resurfacing flywheel

[Fletch124]

I was just wondering how much on average it is to get a flywheel resurfaced? Is it absolutely necessary? I have about 6000 miles on my 7m with Spec stage 2, moving to spec stage 3 and i was wondering if after 6000miles i would really need it, guess cant get a true straight answer til i really look at it.

 

[lagged]

you should have it touched up just to break the glaze. ive HEARD that not resurfacing the flywheel makes the clutch more likely to chatter.

 

[loki2043]

its better to be safe the sorry. and hell, its only 20 bucks to get it surfaced.

 

[Fletch124]

its better to be safe the sorry. and hell, its only 20 bucks to get it surfaced.

Serious? I was thinking of like $50+.

 

[loki2043]

call around.. i had to call about 20 places before i found one that was 20. most places were like 40-60(yikes!). i dunno how many shops are out there in vegas but hit the book! (phone book)

 

[Fletch124]

call around.. i had to call about 20 places before i found one that was 20. most places were like 40-60(yikes!). i dunno how many shops are out there in vegas but hit the book! (phone book)

Reno I called a few shops today but they were all closed. Guess I cant get a true answer til tuesday.

I've heard that if you have it resurfaced by lathe then thats not the correct way, your supposed to grind it.

 

[Fletch124]

RESURFACING TECHNIQUES
Flywheels can be resurfaced two ways: by cutting or grinding. Cutting is usually done on a brake lathe. Setting up a flywheel on a lathe takes times and must be done carefully to make sure the flywheel turns true on the lathe. One drawback with cutting is that a lathe bit tends to skip over hard spots, leaving uneven areas.

The alternative is to remove a greater amount of metal, which may have an adverse effect on installed clutch height. On vehicles with hydraulic linkages, the release bearing may have limited travel. If too much metal is removed from the flywheel, the clutch may not fully release if the hydraulic linkage is at the limit of its travel.

Grinding is the preferred method for resurfacing most flywheels today. Grinding can be done on a head and block grinding machine, or a dedicated flywheel grinder. Grinding equipment designed for heads and blocks, though, can only handle flat flywheels and takes longer to setup than a dedicated flywheel grinder. If a stepped or recessed flywheel needs to be ground, a dedicated flywheel grinder designed for this purpose must be used.

On applications where a stepped flywheel is used (Honda and VW, for example), equal amounts of metal must be shaved off of both surfaces to maintain the proper clutch height and pressure. In other words, if .010 is removed from the lower step, .010 must also be removed from the upper step to maintain the same relationship. This requires using a flywheel depth gauge to measure the amount of recess before and after resurfacing.

A dedicated flywheel grinder with an overhead stone rotates the flywheel while it is being ground to achieve the required flatness with minimal metal removal. A grinder will remove hard spots and leave a smooth, homogeneous surface. Grinding time is typically three to four minutes. The flywheel is mounted using the crankshaft flange as a reference point, and custom adapters or centering cones can be used to center a recessed flywheel.

The proper surface finish can be achieved by wet grinding with silicone carbide stones or dry grinding with CBN stones (the latter are more expensive, but longer lived). Softer stones are recommended for grinding forged steel flywheels, while hard stones work best on cast iron flywheels. Using the proper coolant is important for long stone life and good cutting action. Water-based coolants should also contain a rust inhibitor to prevent rust spots from forming on a resurfaced flywheel.

When a recessed flywheel is ground, the stones leave a radius on the corner of the clutch cover mounting surface, whether the step is internal or external. This radius should be removed so the clutch pressure plate will match up squarely when it is installed.

 

[bluepearl]

you must check out the general condition of the flywheel before any decisions can be made.

 

[Reign_Maker]

Get the fly wheel inspected, and surfaced... I did mine, I thought it was cracked, turned out to just be color variations from heat on the surface, after the resurfacing, it looks perfect, and it cost me a little over $40 with new pins put in...

 

[EdgeSupra]

$50 for mine, guy did an awesome job too.

 

[NashMan]

well if not used that much aka looks mint still simple emrly cloth and brake cleaner will do the job but if look worna nd uneven then a reef is what you will need

a simple test ti take you finger nail and drag it across if it seam to be to rough resuvers it

and the chatter thing does nto applie to this at all only tiem chatter comes into play is the type of clutch you are useing or you fly wheel needs ot be replaced cause of ti being to thin or warped

 

[7Mboost]

It's cheap and your local machine shop can do it for you and tell you if its good or not, but better safe then sorry.