Flywheel bolt
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Cargo Master
Joined: May 2001
Posts: 3,208
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Flywheel bolt
Anybody have the part number for the flywheel bolts on 1988 7.3 with a c6 auto tranny. Broke one tonight changing out flywheel / flex plate they are 3/8 16 grade 8 1.875 long the trick is they have a 5/8 head instead of 9/16. Ford or IH number either one is good for me.
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Cargo Master
Joined: May 2001
Posts: 3,208
Likes: 13
Ford part number for the automatic flywheel to crank bolt it E3TZ6379B.
They are obsolete but some dealers still have them. And yes I can buy 3/8 - 16 grade 8 bolts. But these use a 5/8 head instead of a 9/16 head I know it is not much but I like them all to match. So either replace them all or find the right one. Got lucky and the dealer in the town 20 miles away had some in stock.
They are obsolete but some dealers still have them. And yes I can buy 3/8 - 16 grade 8 bolts. But these use a 5/8 head instead of a 9/16 head I know it is not much but I like them all to match. So either replace them all or find the right one. Got lucky and the dealer in the town 20 miles away had some in stock.
Elder User
Joined: Mar 2008
Posts: 912
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From: Marianna, Florida USA
Take one to Fastenal and get a grade 9. I sheared all of my OEM bolts after I replaced the engine in my ambulance chassis (overtorqued them). Replaced them w/Grade 9 for less than I could get Gade 8 from Lowes. 
Elder User
Joined: Feb 2010
Posts: 724
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I'm gonna have to keep that in mined.
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