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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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Posted: Tue Sep 19, 2017 3:05 pm Post subject: Pressure plate/flywheel bolts |
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Has anyone had any luck in sourcing locally the proper
5/16 NC x 1-1/16" hex head bolts for the pressure
plate to flywheel?
I've seen the posts about using all thread shank
vs the correct ones with the space with no threads
just below the head. I can find the former all day.
The local auto parts folks can't find it unless it's
listed for a particular vehicle, though I know
somewhere in the musty back of al three places
are the right bolts.
I hate this. Used to be you went to the parts house
and there was a 67 Dart with a 440 in it with numbers
painted in white shoe polish on the window.
It belonged to the kid behind the counter.
Today the kid behind the counter asked me who
the Willys was made by I was working on.
I know I can order them but is it impossible to find
them locally? _________________ Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php |
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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45auto Moderator
Joined: Apr 06, 2005 Posts: 148 Location: Georgia
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Posted: Tue Sep 19, 2017 4:32 pm Post subject: |
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They are not overly hard to find--the hard part is finding bolts that are 1 1/16 inch long. Those you find will be 1 inch long. Most over-the-counter bolts increase in 1/4 inch lengths---1/4, 1/2, 3/4.
Ask for Mr. Gasket brand pressure plate bolts in 5/16. Most auto parts stores will have 6 of them in a blister pack--1 inch long but will have the unthread shank next to the head.
Dorman, has some and for more money, ARP has them.
On eBay, there is a set listed for a ford....
http://www.ebay.com/itm/Mr-Gasket-911-Pressure-Plate-Bolts-Ford-all-Long-Style-5-16-18-x-1-/311107972996?epid=1917796561&hash=item486f7aef84:g:ZYoAAOSwv0tU-cB7&vxp=mtr
I was able to buy pressure plate bolts surplus for a M151 that was the correct length.
If you want to try and turn up some local--take a bolt with you and ask for 5/16 pressure plate bolts and see how close they match.
Let us know how you make out! _________________ Harold W.
MVPA #6833
1945 GPW
1950 CJV-35/U
1951 M38 1952 M38
1962 USMC Contract M38A1
1953 Strick M100 1967 Johnson M416
1968 CJ5 4-Speed 1969 CJ5 V6 |
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4x4M38 Member
Joined: May 30, 2014 Posts: 3447 Location: Texas Hill Country
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45auto Moderator
Joined: Apr 06, 2005 Posts: 148 Location: Georgia
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Posted: Tue Sep 19, 2017 10:01 pm Post subject: |
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If the originals are in good shape--not bent, have hack marks from being lose or have bad threads, I would think they would be good to go. Most of the pressure is from turning / shearing type of torque.
With the correct shank length (unthreaded part), you go from lose, to tight when the threads meet the shank. You do not stretch the bolt pre-say, they are tight when they bottom out on the shank.The shank keeps the pressure plate from slipping back and forth--which would eventually shear off the bolts. You would also want to use a small amount of blue lock-tite on the bolts to ensure they do not work lose.
I have re-used original pressure plate bolts without a problem, I needed some only when I didn't have them to start with or the hex was rounded off.
As far as the Ford pressure plate bolts, I wouldn't think a 1/16 inch would be a problem--what you do want is for the shank to be the same length.
Can you post a picture of the original pressure plate bolts? _________________ Harold W.
MVPA #6833
1945 GPW
1950 CJV-35/U
1951 M38 1952 M38
1962 USMC Contract M38A1
1953 Strick M100 1967 Johnson M416
1968 CJ5 4-Speed 1969 CJ5 V6 |
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OKCM38CDN Member
Joined: Feb 17, 2012 Posts: 530 Location: Del City, OK
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Posted: Wed Sep 20, 2017 5:30 am Post subject: |
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I may have screwed up here, but I went to the local Hardware store and bought Grade 8 1 1/4" bolts with the shoulder on them... they fit fine and so far seem to be doing ok... I have not actually started the motor yet. but will see what happens.
If I have messed up let me know... it is not too late to change them...
Hope this helps... _________________ Hal, KB1ZQ
TSGT, USAF (Ret)
1952 M-38 CDN CAR 52-31313
1952 M-100 Strick #104
1951 Willys Wagon (For Sale)
1954 Willys M38A1 201001205
Tornado Alley
Del City, OK |
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4x4M38 Member
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16256 Location: Wisconsin
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4x4M38 Member
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wesk Site Administrator
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4x4M38 Member
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mbullism Member
Joined: Jul 14, 2015 Posts: 36
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Posted: Wed Sep 20, 2017 11:35 am Post subject: |
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"A" is most likely ASTM A307 Grade A, typical mild steel hardware store bolt... these are typically unmarked, but not always
"BC" is probably ASTM A354 Grade BC, think "better" than SAE J429 grade 5 (three lines) but short of Grade 8 (six lines) |
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4x4M38 Member
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