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Not to play the cynic too much, John but what would that sticker have cost Dow if they wanted to buy the space? I'm guessing they came out ahead on that deal.
Terry -
Yes, they came out WAY ahead; it cost them $575.00 based on the price difference they ate for the DOT4, which is about 10% of what it would have cost to "place" that sticker.
There was was no intent , just a article I found myself, The big thing with the dot 5 is the needing to start basicly fresh ,because if the dot 3 mixes with dot 5 it cause sludge in the master( Which you say in the above post), which I have seen being in the auto repair business, where the cust. have put in dot 5 with dot 3 not knowing they did anything wrong, along with other oil products that don't belong.
My reason is not to say you cannot use dot 5 but with most cars, you really need a fresh start, dot3 or dot4 or even dot 5.1 is nothing wrong with using it as it is cheap enough and the maint. on these fluids are maybe a little more frequent .Jeff was replacing the calipers on his car, maybe he will remove the master cylinder and clean out and blow out the lines, it his choice I guess.
New England chapter member, 63 Convert. 327/340- Chapter/Regional/national Top Flight, 72 coupe- chapter and regional Top Flight.
The big thing with the dot 5 is the needing to start basicly fresh ,because if the dot 3 mixes with dot 5 it cause sludge in the master
Although I start with all new parts when using DOT 5, just to see what happens, I've mixed DOT 3 & 5 together in a jar and have never been able to get it to turn to sludge. After being agitated, it always separates back to 2 distinct products after resting a while. I've never tried heating the mixture though. Maybe that could be the missing ingredient.
Although I start with all new parts when using DOT 5, just to see what happens, I've mixed DOT 3 & 5 together in a jar and have never been able to get it to turn to sludge. After being agitated, it always separates back to 2 distinct products after resting a while. I've never tried heating the mixture though. Maybe that could be the missing ingredient.
Jim
I suppose it could be heat and pressure and/or time, but that is a guess on my part. The SAE report didn't go into the mechanism of the sludge formation that I remember, and it even went so far as to show there was no degradation of the brake performance with the sludge in the system. They tested stopping distances on a long downhill stretch of highway.
Terry you stated that you cleaned all parts and lines with alcohol. Any certain kind you liked . This is not a trick question.I just read it back to myself and if I left it like that someone would chime in " MILLER LIGHT " . Jeff
68 L79 Convertible: Triple Black: Work In Progress, Body off. Now on!
2014 Arctic White Z51 Vert. (Wifes)
Terry you stated that you cleaned all parts and lines with alcohol. Any certain kind you liked . This is not a trick question.I just read it back to myself and if I left it like that someone would chime in " MILLER LIGHT " . Jeff
Not the drinking kind -- although I suppose Vodka would work, but that seems a waste. I used isopropyl from the drug store. Not beer. The hops and barley would clog the lines.
I recommend denatured alcohol, which you can buy in quarts or gallons from any hardware/home supply store.
Grocery/drug store rubbing (isopropyl) alcohol is 30 percent water.
Make sure you thoroughly dry everything including the brake pipes with plenty of compressed air.
When converting to DOT 5 buy new hoses and thoroughly flush them with denatured alcohol. The ended are swagged on with DOT 3 as a lubricant, so there is a film of DOT 3 in the hoses.
Jeff I had my calipers SS sleeved in 1988 and went back with Dot 5 with no problems. The one advantage is, it is not water soluble. Dot 3 mixes with water very easily and is the reason to use SS. There was an article some years back about a fellow member taking his car to Denver and when reaching the higher elevatios he had no brakes. Seems like if you have the least amount of air in your system it is magnified. Hope this helps Reed
I heard this also about higher altitudes and loss of braking action some year back. I don't remember the reason why though. But while we're here, is DOT 3 compatible with DOT 4?
Each day is a gift, respect it, and enjoy it as if it were the last!
I heard this also about higher altitudes and loss of braking action some year back. I don't remember the reason why though. But while we're here, is DOT 3 compatible with DOT 4?
Yes DOT 3 and 4 and 5.1 are compatible with each other. Each higher number has higher boiling points, but a mixture of two types will have the lower boiling point (more or less). My point is mixing will lose some of the advantage of the higher numbers.
I used isopropyl from the drug store. Not beer. The hops and barley would clog the lines. 
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