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<DIV><FONT size=2>I'm not aware that blowing and sucking on any tube at the carb
will help in diagnosing the brakes. If you mean the servo hose that should
come from the inlet manifold but still be no help.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Stomping on the pedal should not put air into the system, if
it does then there is a fault somewhere that needs to be found.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Is this single-circuit or dual-circuit brakes? The
former should have a 'slow-return' valve in the master outlet</FONT> <FONT
size=2>and with that if a couple of quick pumps on the pedal makes the pedal
shorter and harder, but then it goes long and spongy again if released for a few
seconds, that does indicate air in the system. Dual circuit
varied.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Unless the fluid level in the master dropped right down
to outlet level, or you have opened the plumbing anywhere, you should not get
air in the system by being parked up. A leak will of course lower the
level, could possibly allow air in I suppose, but doubtful in my mind.
I've found that fluid dropping on a concrete floor 'evaporates' over time.
Check the carpets under the pedal as that is another place where fluid goes if
the master secondary seal fails.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Bleeding method varies according to system type i.e. single or
dual.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>PaulH.</FONT></DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV><FONT
size=-1><FONT face=Arial><BR>I have a power assist brake system which after
bringing out of winter cover my MGB GT V8 exhibited brake failure No
brake fluid on the floor but it did need topping up. So added Dot
4 but still soft squashy pedal. Blowing/sucking on
tube to Edelbrock carb (I have a Rover V8 dropped in) it sucked but would not
blow (I understand this is correct}. So we figured that the brakes need
bleeding - is this a correct diagnosis? Any tips for a non-brake but
fairly well versed owner. If I stomped a lot on the pedal when
engine running would that put air into the brake
pipes<BR></FONT></FONT></BLOCKQUOTE></BODY></HTML>