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4.9 Flywheel bolts questions -- grade 5 okay? by jokerb90
Started on: 08-22-2009 05:48 PM
Replies: 8
Last post by: stickpony on 08-23-2009 12:51 PM
jokerb90
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Report this Post08-22-2009 05:48 PM Click Here to See the Profile for jokerb90Send a Private Message to jokerb90Direct Link to This Post
4.9 owners -- I am getting closer, and I don't wanna mess this up -- centerforce dual friction finally showed!

What are you running for flywheel bolts?
Are the stock caddy ones long enough?

Running a LSC flywheel...

NAPA wants $70.00 for a set for a 4.6 Ford....

Locally I can only source grade 5 or NAPA, and I don't want to buy NAPA's if there too long or unnecessary -- please respond.
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jokerb90
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Report this Post08-22-2009 05:57 PM Click Here to See the Profile for jokerb90Send a Private Message to jokerb90Direct Link to This Post
quick search says v6 fiero or duke, have to check this out... any reported failures?

[This message has been edited by jokerb90 (edited 08-22-2009).]

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jokerb90
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Report this Post08-22-2009 09:24 PM Click Here to See the Profile for jokerb90Send a Private Message to jokerb90Direct Link to This Post

jokerb90

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the duke bolts will not work -- no way, the threads are much too coarse. Donor v8 is a 93 el dorado, any advice?
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RONT4.9
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Report this Post08-22-2009 11:03 PM Click Here to See the Profile for RONT4.9Send a Private Message to RONT4.9Direct Link to This Post
Don't know what length bolts you will end up needing, but for safety sake i would NEVER put a grade 5 bolt in the fly-wheel.
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Cooter
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Report this Post08-22-2009 11:26 PM Click Here to See the Profile for CooterSend a Private Message to CooterDirect Link to This Post
I think the ones I used were from a Ford Pinto. Seriously.
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Will
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Report this Post08-22-2009 11:41 PM Click Here to See the Profile for WillSend a Private Message to WillDirect Link to This Post
Isn't the 4.9 a metric engine? What class were the stock bolts? (10.9 or 12.9?) The stock Northstar bolts are torque-to-yield 10.9's, but I use 12.9's.
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Dennis LaGrua
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Report this Post08-22-2009 11:46 PM Click Here to See the Profile for Dennis LaGruaSend a Private Message to Dennis LaGruaDirect Link to This Post
Will is correct. You will need bolts in that strength range. You NEVER use SAE grade 5 bolts for any flywheel to crank application.

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jokerb90
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Report this Post08-23-2009 09:50 AM Click Here to See the Profile for jokerb90Send a Private Message to jokerb90Direct Link to This Post
Cooter, thanx for the info, the NAPA guys mentioned pinto as well, but had no price...

I rolled the dice on a ARP set from fleabay, 17.99 with free ship, will update if they work....

anyone have a torque spec they would share?

[This message has been edited by jokerb90 (edited 08-23-2009).]

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stickpony
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Report this Post08-23-2009 12:51 PM Click Here to See the Profile for stickponyClick Here to visit stickpony's HomePageSend a Private Message to stickponyDirect Link to This Post
 
quote
Originally posted by jokerb90:

4.9 owners -- I am getting closer, and I don't wanna mess this up -- centerforce dual friction finally showed!

What are you running for flywheel bolts?
Are the stock caddy ones long enough?

Running a LSC flywheel...

NAPA wants $70.00 for a set for a 4.6 Ford....

Locally I can only source grade 5 or NAPA, and I don't want to buy NAPA's if there too long or unnecessary -- please respond.


dood. go to the fierostore.com annd buy the flywheel bolts for a v6 manual flywheel. take the thinking out of the equation. they are the right length, right thread, and right strength. the TQ spec is the same as a V6 fiero flywheel for a manual tranny as well:

http://fierostore.com/Produ...rowse.aspx?d=373&p=1

choose the 85-88 V6 flywheel bolts, $24.95

MOST IMPORTANT: if you overTQ a bolt, just leave it overTQed, dont loosen it again.

[This message has been edited by stickpony (edited 08-23-2009).]

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