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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Jan-20-2018, 03:25:09 AM   #1
bigjae1976
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Default Resetting a self adjusting clutch

First off...it is a pain.

Overview.

This is a pain because you need to align the clutch but the pressure plate needs to be loose so you can rotate the SAC mechanism. You can rotate the SAC mechanism if you have the friction surface on the pressure plate pressed against something AND the center fingers pressed.

Tools.

large 3 jaw puller
a metal plate about the same diameter as the throwout bearing
2 screw drivers

Step 1.

Install the clutch and pressure plate using the clutch centering tool and your old pressure plate bolts. Make sure the gearbox side marking on the clutch is facing...the gearbox. Snug down all 6 bolts to spec.



See how the fingers on the pressure plate are pressed down?



Step 2.

Remove the clutch centering tool. Double check the disc is well centered.

Step 3.

Install the 3 jaw puller and snug it down against the pressure plate fingers. (NOTE: You do this with the pressure plate installed on the flywheel with the clutch disc installed. Picture taken on work bench for demo purposes only)



Step 4.

Loosen pressure plate bolts so the bolts are hand tight. You want to make sure you don't loosen the bolts too much and the clutch disc moves.

Step 5.

Rotate the SAC mechanism with a screwdriver and hold. You just need to compress 1 spring and the entire SAC mechanism will rotate. The mechanism should rotate freely but spring back if released.

I use 2 screw drivers so I can wedge a wider screwdriver to hold the SAC mechanism in its reset position. I use a smaller one to rotate the SAC a little and then use a second larger screwdriver to wedge in the slot to keep the mechanism compressed.



Step 6.

Keep the SAC mechanism springs compressed and tighten a couple of PP bolts (I do 3) AND remove the 3 jaw puller.

Step 7.

Remove screwdriver/release SAC mechanism.

Step 8.

Final check. Make sure the springs stay compressed.



You should see some tabs in the slots on the PP.



Install the centering tool to make sure the clutch disc is still centered.

Install 3 new PP bolts in the other 3 holes that you did not install a bolt in. Torque them to spec. Then replace the 3 old PP bolts and with new bolts.

Done!
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Last edited by bigjae1976; Sat, Jan-20-2018 at 03:28:59 AM.
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Old Sat, Jan-20-2018, 03:32:56 AM   #2
95bullet
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Default Re: Resetting a self adjusting clutch

There is a step you are missing. Compress the sac mechanism 85% to easily reset the springs then tighten it down to 100% and you wont have to hold the mechanism in place
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Old Sat, Jan-20-2018, 03:36:04 AM   #3
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Default Re: Resetting a self adjusting clutch

Quote:
Originally Posted by 95bullet View Post
There is a step you are missing. Compress the sac mechanism 85% to easily reset the springs then tighten it down to 100% and you wont have to hold the mechanism in place
The center fingers where the TOB presses against or the springs? That would have been a helpful tip an hour ago!

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Old Mon, Jan-22-2018, 04:05:36 PM   #4
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Default Re: Resetting a self adjusting clutch

The central fingers :P
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Old Mon, Jan-22-2018, 04:16:10 PM   #5
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Default Re: Resetting a self adjusting clutch

I had to do this once but I had forced back the original 3 finger lock that comes with the clutch and pressure plate back in its original position.
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Old Wed, Jan-24-2018, 04:26:29 AM   #6
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Default Re: Resetting a self adjusting clutch

I think another way to "reset" it is if you bought the original from FCP Euro and you can use their warranty to exchange? Anyway...

Do you have to take the pressure plate off in any special way? I read on one of the forum posts somewhere (a while back) that if you take it off in a regular fashion and it locks up, it becomes useless. Was that just folks who do not know how to reset it speaking, or is there any special procedure (like unscrew the 6 pp bolts 1/4 turn at a time slowly, etc)?
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Old Thu, Jan-25-2018, 12:39:23 AM   #7
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Default Re: Resetting a self adjusting clutch

Quote:
Originally Posted by mrgizmo04 View Post
I think another way to "reset" it is if you bought the original from FCP Euro and you can use their warranty to exchange? Anyway...



Do you have to take the pressure plate off in any special way? I read on one of the forum posts somewhere (a while back) that if you take it off in a regular fashion and it locks up, it becomes useless. Was that just folks who do not know how to reset it speaking, or is there any special procedure (like unscrew the 6 pp bolts 1/4 turn at a time slowly, etc)?


They didnít know how to reset the SAC.

You could go the FCP Euro route. Seems like a pain.


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Old Thu, Jan-25-2018, 04:57:14 AM   #8
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Default Re: Resetting a self adjusting clutch

Quote:
Originally Posted by bigjae1976 View Post
They didnít know how to reset the SAC.

You could go the FCP Euro route. Seems like a pain.


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Old Fri, May-18-2018, 08:48:44 PM   #9
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Default Re: Resetting a self adjusting clutch

great writeup, but do you need the metal plate that's the same diameter as the TOB? The picture shows the 3 jaw puller with what appears to just be the components of the 3 jaw puller. Could a large 35mm socket work too?
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Old Fri, May-18-2018, 08:57:44 PM   #10
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Default Re: Resetting a self adjusting clutch

Quote:
Originally Posted by Braymond141 View Post
Easy way is to use the SAC lock mechanism that ships with the pressure plate and a press. Press the lock mechanism down in the unlocked position. Reach under with the proper allen socket and turn the lock with the press holding pressure down. You can reset it in just a few minutes.



I was always under the impression that if that lock isn't in place when you install the pressure plate, you did it wrong. Isn't your guide wrong?
What about the rotational aspect, where the green springs need to be compressed by rotating one of the middle plates? Simply compressing the diaphragm doesn't accomplish that, does it?

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Discussing Resetting a self adjusting clutch in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)