I had one of these which bent due to centre main bearing overheating. I was advised to not attempt straightening an EN40B crank but get it ground to the next undersize. It just cleaned up...
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| 1275 CRANKSHAFT https://ausmini.com/forums/viewtopic.php?f=2&t=96043 |
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| Author: | mjollnir [ Fri Sep 15, 2017 5:37 pm ] |
| Post subject: | 1275 CRANKSHAFT |
Is it advisable to attempt to remove a 0.005 inch bend ( indicated on the centre main bearing journal) of an EN40B Cooper S crank? Also needs grinding which will take it to 0.020 undersize. Has passed crack testing.Thank you. |
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| Author: | drmini in aust [ Fri Sep 15, 2017 8:19 pm ] |
| Post subject: | Re: 1275 CRANKSHAFT |
I had one of these which bent due to centre main bearing overheating. I was advised to not attempt straightening an EN40B crank but get it ground to the next undersize. It just cleaned up...
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| Author: | 9YaTaH [ Sat Sep 16, 2017 10:37 am ] |
| Post subject: | Re: 1275 CRANKSHAFT |
Yeahbut Doc...if it was bent wouldn't it still wobbulate  I suppose decent bearings and a careful balance would minimise its effect... |
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| Author: | drmini in aust [ Sat Sep 16, 2017 10:46 am ] |
| Post subject: | Re: 1275 CRANKSHAFT |
Check balance after grinding. No problemo. Edit If it's .005" total indicator reading it will clean up easily at the next undersize. .010" smaller. |
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