Q. About Brake Fluid Flush & Replacement

I've decided that since my Corolla needs new brake fluid, I would
just use DOT4 to replace the current DOT3 fluid. I've built a homebrew
pressure tank bleeder to make it a 1 man job. You can take a look at it

he

http://geocities.com/mrbrakebleeder/


My question: Since I on flushing out the entire system, would it be
advisable to simple flush out the entire system with air to get out ALL

of the DOT3 fluid, and then refill with DOT4? Is it a good idea or bad
to have an 'empty' brake system? I know DOT4 is compatible with DOT3, I

just want to be sure ALL of the DOT3 fluid is replaced. Thanks.

wrote:
> I've decided that since my Corolla needs new brake fluid, I would
> just use DOT4 to replace the current DOT3 fluid. I've built a homebrew
> pressure tank bleeder to make it a 1 man job. You can take a look at it
>
> he
>
> http://geocities.com/mrbrakebleeder/
>
>
> My question: Since I on flushing out the entire system, would it be
> advisable to simple flush out the entire system with air to get out ALL
>
> of the DOT3 fluid, and then refill with DOT4? Is it a good idea or bad
> to have an 'empty' brake system? I know DOT4 is compatible with DOT3, I
>
> just want to be sure ALL of the DOT3 fluid is replaced. Thanks.
>

IMHO it would be preferable to just run fluid through the lines until it
runs clear and then a little more just for insurance. I'd rather my new
brake fluid be "contaminated" by a trace amount of the old rather than
by a trace amount of air.

nate

--
replace "fly" with "com" to reply.
http://home.comcast.net/~njnagel

Just finished. Didnt flush out..just used extra amount of DOT4 to be
sure all DOT3 was gone and out. DOT3 stuff was amber colored. DOT4 is
almost clear. No problems. Thanks.

Nate Nagel > wrote in
:

> wrote:
>> I've decided that since my Corolla needs new brake fluid, I would
>> just use DOT4 to replace the current DOT3 fluid. I've built a homebrew
>> pressure tank bleeder to make it a 1 man job. You can take a look at it
>>
>> he
>>
>> http://geocities.com/mrbrakebleeder/
>>
>>
>> My question: Since I on flushing out the entire system, would it be
>> advisable to simple flush out the entire system with air to get out ALL
>>
>> of the DOT3 fluid, and then refill with DOT4? Is it a good idea or bad
>> to have an 'empty' brake system? I know DOT4 is compatible with DOT3, I
>>
>> just want to be sure ALL of the DOT3 fluid is replaced. Thanks.
>>
>
> IMHO it would be preferable to just run fluid through the lines until it
> runs clear and then a little more just for insurance. I'd rather my new
> brake fluid be "contaminated" by a trace amount of the old rather than
> by a trace amount of air.



Ditto. I always flush my brakes once a year exactly as you say. My master
cylinder finally caved in last year, after 248,000 miles and 14 years.


--
TeGGeR®