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Flywheel remachining
4 Attachment(s)
In case anyone needs to know
1st step - Set up in machine true to crankshaft bolt up face 2nd - A clean up pass - to uncover wear, damage, hot spotting and heat checking (cracks) etc --caused by worn / slipping clutch. 3rd - Machine until these marks disappear, usually about 1-1.5mm --any more than 5mm is probably time for a new FW. 4th - A cross hatch swirl pattern is applied to help the clutch bed in 5th - Deburr holes, retap threads, fit dowels if required and thoroughly clean. Tips:- Wash Fly Wheel and clutch Pressure plate faces with a solvent to thoroughly remove any trace of oil, grease, wax or protective coatings. Torque down clutch cover bolts evenly, paticularly on steel flywheels and use a smear of never seize on the bolt threads -as they have a habit of "firing" up (seizing) -especially if done up with a power wrench |
Mr F
Looks like new! What did you use to get the crosshatch pattern? Geof |
Trade secrets Geof :D --
better than new and finished with a 4" ceramic bonded sanding disc (skillfully applied of course) |
ive been using a friends engine room to build my new race engine in nice sterile environment and I see him do about 4 or 5 flywheels a day . I like watching the crank grinding machine best of all . I think I could move in and live at his engine recon shop lol.
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Live in a machine shop - thats sick Deano -although most machine shops need someone to clean and polish the machines :LOL:
Its imperative that the "hot spots" or surface hardening is completely removed -- the lathe is most efficient at this. The planetary surface grinder is not the best for (performance) flywheels, The process would take ages to grind out 1mm and using a magnetic chuck which stresses the surface out of shape also. |
Does resurfacing require removal of the crankshaft for rebalancing?
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Not usually -- some shops can do a premachine balance check of the FW, then an after machine balance validation of same
ie:- if it had an imbalance it would be brought back to the way it was presented |
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