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10-16-2012, 11:06 PM | #1 |
Member
Join Date: Nov 2011
Location: Wilmington New York
Posts: 94
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Flywheel pressure plate bolt size
I have what I believe to be a 49 to 53 flywheel.Truck or car I'm not sure.It has 3 sets of 2 holes ( not the evenly spaced holes around the flywheel) I'm attempting to mount my 10 1/2 pressure plate to the flywheel the bolt pattern on the pp is correct to the flywheel,but the thread size in the flywheel is 1/2 coarse thread? I looked through all the post that I could find and only saw where most flywheels were either 5/16 or 3/8 thread.Is this a stock bolt size or has the flywheel possibly been modified for some reason? Thanks in advance, Bill
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10-16-2012, 11:16 PM | #2 |
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Join Date: May 2010
Location: Orland Park,IL
Posts: 1,402
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Re: Flywheel pressure plate bolt size
You could use these inserts, all on the page are 1/2"-13 external thread, available in 5/16"-18 and 3/8"-16.
http://www.grainger.com/Grainger/key...071&sst=subset I would verify that the bolt circle for the pp is concentric with the flywheel, no telling what might have been done previously. To see the intended page you will need to look at the column on the left, it reads "Refine by", scroll down to External Thread Size, and click on 1/2"-13. |
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10-17-2012, 06:39 AM | #3 |
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Join Date: May 2010
Location: Gardiner Me.
Posts: 4,200
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Re: Flywheel pressure plate bolt size
I've never seen a wheel with 1/2in. thread. Are you sure you don't mean 5/16 course thread with a bolt head 1/2in. socket size? Walt
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10-17-2012, 08:26 AM | #4 |
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,457
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Re: Flywheel pressure plate bolt size
The only guess I could venture is maybe an industrial application of some sort.
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10-17-2012, 03:36 PM | #5 |
Member
Join Date: Nov 2011
Location: Wilmington New York
Posts: 94
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Re: Flywheel pressure plate bolt size
Walt Nope its excatly as I described.1/2 thread put a 3/4 wrench on the bolt and tighted it up.I will post pics of it later Bill
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10-17-2012, 05:25 PM | #6 |
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Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,457
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Re: Flywheel pressure plate bolt size
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10-17-2012, 08:02 PM | #7 |
Member
Join Date: Nov 2011
Location: Wilmington New York
Posts: 94
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Re: Flywheel pressure plate bolt size
Here are some pictures of the mystery flathead flywheel.I was in the process of getting my stuff together last night to take to the machine shop today after work when I noticed the thread size was larger.The guy doing my work is going to redrill my flywheel to the correct size thread. I said I would post Pics so here they are Bill
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