Re: LOOKING for convertor/ crankshaft bolts (hemi)
[Re: nosboy]
#681839
04/27/10 02:27 PM
04/27/10 02:27 PM
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Joined: Oct 2005
Posts: 1,646
Ringtown, Pa.
Dartsport540
top fuel
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top fuel
Joined: Oct 2005
Posts: 1,646
Ringtown, Pa.
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You could always grind the head of the bolts thinner.......
548 cu. in., Bill Mitchell Aluminum Block, CRT 727 auto trans, Alston Chassis. 8.981et at 149.46 mph. 1.204et - 60 foot, So Far....
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Re: LOOKING for convertor/ crankshaft bolts (hemi)
[Re: Dartsport540]
#681840
04/27/10 02:47 PM
04/27/10 02:47 PM
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Joined: May 2005
Posts: 6,446
NJ-USA
HPMike
master
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master
Joined: May 2005
Posts: 6,446
NJ-USA
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Common problem. Here is the solution. Come in a pack of 6 so you will need to buy two packages of these. I will tell you that they are probably going to be too long, I just cut them down and they work great. The heads are wafer thin and clear everything. Been using these for years. It isn't such a bad idea to have a few extra anyway. http://www.summitracing.com/parts/MRG-914/?rtype=10Part number Mr Gasket 913 is a pack of 8 but is out of stock at Summit. These are relatively new to the market. Just the ticket.  MB
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Re: LOOKING for convertor/ crankshaft bolts (hemi)
[Re: HPMike]
#681841
04/27/10 03:01 PM
04/27/10 03:01 PM
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Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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dont the 8 bolt cranks take 1/2 thread bolts and the 6 bolt cranks take 7/16 thread bolts?
nope...7/16 also..according to the part number..
Last edited by 70AARcuda; 04/27/10 03:03 PM.
Tony
70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: LOOKING for convertor/ crankshaft bolts (hemi)
[Re: 70AARcuda]
#681842
04/27/10 03:12 PM
04/27/10 03:12 PM
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Joined: May 2005
Posts: 6,446
NJ-USA
HPMike
master
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master
Joined: May 2005
Posts: 6,446
NJ-USA
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Quote:
dont the 8 bolt cranks take 1/2 thread bolts and the 6 bolt cranks take 7/16 thread bolts?
nope...7/16 also..according to the part number..
Not sure I understand your post. The ones I suggested are in fact 1/2"-which Hemi's and aftermarket 8 bolt cranks are.
MB
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Re: LOOKING for convertor/ crankshaft bolts (hemi)
[Re: HPMike]
#681844
05/03/10 08:42 AM
05/03/10 08:42 AM
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Joined: May 2006
Posts: 205
Chicago,Illinois
nosboy
OP
enthusiast
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OP
enthusiast
Joined: May 2006
Posts: 205
Chicago,Illinois
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I bought the 914 bolts and took them to the band saw and made them .625 (uhl).. The problem that I MAY have run into is,,,,the shoulder is .200 from underneath the head to the start of the first thread.. The flex plate is .110 and the spacer plate for the midplate is .090.. That equals to .200 ( the space of the bolt shoulder.. It looks like I run out of threads and start to eat into the shoulder of the bolt with the first thread in the crankshaft.. Looking at the bolt threads from the head,, looking down the threads,, you see the DAMAGE from the rolled over thread eating the top edge of the rest of the threads on the way out !!! Is it a problem????? Probably NOT if I use the right kind of locktite and torque the bolts up to 100 or so!!! I'll have ARP MAKE ME a set of 1/2 X 20 X .625 (uhl) bolts and SOLVE the problem the next time I have to put in a new flexplate!!!!
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Re: LOOKING for convertor/ crankshaft bolts (hemi)
[Re: nosboy]
#681845
05/03/10 08:59 AM
05/03/10 08:59 AM
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Joined: May 2005
Posts: 6,446
NJ-USA
HPMike
master
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master
Joined: May 2005
Posts: 6,446
NJ-USA
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Quote:
I bought the 914 bolts and took them to the band saw and made them .625 (uhl).. The problem that I MAY have run into is,,,,the shoulder is .200 from underneath the head to the start of the first thread.. The flex plate is .110 and the spacer plate for the midplate is .090.. That equals to .200 ( the space of the bolt shoulder.. It looks like I run out of threads and start to eat into the shoulder of the bolt with the first thread in the crankshaft.. Looking at the bolt threads from the head,, looking down the threads,, you see the DAMAGE from the rolled over thread eating the top edge of the rest of the threads on the way out !!! Is it a problem????? Probably NOT if I use the right kind of locktite and torque the bolts up to 100 or so!!! I'll have ARP MAKE ME a set of 1/2 X 20 X .625 (uhl) bolts and SOLVE the problem the next time I have to put in a new flexplate!!!!
Just use a thin "star" washer under the head of the bolt. I have done this before, works fine and still clears all converters.
MB
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Re: LOOKING for convertor/ crankshaft bolts (hemi)
[Re: HPMike]
#681846
05/03/10 08:40 PM
05/03/10 08:40 PM
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Joined: Jan 2003
Posts: 12,153
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,153
Benton, IL.
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I have run into this for years. I don't have a lathe but I do have a bench grinder. I just go to the local hardware store and buy the right grade 8 bolts and then chuck the threaded end into my drill and grind the head down nice and evenly on the bench grinder. I have done this many times for myself and some buddies.
Master, again and still
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