spandak
spandak HalfDork
3/21/20 5:16 p.m.

Is it as simple as pumping out the old and in with the new? I've bled plenty of simple systems (non abs, etc) but I'm embarrassed to say I've never bled a modern car. My 986 is due and I figured while I was at it I would take care of my wife's 2018 Subaru. 
 

I know best practice is brake fluid every 2 years in DDs. Does everyone actually do this? 
 

Also DOT 5.1, I plan to put it in everything because 5.1> 4> 3 (jk because it's a better fluid so why not?) I know they're compatible I guess I just want to make sure I'm not missing anything. The Subaru is DOT 3 and I would rather have DOT 4 or better in it. 
 

Lastly, the price on this stuff is competitive. Any experience? Im thinking a quart per car and see how that goes. 
 

https://www.amazon.com/gp/aw/d/B07338GQM8/ref=ox_sc_act_image_4?smid=ATVPDKIKX0DER&psc=1

Keith Tanner
Keith Tanner GRM+ Memberand MegaDork
3/21/20 5:22 p.m.

For a street car, pay attention to the wet boiling temps. 

On an ABS car, you may have a way to trigger the pump whilst working. If not, you may have to do the flush, drive the car and trigger the ABS, and then bleed again.

02Pilot
02Pilot UltraDork
3/21/20 5:27 p.m.

I do mine every two years. A pressure bleeder is your friend. As long as you keep up with it, a liter per change should be enough for most vehicles. If it hasn't been changed in a decade, you'll need more to get it clean.

boxedfox
boxedfox Reader
3/21/20 8:05 p.m.

In reply to spandak :

That brake fluid is a fantastic deal. Wet boiling point is the same as Motul 5.1 (365 deg F), and the dry boiling point is just a few degrees off (518 deg F for the Bosch vs 522 deg F for Motul 5.1). I think I might get some for my truck.

Check the service manual for your wife's Subaru. Some newer cars are set up so the ABS pump automatically pushes fluid into the rear lines if it senses that the pressure is below a certain threshold. My Toyota truck has this, and it makes brake fluid replacement super easy. Turn the key to on, open one of the rear bleeders, stand on the brake pedal and let the ABS pump do the work.

spandak
spandak HalfDork
3/21/20 8:29 p.m.

Keith, my concern is primarily the pump. I've heard stories of issues revolving around that. 
 

pilot, I don't have a pressure bleeder and frankly I'm not interesting in buying one. My plan is to start with a one-man-bleeder and finish with a few pedal pumps. Will this work for an abs car? 
 

fox, that would be awesome if that was the case. It seems like that would bypass some of my concerns. 

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