Flywheel bolt torque?

[Dragonwind]

Having done so many other jobs on the car now I want to do my first ever clutch job and have been reading up on the procedure. I've got the 101 projects book but he mentions two different tightening procedures. One was a 90deg final turn and the other was 120deg. What is the actual correct procedure for these bolts?

Thanks
Chris

[clickman]

Have you posted this question on the Pelican tech forum? I'm sure Wayne would be more than happy to address it.

http://forums.pelicanparts.com/boxster-cayman-forum/

[JFP in PA]

There are not two procedures, there are two stages; for the flywheel bolts (new only, do not reuse), torque to 19 ft lb, then tighten another 120 degrees of rotation to gain the correct bolt stretch. For the pressure plate, torque to 17 ft lb.

[JAAY]

It is an easy job. I'm not too far away if you get stuck and want help.

[Dragonwind]

Thanks guys, and JAAY that's very kind of you. I thought the 120 was the proper one but in one photo he wrote tighten to 50%, then final torque, then 90deg further. The 2nd just mentioned the 120 degrees. I'll post the the Pelican tech too.
Thanks,
Chris

[harryrcb]

Originally Posted by JFP in PA

There are not two procedures, there are two stages; for the flywheel bolts (new only, do not reuse), torque to 19 ft lb, then tighten another 120 degrees of rotation to gain the correct bolt stretch. For the pressure plate, torque to 17 ft lb.

Hi JFP, just a quick question, I know the bentley book says 120 but in my Porsche manual it says 18 and 90 - why the difference and which is right?

[JFP in PA]

I just took a moment to look it up in my OEM manual set, and in Group 3, 30-1, page five under torque specs for dual mass flywheel, it says “25 Nm (19 Ft. Lb) plus 120 degree tightening angle”. As we kept this set current with all updates, I believe this is the most current info; yours may be from an earlier text.

[Gilles]

JFP,
Out of curiosity, if you use Locktite red on these bolts (4 insurance) before applying torque, would the real torque values be too different? Since you are supposed to oil the threads..

Originally Posted by JFP in PA

I just took a moment to look it up in my OEM manual set, and in Group 3, 30-1, page five under torque specs for dual mass flywheel, it says “25 Nm (19 Ft. Lb) plus 120 degree tightening angle”. As we kept this set current with all updates, I believe this is the most current info; yours may be from an earlier text.

[harryrcb]

Originally Posted by JFP in PA

I just took a moment to look it up in my OEM manual set, and in Group 3, 30-1, page five under torque specs for dual mass flywheel, it says “25 Nm (19 Ft. Lb) plus 120 degree tightening angle”. As we kept this set current with all updates, I believe this is the most current info; yours may be from an earlier text.

Thanks JFP , I must not have the updates, do you know where I can get those?

[Paul Lohman]

Originally Posted by JFP in PA

There are not two procedures, there are two stages; for the flywheel bolts (new only, do not reuse), torque to 19 ft lb, then tighten another 120 degrees of rotation to gain the correct bolt stretch. For the pressure plate, torque to 17 ft lb.

Is 17 ft lb correct for the clutch pressure plate. Installing soon. Thanks.
2001 Boxster S

[JFP in PA]

Internally balanced .

[PorscheFan5]

JFP,

Attached are some pics of my DMFW before clean-up. Would you agree that it seems in good condition? I tested based on the testing procedure you posted. The twisting results in deveation of about 10-12mm. So that is good. It is identical on both sides.

However, the FW does not go back to the original position (center) when released after twisting. Please tell me that I don't need to get another FW... I am planning on taking the FW for balancing today. Hopefully you'll see this message and are able to respond.

Thanks!

[JFP in PA]

Originally Posted by PorscheFan5

JFP,

Attached are some pics of my DMFW before clean-up. Would you agree that it seems in good condition? I tested based on the testing procedure you posted. The twisting results in deveation of about 10-12mm. So that is good. It is identical on both sides.

However, the FW does not go back to the original position (center) when released after twisting. Please tell me that I don't need to get another FW... I am planning on taking the FW for balancing today. Hopefully you'll see this message and are able to respond.

Thanks!

The flywheel should return to its original position after being tested. If it does not, the elastomer is failing and the unit needs to be replaced.

[PorscheFan5]

Thanks JFP.

Bummer. Now I need to get a DMF now...

While I am replacing the DMF, and given that I will be mating it with the Warp 9 DC motor and not the engine, should I go for a single mass FW? My clutch remains the same, correct?

Thanks!

[JFP in PA]

Originally Posted by PorscheFan5

Thanks JFP.

Bummer. Now I need to get a DMF now...

While I am replacing the DMF, and given that I will be mating it with the Warp 9 DC motor and not the engine, should I go for a single mass FW? My clutch remains the same, correct?

Thanks!

If I understand you DC set up, it is a constant torque at any RPM. If that is the case, you can use any flywheel that is properly balanced.

[JFP in PA]

Yes, new bolts only, dab of blue Loctite.