4.9 v8
That's alright. Thanks, I ordered some of that Castrol react dot 4. :thumbup:


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 Post subject: Re: Which brake fluid?
PostPosted:Mon Sep 07, 2015 9:48 pm 
Offline
Big Block
User avatar

Joined:Fri Mar 19, 2010 1:35 am
Posts:2566
Car Details:79' camaro road & track day toy. 383 stroker, 5 speed TKO trans, lots of suspension stuff, 13" Vette brakes, 18" wheels.
Location:Luton
Should be OK to mix mineral with synthetic.... If you suspect the fluid is pretty old it's worth bleeding the whole system to replace the entire with fresh, it'll help your braking..

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