New Flywheel? Hot spots on old one

psamtik · 11-14-2014, 08:52 PM

Car's in the shop right now since I started having a slipping clutch. I've owned this car for about 1000 miles (it was used and had 5 previous owners o_o), and it looks like whoever had it before me didn't know how to treat their clutch/flywheel.

At 46000 miles, this is what my flywheel looks like.

More pics in here:

View post on imgur.com

1) The shop said I could put it back in and it'd be likely fine, but accelerate wear on clutch, and the clutch wouldn't be warranty'able.

2) Replacing it would run me about 750-800 for the flywheel thru ECSTuning. Is this worth it for a car that I only want to keep for about 2-3 years? I intend to autocross and lap it a few times around the local scene.

3) DMFs are commonly considered not re-surfaceable but there are plenty of posts on the net that suggest otherwise. Anyone know a shop in the San Jose area that can resurface this?

Thanks!

psamtik · 11-16-2014, 02:15 AM

Bump. Does anyone know of any scrapyards around San Jose, Cupertino or can help me acquire me a used flywheel?

Dackelone · 11-16-2014, 02:28 AM

Buy a new flywheel IF you don't want to do this job again anytime soon. Your old FW is toast. Also replace all the bolts and rear crankshaft seal while you are in there.

K.david · 11-16-2014, 06:03 AM

It can't be machined because it's hard to lock down. I had the problem with my 335. I was lucky, a friend of mine in NC has a shop and used this pretty cool he attached to a drill and worked all the hot spots out. It looked like cylinder honing tool except it was smaller with stone balls at the ends. The flywheel looked great and worked perfectly.

Solo_M_Tech · 11-16-2014, 06:27 AM

Single mass replacement.

MightyMouseTech · 11-16-2014, 09:09 AM

That flywheel is toast. Replace for sure!!!!

11-14-2014, 08:52 PM	#1
psamtik Involuntarily BMW 31 Rep 184 Posts Drives: 09 E82 135i Join Date: Oct 2014 Location: San Jose / Cupertino iTrader: (1)	New Flywheel? Hot spots on old one Car's in the shop right now since I started having a slipping clutch. I've owned this car for about 1000 miles (it was used and had 5 previous owners o_o), and it looks like whoever had it before me didn't know how to treat their clutch/flywheel. At 46000 miles, this is what my flywheel looks like. More pics in here: View post on imgur.com 1) The shop said I could put it back in and it'd be likely fine, but accelerate wear on clutch, and the clutch wouldn't be warranty'able. 2) Replacing it would run me about 750-800 for the flywheel thru ECSTuning. Is this worth it for a car that I only want to keep for about 2-3 years? I intend to autocross and lap it a few times around the local scene. 3) DMFs are commonly considered not re-surfaceable but there are plenty of posts on the net that suggest otherwise. Anyone know a shop in the San Jose area that can resurface this? Thanks! __________________ 1997 328i / sold 1999 M3 / sold 2009 135i / current
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11-16-2014, 02:15 AM	#2
psamtik Involuntarily BMW 31 Rep 184 Posts Drives: 09 E82 135i Join Date: Oct 2014 Location: San Jose / Cupertino iTrader: (1)	Bump. Does anyone know of any scrapyards around San Jose, Cupertino or can help me acquire me a used flywheel? __________________ 1997 328i / sold 1999 M3 / sold 2009 135i / current Last edited by psamtik; 11-16-2014 at 02:20 AM..
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11-16-2014, 02:28 AM	#3
Dackelone European Editor 10539 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	Buy a new flywheel IF you don't want to do this job again anytime soon. Your old FW is toast. Also replace all the bolts and rear crankshaft seal while you are in there. __________________ Dackel's European Delivery Museum Guide
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11-16-2014, 06:03 AM	#4
K.david Private 0 Rep 83 Posts Drives: 07 335i Join Date: Feb 2013 Location: NC iTrader: (0)	It can't be machined because it's hard to lock down. I had the problem with my 335. I was lucky, a friend of mine in NC has a shop and used this pretty cool he attached to a drill and worked all the hot spots out. It looked like cylinder honing tool except it was smaller with stone balls at the ends. The flywheel looked great and worked perfectly.
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11-16-2014, 06:27 AM	#5
Solo_M_Tech Brigadier General 1688 Rep 3,140 Posts Drives: 2014 M5 6MT Join Date: Nov 2013 Location: Massachusetts iTrader: (7) Garage List 2014 BMW M5 [0.00]	Single mass replacement. __________________ 2014 M5 6MT
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11-16-2014, 09:09 AM	#6
MightyMouseTech Major General 4338 Rep 6,196 Posts Drives: 13 135i 6MT LeMans Blue MSport Join Date: Feb 2013 Location: Ottawa, Canada iTrader: (0)	That flywheel is toast. Replace for sure!!!!
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