Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

2 Pages V  1 2 >  
Reply to this topicStart new topic
> Clutch/flywheel Gurus, What does this indicate?
Joseph Mills
post May 7 2005, 05:53 PM
Post #1


on a Sonoma diet now...
***

Group: Members
Posts: 1,482
Joined: 29-December 02
From: Oklahoma City, OK
Member No.: 39



The flywheel pictured below has 5k miles on it along with a new pressure plate, clutch disc, throw out bearing, etc.

Clutch slips under full immediate throttle from a healthy four.

What are all the "spots" an indication of?


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bondo
post May 7 2005, 06:41 PM
Post #2


Practicing my perpendicular parking
****

Group: Members
Posts: 4,277
Joined: 19-April 03
From: Los Osos, CA
Member No.: 587
Region Association: Central California



It looks like grease or oil got on there, (radial streaks) and contaminated your clutch. Probably the source of the slipping and the spots. (but I'm no expert)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Allan
post May 7 2005, 06:44 PM
Post #3


Teenerless Weenie
*****

Group: Members
Posts: 8,373
Joined: 5-July 04
From: Western Mesopotamia
Member No.: 2,304
Region Association: Southern California



(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) Looks like grease or oil coming from under the flywheel bolts.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TimT
post May 7 2005, 06:45 PM
Post #4


retired
****

Group: Members
Posts: 4,033
Joined: 18-February 03
From: Wantagh, NY
Member No.: 313



To much grease in the pilot bearing.

from the amount of grease on the mating surface.. I cant believe your clutch slipped from grease though....

something else is going on..
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joseph Mills
post May 7 2005, 06:57 PM
Post #5


on a Sonoma diet now...
***

Group: Members
Posts: 1,482
Joined: 29-December 02
From: Oklahoma City, OK
Member No.: 39



I guess that the "radial" streaks are from the grease I applied to the throwout bearing and grease I inserted into the output shaft bearing in the flywheel?

I don't see how they relate to all the "spots".

The spots are burned into the new flywheel. This being the first time I have ever done this, I have NO idea what they are. (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)

And, possibly, more important, what does it mean? (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
davep
post May 7 2005, 07:09 PM
Post #6


914 Historian
*****

Group: Benefactors
Posts: 5,208
Joined: 13-October 03
From: Burford, ON, N0E 1A0
Member No.: 1,244
Region Association: Canada



The spots look like burn marks. Possibly burnt grease. Did you have the felt seal on top of the bearing?

Was the flywheel resurfaced? Was it resurfaced properly? The height of the mounting surface for the PP from the friction surface is critical. Is the friction disc the correct thickness? Is the PP fully engaging?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joseph Mills
post May 7 2005, 07:43 PM
Post #7


on a Sonoma diet now...
***

Group: Members
Posts: 1,482
Joined: 29-December 02
From: Oklahoma City, OK
Member No.: 39



Brand spankin' new flywheel.

New disc, pressures plate, etc.

This was done at the same time a top end rebuild was done. I seem to remember the felt seal was properly placed.

So these are "burn" marks?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joseph Mills
post May 7 2005, 07:47 PM
Post #8


on a Sonoma diet now...
***

Group: Members
Posts: 1,482
Joined: 29-December 02
From: Oklahoma City, OK
Member No.: 39



Actually, I guess I mis-spoke again. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

WHY is my clutch slipping?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
J P Stein
post May 7 2005, 08:56 PM
Post #9


Irrelevant old fart
*****

Group: Members
Posts: 8,797
Joined: 30-December 02
From: Vancouver, WA
Member No.: 45
Region Association: None



Note the grease (?) has migrated to the outer edge of the flywheel. It had to go around the disc to get there....between the flywheel/disc or disc/pressure plate...or both, but most likely the former.....burn marks are from slippage, me thiinks.

Figure out where the shittage is coming from,
clean up the surfaces and get a new disc.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sgomes
post May 7 2005, 09:50 PM
Post #10


Electric Member
***

Group: Members
Posts: 815
Joined: 6-May 04
From: Campbell, CA
Member No.: 2,029



Can we see a pic of the disk just for the heck of it? (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post May 8 2005, 12:31 AM
Post #11


Resident German
*************************

Group: Admin
Posts: 41,854
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California



QUOTE (sgomes @ May 7 2005, 07:50 PM)
Can we see a pic of the disk just for the heck of it? (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif)

(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) show us the disk!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joseph Mills
post May 8 2005, 12:35 AM
Post #12


on a Sonoma diet now...
***

Group: Members
Posts: 1,482
Joined: 29-December 02
From: Oklahoma City, OK
Member No.: 39



QUOTE (sgomes @ May 7 2005, 09:50 PM)
Can we see a pic of the disk just for the heck of it? (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif)

Hey sgomes

Okay just for the heck of it... here's a pic of the clutch disc...lettering stamp is still there.???

Most likely, I'm just in denial, like the river... (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

Hard to admit you fucked up...

Although I'd still like to know what I did. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post May 8 2005, 12:38 AM
Post #13


Resident German
*************************

Group: Admin
Posts: 41,854
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California



QUOTE (joseph222 @ May 7 2005, 10:35 PM)
lettering stamp is still there.???

dude. wtf? how many miles?

(IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Andy
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joseph Mills
post May 8 2005, 12:48 AM
Post #14


on a Sonoma diet now...
***

Group: Members
Posts: 1,482
Joined: 29-December 02
From: Oklahoma City, OK
Member No.: 39



QUOTE (SirAndy @ May 8 2005, 12:38 AM)
QUOTE (joseph222 @ May 7 2005, 10:35 PM)
lettering stamp is still there.???

dude. wtf? how many miles?

(IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Andy

5k on the engine, tranny, & clutch.



User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post May 8 2005, 12:57 AM
Post #15


Resident German
*************************

Group: Admin
Posts: 41,854
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California



QUOTE (joseph222 @ May 7 2005, 10:48 PM)
5k on the engine, tranny, & clutch.

looks like your clutch wasn't clutching at all ...

(IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Andy
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Type 4 Unleashed
post May 8 2005, 01:28 AM
Post #16


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None



Even though, it's new, it's the probally the pressure plate, are there any spots or blueing on the plate, the clutch disk, looks to have plenty of meat, the plate provides the clamping force, but the clutch was slipping, so no clamping force.

It looks like it wasn't a whole lot of grease, what there was, was burnt off

Is it the picture? Or is your flywheel missing the alignment pins for the pressure plate (3 0f them)?

Look at your plate, where the T O Bearing rides, all the tangs should be the same height, all the way around, if there are some of them that seem to be lower than the rest, there's your problem. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)

There are some heavy duty plates out there, other than the KEP plates.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joseph Mills
post May 8 2005, 01:55 AM
Post #17


on a Sonoma diet now...
***

Group: Members
Posts: 1,482
Joined: 29-December 02
From: Oklahoma City, OK
Member No.: 39



QUOTE (V6914 @ May 8 2005, 01:28 AM)
Even though, it's new, it's the probally the pressure plate, are there any spots or blueing on the plate

It looks like it wasn't a whole lot of grease, what there was, was burnt off

Is it the picture? Or is your flywheel missing the alignment pins for the pressure plate (3 0f them)?

Look at your plate, where the T O Bearing rides, all the tangs should be the same height, all the way around, if there are some of them that seem to be lower than the rest, there's your problem. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)

There are some heavy duty plates out there, other than the KEP plates.

Throw out bearing and pressure plate is good to go...(not broken)...

Only weird thing is the flywheel with the spots. I know someone knows what this is.

Well... that's what I'm hopin...fer (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)


post script: I hate to admit it, but I didn't have any alignment pins on hand. That could not possibly be my problem...

Right? (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Thorshammer
post May 8 2005, 10:23 AM
Post #18


Senior Member
***

Group: Members
Posts: 749
Joined: 11-November 03
Member No.: 1,335



They are just what you think they are, Hot spots. See this flywheel is an alloy, a mixture of steels to form a given end product, Those spots are from heat. It is common on a clutch slipping problem as yours is. A couple things that will make a clutch slip. Oil, grease those are simple, But many times the flywheel is new to you but is "rebuilt". one of the most common issues is to get a Bus fylwheel instead of a 914 flywheel which can lead to some very odd clearance issues. If you take a straight edge the spots will be raised just slightly, You may need to have the surface machined.Or try this....

Get a rotary scotchbright pad and clean the flywheel surface, don't be afraid to rough it up a bit. The disc will polish it okay. In the workshop manual there is a depth measurement for the clutch disc surface and I suggest you check it. If the clutch surface has been machined and the pressure plate mounting has not it will reduce the clamping force on the disc. This could very well be the problem. Also, does the clutch pedal move freely and return completely, if not it can stick and reduce the pressure plate force.

When Installing a new disc, just a tiny tiny bit of lube on the pilot shaft is all thats needed, I mean tiny. After that the clutch is a pretty simple piece. Enough clamping force and the proper depth will work wonders. Hope this helps.

Erik Madsen
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Type 4 Unleashed
post May 8 2005, 10:49 AM
Post #19


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None



At, what point in the 5,000 miles did the clutch start slipping? The excess grease you put on the pilot bearing and input shaft, started coming out the first day you started driving, and there couldn't have been that much. (That is grease you wiped your finger through in the picture?)


The alignment pins, are there for a reason, if that was the problem, then the clutch would of sliped from day one, (take the pins out of the old flywheel)

The clutch looks fine, clean it with some Brakkleen, then sand it with some rough paper to clean off any carbon build up. (If you don't want to use this greased soaked disk, send it to me I will (IMG:http://www.914world.com/bbs2/html/emoticons/smoke.gif))

I still think it's the pressure plate (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TravisNeff
post May 8 2005, 11:00 AM
Post #20


914 Guru
*****

Group: Members
Posts: 5,082
Joined: 20-March 03
From: Mesa, AZ
Member No.: 447
Region Association: Southwest Region



Could it be as simple as the clutch being too tight?, depth of the pivot on the throwout arm?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

2 Pages V  1 2 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 31st October 2024 - 05:13 PM