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Old 11-24-2012, 02:35 PM   #1
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Default Big nose crank bolt torque

Ok so im going to install the super miata damper. I bought a new crank bolt and key way just to make sure we have no issues. Whats the procedure? I thought i read somewhere to use loc tite on the keyway? from the copy of the manual im reading it looks like torque should be 157-166 in ftlbs?

i tried searching but everything comes up.
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Old 11-24-2012, 04:35 PM   #2
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That is not the torque spec for the big bolt. Read the manual closer. It's something north of 100ft.lbs.
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Old 11-24-2012, 05:30 PM   #3
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that seems like an overtorque... I think it was 85-100ft.lbs.
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Old 11-24-2012, 05:37 PM   #4
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From the Haynes book: 116 to 122.
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Old 11-24-2012, 05:42 PM   #5
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Quote:
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From the Haynes book: 116 to 122.
Process of elimination: go with this.
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Old 11-24-2012, 09:38 PM   #6
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Quote:
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From the Haynes book: 116 to 122.
My Mazda 99-05 engine FSM agrees.
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Old 11-25-2012, 03:51 AM   #7
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Indeed:




As to locktite on the key, I find no reference to this in the official documentation, nor can I imagine how it would help (if by locktite you mean the conventional threalocker.)

Perhaps we are thinking of Loctite brand 660 "Quick Metal", which is indicated for the repair of a damaged short-nose crank? Do not apply this to an undamaged crank. This is a last-ditch fix to get a damaged engine to stay together if you have no other alternative.
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Old 11-25-2012, 05:15 AM   #8
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+1, the 660 fix is to get exactly 60,000 more miles out of your current engine, because there's no way in hell any of that is ever coming apart ever again once you do that fix.
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Old 11-25-2012, 09:14 AM   #9
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used 660 on a mk3 supra with crank nose damage.... good luck ever getting that back apart!
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Old 11-26-2012, 01:51 AM   #10
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I used the 660 loc tite fix Proceeded to beat on the motor pretty hard ...track day,MATG,and Miatas n Boone. Key way broke in half ..result in wobbling crank again....this time welded the crank. Then re filed keyway with dremal and file. ..no more slipping ... Power is back ....I think the 660 loctite fix may be good for stock NA power but high reving high hp....just weld the crank. Tighten the crank bolt to 120 ft lbs.

Also plan on super damper in spring ....let me know how install goes
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Old 11-26-2012, 02:20 AM   #11
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Quote:
Originally Posted by 1FastMx5 View Post
I used the 660 loc tite fix Proceeded to beat on the motor pretty hard ...track day,MATG,and Miatas n Boone. Key way broke in half ..result in wobbling crank again....this time welded the crank. Then re filed keyway with dremal and file. ..no more slipping ... Power is back ....I think the 660 loctite fix may be good for stock NA power but high reving high hp....just weld the crank. Tighten the crank bolt to 120 ft lbs.
I'm curious about something. I recognize the language which you are speaking as being fundamentally rooted in English, though for the life of me I can't even begin to place the dialect.
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Old 11-26-2012, 11:17 AM   #12
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Quote:
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I'm curious about something. I recognize the language which you are speaking as being fundamentally rooted in English, though for the life of me I can't even begin to place the dialect.
Dialect ...from unfortunately...a Red state 2500 miles east of ur coordinates
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