S4/RS4 SAC pressure plates: How to check/set the SAC mechanism.
08-03-2005, 06:22 AM
#1
S4/RS4 SAC pressure plates: How to check/set the SAC mechanism.
Here's my RS4 pressure plate, as it came in the box. Notice the multiple slots around the middle of the surface, and there's nothing there....
<img src="http://pictureposter.audiworld.com/54525/dscn7029.jpg">
Next, I set it up on the press, careful to support it by the surface that bolts to the flywheel. If you support it by the friction surface, you'll risk damage to the assembly. I also use a strut top bushing to depress the clutch, since it's softer, happens to be the perfect size, and risks less for damage.
<img src="http://pictureposter.audiworld.com/54525/dscn7032.jpg">
Carefully depress the clutch, while watching the inside of the clutch. The SAC disc has wedges on it, that align with the slots on the pressure plate. You'll need to find the point inside, to pry on GENTLY with a small screwdriver. Once it's depressed enough, this adjustment will be as easy as typing on a keyboard. Don't depress it too much....
<img src="http://pictureposter.audiworld.com/54525/dscn7034.jpg">
Once you've done it correctly, this is what it should look like. If you can't see the difference, maybe compare this picture with the first one... ;-)
<img src="http://pictureposter.audiworld.com/54525/dscn7035.jpg">
<img src="http://pictureposter.audiworld.com/54525/dscn7029.jpg">
Next, I set it up on the press, careful to support it by the surface that bolts to the flywheel. If you support it by the friction surface, you'll risk damage to the assembly. I also use a strut top bushing to depress the clutch, since it's softer, happens to be the perfect size, and risks less for damage.
<img src="http://pictureposter.audiworld.com/54525/dscn7032.jpg">
Carefully depress the clutch, while watching the inside of the clutch. The SAC disc has wedges on it, that align with the slots on the pressure plate. You'll need to find the point inside, to pry on GENTLY with a small screwdriver. Once it's depressed enough, this adjustment will be as easy as typing on a keyboard. Don't depress it too much....
<img src="http://pictureposter.audiworld.com/54525/dscn7034.jpg">
Once you've done it correctly, this is what it should look like. If you can't see the difference, maybe compare this picture with the first one... ;-)
<img src="http://pictureposter.audiworld.com/54525/dscn7035.jpg">
08-03-2005, 07:04 AM
#4
Re: so if you remove a used SAC pressure plate, it should look like that or will the wedge have move
A new pressure plate should have the wedge sticking out of the slots, adjustment springs fully compressed. Depending on the degree of wear, the wedge will be adjusted out accordingly, to hold the friction surface closer to the flywheel.
08-03-2005, 07:32 AM
#7
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sorry, I mean one that is worn, adjusted by wear
so if I take out my 20k mile pressure plate, and it's SAC, should that adjustment plater be where it was from the beginning, or where it is in the first pic?
