RichFL

I've read conflicting reports on pushing the pistons inward without opening the bleeder valve. Some reports say you shouldn't do that because it forces dirty fluid from the ABS back into the brake system. I often do this when I'm changing from street pads to track pads.

What do you think?

Hal

If you are tracking your car, DE'ing it versus autocross, then you are flushing you brakes several times a year, right?

Then I would think keeping the bleed valve closed is fine.

Quadcammer

you're fine.

RichFL

I drive DE's, use Castrol SRF and flush twice a year.

997v2cabrio

How do you push the piston inward? by hand?

Rikky001

You can use the original Porsche tool made by Hazed. Make sure that your brake reservoir is not full as it might overflow. Better to suck out a bit as the stuff is very corrosive to your paint.
I have the nice Hazed tool but hardly use it, the backside of my hammer works fine to lever the pistons in without damaging them. Don't use force as there is a big possibility you will mess something up.

Rikky001

It is Hazet, not Hazed.
http://www.sierramadrecollection.com...ol-p25128.html

If you do brakes daily base a good tool, if it is once a year only it is way too expensive IMO.

Glyndellis

I have a Lisle 29100 quick quad pad spreader - it works well and was about $35 when I bought it in the spring this year.

RichFL

With the old pad still in the caliper, I put a rag over the caliper to protect the paint and squeeze the pistons back with a pair of channel locks. Sometimes I use a tapered piece of wood and gently push it down between the pad and the rotor. Never had a problem and I change pads often due to track use.

Hal

+1

phaphaphooey

Is there a problem with opening the bleeder valve and letting it squirt some fluid out? I have always done that. Seems to get rid of the dirtiest of the fluid since the fluid around the caliper gets the hottest and picks up the most moisture I would assume.

Little Green

I use this as well. Super easy to use. Got it at Pep Boys in their specialty tool aisle. Also bought drain plug socket, Oil filter spline socket etc there

jchapura

Forgive my dumb question, how does brake fluid become dirty? It seems that the system is essentially closed (except for when topping-off). Can the fluid "wear out" (like lubricants, e.g., engine oil)? Or, is the (only) reason to flush it because of its ability to absorb water?

RichFL

Brake fluid absorbs moisture which compresses thus reducing the effectiveness of the system and it may also cause rust to form.

Warehouse33.net

+2