DOT 5

[pwDave]

just double checking, I have replaced my entire brake system, new wheel cyl., master cyl.,all new steel lines, and all new rubber lines on all four corners, with a new system I was going to try some synthectic dot 5 fluid, Is there anything I need to know before I pour this in my system? Dave.

 

[moparnation74]

I am curious to see the responses.....I have asked the brake restorers and they say stick with the old. However, one leak etc and there goes the paint........The idea of using the non corrosive DOT 5 makes sense

You have replaced everything, so your good to go after flushing.....you just cant change midstream....

 

[PRND21]

I can't think of anything. Did you blow out the steel lines before installing? I've seen a little crap in the generic lines from the parts store. I've had DOT 5 in my Belvedere for about 8 years now with no problems.

 

[pwDave]

Built all the steel lines myself, there are no old lines on the car now, even the line going to the rear of the car from the master is new. Dave.

 

[moparnation74]

proportioning valve?

 

[lewtot184]

i've been using dot 5 for decades with no issue. dot 5 will trap air bubbles; something to watch for.

 

[Ranger16]

Everything you wanted to know about DOT ratings.

http://www.stoptech.com/technical-support/technical-white-papers/brake-fluid

 

[YY1]

I just put DOT 5 in my 73 last month.

Was encouraged by a few members after some hesitation (have a thread).

I don't have the engine in yet but I did bleed the brakes and used them without power assist to turn the car around.

No issues.

 

[moparnation74]

I just put DOT 5 in my 73 last month.

Was encouraged by a few members after some hesitation (have a thread).

I don't have the engine in yet but I did bleed the brakes and used them without power assist to turn the car around.

No issues.

Can you find that thread link YY1?

 

[YY1]

Looks like it was a few posts in the what did you do thread-------

http://www.forbbodiesonly.com/mopar...our-mopar-today.20805/page-154#post-910451797

 

[pwDave]

proportioning valve?

MN74, drums on all four corners, big ones on the front(11x3) the car will stop once as good as anybody, after that it's kinda sketchy, but I drag race so I only gotta stop once after a race, and don't have to hit the brakes at all during the race!! out on the street there has never been an issue with the rear coming around, but if it gets to acting up I'll put one on in a heartbeat. Dave.

 

[pwDave]

just double checking, I have replaced my entire brake system, new wheel cyl., master cyl.,all new steel lines, and all new rubber lines on all four corners, with a new system I was going to try some synthectic dot 5 fluid, Is there anything I need to know before I pour this in my system? Dave.

DOT5 it is then! Dave.

 

[pwDave]

BTY, thanks for the input every one, all of us are an asset to each other with our very diverse experinces, any thing that happens to one, has already happened to one of our other brothers, and therefore is a solveable problem. Dave.

 

[abodybill]

Just finished up the Roadrunner with DOT 5 and have put it in my last 3 Mopars with complete new brakes from the MC to the rears and never had any problems with it.
I also learned not to poor the DOT 5 fast into the MC as it will cause a lot of air bubbles and make it hard to get them out.

Good Luck

 

[Cornpatch MO]

i've been using dot 5 for decades with no issue. dot 5 will trap air bubbles; something to watch for.

I did have trouble getting brakes completely bled with new DOT 5 and all new componets. On another car, I had no trouble at all. However this last car did get the diisc brake conversion. Without power brakes. I got disgusted and stopped trying to bleed the system, Some time later, the air apparently worked its way back up to the MC cause when I tried the pedal, it worked just fine. Now They work great, and I did not use a proportioning valve.......................MO

 

[Malicious]

Dot5 here, I also had problems getting the air out. it was 2 parts perseverance, 1 part 'that'll do', 1 part 'week later rebleed' that seemed to work for me.

Considering the trouble I had with the rebuild MC being junk etc, I'm really glad I went DOT 5, as I'd have lost half my engine bays paint.

 

[YY1]

I had no trouble bleeding other than a stuck piston cup in one of my rockauto wheel cylinders.

One of the reasons I went with DOT5 is because I've had two "new" master cylinders leak out the rear seal after less than about 6 months.

 

[JRL]

Lost my brakes on the race car using dot5, only one front wheel locked up. Fortiently the car stopped a couple of feet before hitting the net.
This was many years ago so I can not remember what the conclusion was, but went over to conventional brake fluid after that and never had a problem.