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Rule of thumb for bleeding brakes...
-Always start with a properly bled master cyl.
-Start bleeding at the wheel farthes from the master cyl then go to the next farthes wheel and so on.
-Also helps to "TAP" (not hit or bang) the caliper with a wood mallet similar a couple of times before opening the bleeder valve on the caliper. (the vibration frees up the air bubbles that cling to the sides of caliper walls)
It is advisable to bleed one valve at a time to avoid allowing fluid level in reservoir to become dangerously low. The correct sequence is to bleed the valve, either front or rear system nearest master cylinder first. This sequence expels air from lines and calipers or wheel cylinders nearest to the master cylinder first and eliminates the possibility that air in a line close to the master cylinder may enter a line farther away after it has been bled.
(end quote)
Kinda goes against the grain from the old school thinking on this. The way I read it doesn't matter if you do the front or the rear first, but do the nearest to the master cylinder working towards the farthest. One might think that GM had a reason for recommending it this way?
The most important thing about the sequence IMHO is on the rear calipers. When you bleed the rears you always want to do the inner half first before bleeding the outer half of the caliper. This will save time frustration and fluid.
If you do the outer half first, you can pull bubbles out from the inner half as the fluid flows out. They will pull over VERY SLOWLY over the course of the bleeding so you can get bubbles for a LONG time that way.
Do the inner bleeder first, then the outer one when doing the rear calipers.
It is advisable to bleed one valve at a time to avoid allowing fluid level in reservoir to become dangerously low. The correct sequence is to bleed the valve, either front or rear system nearest master cylinder first. This sequence expels air from lines and calipers or wheel cylinders nearest to the master cylinder first and eliminates the possibility that air in a line close to the master cylinder may enter a line farther away after it has been bled.(end quote)
Kinda goes against the grain from the old school thinking on this. The way I read it doesn't matter if you do the front or the rear first, but do the nearest to the master cylinder working towards the farthest. One might think that GM had a reason for recommending it this way?
If you try and bleed a C3 Vette farthest to closest you will be there all day. I pretty much proved this to a guy who didn't know Vettes not long ago. He believed after I showed him. Someone above got it right with:
LR
RR
LF
RF
I spent a whole evening on this once myslef, until I cracked the GM shop manual...smacked my head; did it the GM way and they bled first time around.
70s must be different from my 69. The brake lines run down the drivers side on mine.
Actually that's just what a forum member told me, and I assumed he was right (haven't looked yet) because of the weird bleed order we have. (I always thought it had to do with the proportioning valve/distribution block) Regardless, I've given you the proper bleed order.