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| | | | Joined: Jan 2009 Posts: 256 'Bolter | | 'Bolter Joined: Jan 2009 Posts: 256 | I started to install the vacuum advance on my truck today, and ran into a problem. I wanted to test it before installing it, and when I sucked on the air line I could feel it holding a vacuum, but nothing moved.
Shouldn't the arm sticking out of the back of the diaphragm move? | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | Try pushing it in by hand. You may have something in a bind. Something may be keeping your distributor from moving. I have seen the side covers on GMC buckle from over tightening to where they put the distributor in a bind, | | | | | Joined: Jan 2009 Posts: 256 'Bolter | | 'Bolter Joined: Jan 2009 Posts: 256 | I can push it in by hand, but it takes quite a bit of force. I can't imagine it should take too much force to push that arm in. Can these be oiled or should I start looking for a replacement? | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | There is no oiling to them. Are you trying the advance by itself or is it installed on the distributor? The linkage can be bent or be rubbing on the push rod cover. | | | | | Joined: Jan 2009 Posts: 256 'Bolter | | 'Bolter Joined: Jan 2009 Posts: 256 | I took it off the distributor and removed the clamp that holds it to the distributor. | | | | | Joined: Apr 2009 Posts: 554 'Bolter | | 'Bolter Joined: Apr 2009 Posts: 554 | Try it on the truck or attach a hose temporarily from engine vacuum and see if it will move then. I doubt you can develop enough suck yourself thru that small diameter tube to make it move. I
have not been able to do it but connected to a vacuum pump (a brake bleeder pump)it works fine.
Chuck | | |
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