 Flywheel replace?, when do you need too? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| eg914 |
 Jan 12 2009, 01:30 AM
Post
#1
|
|
Member  Group: Members Posts: 319 Joined: 17-June 04 From: Elk Grove, CA Member No.: 2,223 Region Association: None  |
Pulled the trans for an oil seal replacement, and my clutch disc is down to the rivets on the pressure plate side. I thew in an old disc to keep me going (daily driver).
My question is, can I reuse the flywheel I have, or does it need to be resurfaced or replaced? How can I tell if the flywheel is OK to use as it is? Seems like the Pelican and AA kits can include flywheels, but that adds a bit to the cost. Just trying to figure out what the hit to the budget is going to be. Thanks |
   |
 
|
| southernmost914 |
Jan 12 2009, 08:06 AM
Post
#2
|
|
KEY WEST/HAVANA Tunnel Authority Group: Members Posts: 338 Joined: 16-October 07 From: Key West/ St. Augie, Fl USA Member No.: 8,234 Region Association: South East States 
|
You should at least resurface it to keep it from grabbing and smooth operation. Keep in mind these are 30+ year old flywheels and most likely have been machined before. I do not know the specs but you would have to spec it after machining. It better and cheaper in the long run to do it right than do it twice. (IMG:style_emoticons/default/biggrin.gif)
Steve |
|
|
|
| So.Cal.914 |
Jan 12 2009, 08:50 AM
Post
#3
|
|
"...And it has a front trunk too." Group: Members Posts: 6,588 Joined: 15-February 04 From: Low Desert, CA./ Hills of N.J. Member No.: 1,658 Region Association: None |
Just make sure the face has not been cut so much that the clutch disc center rubs on the F/W center bolts.
|
|
|
|
| eg914 |
Jan 12 2009, 10:45 PM
Post
#4
|
|
Member Group: Members Posts: 319 Joined: 17-June 04 From: Elk Grove, CA Member No.: 2,223 Region Association: None |
Thanks for the replies. Guess I will have to spend the bucks for a flywheel. I can't afford much down time when it comes to replacing the clutch. The flywheel is in the car now, and I probably won't have time to get it surfaced locally.
If I install a different flywheel will I need to check the end play of the crankshaft, or is that flywheel independent? |
|
|
|
| So.Cal.914 |
Jan 13 2009, 01:27 AM
Post
#5
|
|
"...And it has a front trunk too." Group: Members Posts: 6,588 Joined: 15-February 04 From: Low Desert, CA./ Hills of N.J. Member No.: 1,658 Region Association: None |
I would check it for sure.
|
|
|
|
| Mark Henry |
Jan 13 2009, 06:48 AM
Post
#6
|
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
You must check the end play if you change flywheels, good thing to check even with the same flywheel. You also should replace the flywheel seal and O-ring. If you have your ducks in a row with a good machine shop they should be able to grind your flywheel while you wait.
I wouldn't do it now, but on a tight budget I've reused a flywheel as long as the friction surface is flat (using a straightedge) and not glazed or burnt. BTDT |
|
|
|
| Jake Raby |
Jan 13 2009, 07:26 AM
Post
#7
|
|
Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
QUOTE(Mark Henry @ Jan 13 2009, 05:48 AM)  You must check the end play if you change flywheels, good thing to check even with the same flywheel. You also should replace the flywheel seal and O-ring. If you have your ducks in a row with a good machine shop they should be able to grind your flywheel while you wait. I wouldn't do it now, but on a tight budget I've reused a flywheel as long as the friction surface is flat (using a straightedge) and not glazed or burnt. BTDT Yep, what Mark said... Post some pics of it and I can tell you whether it has another "life" left in it for machining (more than likely) |
|
|
|
| Porsche Rescue |
Jul 8 2009, 05:39 PM
Post
#8
|
|
Saving and Enjoying Old Porsches Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None |
Jake, can you tell from this pic if the flywheel can be turned? I believe it only has 110K on the engine and I can't tell if it has ever been turned.
There is a deep groove on the outer circumference of the contact surface. It matches the light colored ring, about a 1/4" wide on the outer circumference of the disc. Since there are no rivets out there, I can't figure what made the ring. Clearly the flywheel should have been turned before this disc was installed.   |
|
|
|
| Jake Raby |
Jul 8 2009, 08:14 PM
Post
#9
|
|
Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
It looks low, but **may** have one more life in it... Have it measured.
|
|
|
|
| Porsche Rescue |
Jul 8 2009, 10:58 PM
Post
#10
|
|
Saving and Enjoying Old Porsches Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None |
Can you tell me the spec? Search here is unclear. Some say 11mm (disc surface to mounting surface) and others say 7-8mm. I know the plate mount surface and disc surface must be maintained at 22.5.
|
|
|
|
| JFJ914 |
Jul 9 2009, 09:31 AM
Post
#11
|
|
Senior Member Group: Benefactors Posts: 813 Joined: 13-June 03 From: Alpharetta, GA Member No.: 814 Region Association: South East States 
|
You will probably be ok as long as there is still a "step" left from the working surface toward the inner atachment.
|
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2025 - 04:29 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.