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03-09-2017, 08:04 PM | #1 |
Josef
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Request for Torque value: Flex disc bolts
I have found all other torque values I need from various threads in the DIY section, but I have searched for all sorts of variants of flex disc, guibo, torque values, etc - and I can't find the values for the 6 nut and bolts for the Guibo to trans output and driveshaft.
I have new bolts, but just want to make sure I torque them to the correct values. Any help greatly appreciated! Thank you!
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03-10-2017, 09:54 AM | #3 |
Josef
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I think that should be it - assuming we are the more aggressive thread on the M - so 48 ftlbs (64 Nm) it looks like - I'll go with that!
Thanks man!
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03-10-2017, 11:03 AM | #5 |
Josef
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Odd though - the bolts and nuts I have are M12
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03-10-2017, 11:05 AM | #6 |
Josef
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Damn, I used to have TIS, maybe I should look into having it again....
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03-10-2017, 12:31 PM | #7 |
Lieutenant
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@ $30/24 hours is really not a bad deal. I login, look at what I want and download a ton of stuff. Do it again every time I need something and download more info exactly for your VIN. They called it AIR now.
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03-10-2017, 01:10 PM | #8 |
Josef
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signing up for it now - damn its all different, I feel like I'm learning a new language!
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03-10-2017, 01:40 PM | #9 |
Josef
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see I think BMW might be confused - I have these bolts for the Guibo:
https://www.ecstuning.com/b-genuine-...h/26117527475/ And the matching nuts - which interestingly enough ECS lists as an M12 for the car.... something doesn't add up. They match up to exactly what I pulled out and are M12, but even ECS doesn't list them as applicable to the E90.... I wonder if TIS meant to loop E9X M3 in with the E39 M5 and E46 M3 in that section....
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03-10-2017, 02:42 PM | #10 |
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BMW lists this bolt as M12X1,5X71-ZNS3, P/N 26117527475 as the ones you got. I don't have one to look at, but maybe you could check yours and see what grade they are (if they have the grade stamped on the head). Still doesn't specifically solve the problem , but it will probably get you close enough. IF they are grade 8.8, torque varies about 10%; not enough to worry about.
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03-10-2017, 10:17 PM | #11 |
Josef
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The stamp is 10.9
I chose to do a stepped approach - 48 Nm (35 ftlbs) wasn't anywhere close to what they were when I pulled them off 64 Nm (48 ftlbs) still felt not tight enough compared to when I had taken them off 115 NM (84 ftlbs) I set to 84 and started to tighten, stopped when it felt close to the force it took to get them off - adjusted and measured at exactly 68 ftlbs - so that is what I went with.
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