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04-27-2020, 04:34 PM | #1 |
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Torque for Flyeheel to crank bolts?
Checked @ 70-85 ft lbs & thought seemed high so thought I’d check, Remembered my old ‘57 Chev 283 was 60 ft lbs. Belt & suspenders
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04-27-2020, 05:15 PM | #2 |
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Re: Torque for Flyeheel to crank bolts?
Just checked F-Series manual (49-52), and flywheel bolt torque specification is 75-85 ft-lb.
That is the torque range for a 7/16-20 Grade 8 bolt. Last edited by JSeery; 04-27-2020 at 05:25 PM. |
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04-27-2020, 05:16 PM | #3 |
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Re: Torque for Flyeheel to crank bolts?
65 ft lbs
edit; J Serry replied before me...with different information. My chart, and what I've always used says 65 ft lbs Never lost a flywheel, or my legs yet! lol
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04-27-2020, 05:19 PM | #4 |
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Re: Torque for Flyeheel to crank bolts?
Checked several places, gonna go w 75ft lbs as I’m using locking wire. Probly Another Dumb question, how do I lock up Engine / flywheel to torque. Barely at 60ft lbs & flywheel turning even w full weight of engine sitting on sprocket ring?
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04-27-2020, 05:28 PM | #5 |
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Re: Torque for Flyeheel to crank bolts?
I have a spanner type of device than catches the teeth on the flywheel.
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04-27-2020, 05:31 PM | #6 |
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Re: Torque for Flyeheel to crank bolts?
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04-27-2020, 05:31 PM | #7 |
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Re: Torque for Flyeheel to crank bolts?
65-70 for the bolts with safety wire...80 for the later selflocking.
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04-27-2020, 05:36 PM | #8 |
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Re: Torque for Flyeheel to crank bolts?
Here are the values posted on VanPlets site, it depends on bolt type and year range. The first chart is 32-48 and the second is 49-53.
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04-27-2020, 06:28 PM | #9 |
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Re: Torque for Flyeheel to crank bolts?
Thx Guys! Much appreciated! U r all always a great source!
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04-27-2020, 06:43 PM | #10 |
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Re: Torque for Flyeheel to crank bolts?
I used an old wrist pin in one of the crank balance holes. That worked well to stop it turning. I used 65 - 70 ft lbs as the figure.
Last edited by Mart; 04-27-2020 at 06:49 PM. |
04-27-2020, 07:26 PM | #11 |
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Re: Torque for Flyeheel to crank bolts?
I use a hammer handle between a counterweight and side of block
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04-27-2020, 11:11 PM | #12 |
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Re: Torque for Flyeheel to crank bolts?
I use a piece of 1"x1" angle iron with a hole, that catches a tooth on the ring gear. Works for removal, too.
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04-27-2020, 11:20 PM | #13 |
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Re: Torque for Flyeheel to crank bolts?
Duhh! SO simple...SO slick! DD
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04-27-2020, 11:24 PM | #14 |
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Re: Torque for Flyeheel to crank bolts?
Nice setup!
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04-28-2020, 01:43 AM | #15 |
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Re: Torque for Flyeheel to crank bolts?
Simply clamp a vise grip to the flywheel ring gear. It is shown in Vern Tardels book. I doubted the method, so grabbed a vise grip and torqued the bolts down to 80. No problem at all.
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04-28-2020, 07:41 AM | #16 |
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Re: Torque for Flyeheel to crank bolts?
Good stuff! Neat tricks Ross & Titus
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04-28-2020, 08:02 AM | #17 |
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Re: Torque for Flyeheel to crank bolts?
Hey TitusDH, Wow worked like a Charm!!!
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Nomad Last edited by AnthonyG; 04-28-2020 at 08:14 AM. |
04-29-2020, 01:54 AM | #18 |
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Re: Torque for Flyeheel to crank bolts?
Great !!
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04-29-2020, 11:49 AM | #19 |
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Re: Torque for Flyeheel to crank bolts?
Perfect timing. I'm in the process of putting mine back together.
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