datsunfish Posted December 10, 2008 Report Share Posted December 10, 2008 I was flipping through an old chilton manual for the 620/521 and it says to bleed the wheel closest to the master cylinder first. Everyone I have ever talked to has said to start furthest away and work your way foreward. This is a standard principle as far as I ever knew and the only way I have ever done it. Is this correct or does it even matter? Quote Link to comment
datzenmike Posted December 10, 2008 Report Share Posted December 10, 2008 (edited) Yeah, It would make sense to start close and replace the fluid closest the m/c with clean new stuff and slowly push it through the system with the bad always ahead of it. Also, seeing as how the fronts are separate from the backs how would it matter if you do the front first or last? I once quoted directly from the Datsun FSM for bleeding brakes and was told by everyone that replied that I had it backwards. Go figure. Edited December 10, 2008 by datzenmike Quote Link to comment
Cuts metal like mad Posted December 10, 2008 Report Share Posted December 10, 2008 On a 521 its a single piston master cylinder... front and back are not seperate. :D Quote Link to comment
Eastcoast521 Posted December 10, 2008 Report Share Posted December 10, 2008 Don't forget to bench bleed the MC first. Quote Link to comment
slodat Posted December 10, 2008 Report Share Posted December 10, 2008 Datsun brake master cylinders do not need to be "bench bled". That is chevy stuff. They have bleeder valves in the master cylinder. Which can be done on the car - prevents getting brake fluid everywhere when installing the master cylinder. Quote Link to comment
sdsurf Posted December 11, 2008 Report Share Posted December 11, 2008 ok, start furthest from the m/c then forward or closest back? I always thought furthest to the front... Quote Link to comment
ggzilla Posted December 11, 2008 Report Share Posted December 11, 2008 So the last Datsun m/c I bought came with instructions to bleed the M/C before bleeding the wheel cylinders. You can just crack the lines at the m/c to do it. I've always heard bleed the farthest wheel first... The easiest way I've found is to have a glass with some brake fluid in it, and put a hose from the cylinder nipple down into the fluid. It's easy to bleed the brakes single-person this way. Never seen this in a book, but it's worked for me for 20 years. Quote Link to comment
datsunfish Posted December 11, 2008 Author Report Share Posted December 11, 2008 I just did the mc in my 620 and it came with hoses to route into the resevoirs to bench bleed. Also some rubber cap off nipples I can use on a carb... I have a mighty vac kit that has the bleed off cup. Pour some fluid in it and it wont backfeed air. Quote Link to comment
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