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Anybody know why the 4.0 has studs on the head bolts?

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Old May 7, 2014 | 06:30 AM
  #31  
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Originally Posted by JeepCoMJ
Yes, because drilling impact sockets is easy. And I love voiding the warranty on my snapon and cornwell tools, much less scuffing the crap out of them via whatever method of holding them you use.


No, I will keep my disdain for 12 point bolts.
Scuffing the crap out of them?
Do you even wrench?
Use a v block to hold them
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Old May 7, 2014 | 07:33 AM
  #32  
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Originally Posted by Radi
Pentastar Aviation?
Yes.

Worked there from 1983 to 2001, when I took an early out retirement deal from Chrysler. Then I went back to work with them as a contract worker. Then when Edsel Ford II bought Pentastar Aviation from Chrysler, I stayed with them until 2007 where I retired for good. After 43 years in aviation I'd had enough.
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Old May 7, 2014 | 08:30 AM
  #33  
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so you really DID go to rocket science school. I thought as much,


Mealtime
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Old May 7, 2014 | 09:29 AM
  #34  
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Originally Posted by skife
Scuffing the crap out of them?
Do you even wrench?
Use a v block to hold them

Lmfao. I have owned and worked on more jeeps than most of the forum. I just respect my tools for what they do for me. Hell, my 3 year old cornwell impacts have been used daily and do not have so much as a scuff.

I'm the guy who wipes off each tool after use and puts them away.


And I'm still not going to torque using a chrome socket.


Basically, here is what I'm saying. The available head bolts are 12 point and have a very tall stud on them. They are torqued with a 1/2" torque wrench generally, so 3/8 socket is absolutely out of the question as an adapter will lose energy thus giving you inaccurate feedback through the torque wrench, thus improper torque. Same goes for using chrome sockets in general.

Since that's the case, AND the rear driver firewall head bolt is a real bugger to get at, I recommend cutting off all unnecessary studs from the head bolts.

The reason the rear firewall head bolt is a bugger is that, even if you have access to a truck brand, the socket necessary is not cheap, and it is 1/4" too tall to allow you to get a torque wrench or ratchet on that particular head bolt.

If you can't understand this, having been laid out very simply, you should not be turning a wrench.

Last edited by JeepCoMJ; May 7, 2014 at 02:49 PM.
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Old May 7, 2014 | 10:07 AM
  #35  
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Originally Posted by JeepCoMJ
Lmfao. I have owned and worked on more jeeps than most of the forum. I just respect my tools for what they do for me. Hell, my 3 year old cornwell impacts have been used daily and do not have so much as a scuff.

I'm the guy who wipes off each tool after use and puts them away.


And I'm still not going to torque using a chrome socket.


Basically, here is what I'm saying. The available head bolts are 12 point and have a very tall stud on them. They are torqued with a 1/2" torque wrench generally, so 3/8 socket is absolutely out of the question as an adapter will lose energy thus giving you in accurate feedback through the torque wrench, thus improper torque. Same goes for using chrome sockets in general.

Since that's the case, AND the rear driver firewall head bolt is a real bugger to get at, I recommend cutting off all unnecessary studs from the head bolts.

The reason the rear firewall head bolt is a bugger is that, even if you have access to a truck brand, the socket necessary is not cheap, and it I'd 1/4" too tall to allow you to get a torque wrench or ratchet on that particular head bolt.

If you can't understand this, having been laid out very simply, you should not be turning a wrench.

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Old May 7, 2014 | 07:02 PM
  #36  
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Originally Posted by CCKen
Yes.

Worked there from 1983 to 2001, when I took an early out retirement deal from Chrysler. Then I went back to work with them as a contract worker. Then when Edsel Ford II bought Pentastar Aviation from Chrysler, I stayed with them until 2007 where I retired for good. After 43 years in aviation I'd had enough.
Interesting. I was over that way many years ago, got to see the aviation museum shortly after it opened. I understand it isn't there anymore due to a fire or some such.
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Old May 7, 2014 | 11:15 PM
  #37  
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Originally Posted by Radi
Pentastar Aviation?
Chrysler did a number of aviation powerplants - including adapting a turbine engine to automotive applications, and doing an inverted V16 Hemi (~900cid, I think) in the late 1940s or early 1950s.
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Old May 8, 2014 | 12:58 AM
  #38  
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Originally Posted by 5-90
Chrysler did a number of aviation powerplants - including adapting a turbine engine to automotive applications, and doing an inverted V16 Hemi (~900cid, I think) in the late 1940s or early 1950s.
Chrysler built an 18 cylinder twin-radial hemi to power the B29's. Supercharged to over 2K horsepower each. I'd like to see that adapted to an automobile..

The thing that stood out about Chrysler back then is they'd get a wartime contract, engineer the cost down, and refund the excess money back to the government. These days cost overruns are so common they're considered SOP.
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Old May 9, 2014 | 11:28 PM
  #39  
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Originally Posted by Radi
Chrysler built an 18 cylinder twin-radial hemi to power the B29's. Supercharged to over 2K horsepower each. I'd like to see that adapted to an automobile..

The thing that stood out about Chrysler back then is they'd get a wartime contract, engineer the cost down, and refund the excess money back to the government. These days cost overruns are so common they're considered SOP.
A radial Hemi? I have GOT to see that! Please tell me you have pix...
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Old May 9, 2014 | 11:54 PM
  #40  
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Originally Posted by 5-90
A radial Hemi? I have GOT to see that! Please tell me you have pix...
I made a slight error- it was Pratt & Whitney that made the radial hemi aircraft motors. I found a 28 cylinder version with 56 sparkplugs too, never made it into a production plane though.
Chrysler's hemi offering for aircraft was, as you mentioned, a V16.

Perhaps the Sherman tank engines were the most awesome use of off-the-shelf parts: 5 Dodge 251-inline 6 truck engines in radial configuration:
Attached Thumbnails Anybody know why the 4.0 has studs on the head bolts?-9-sherman-tank-engine.jpg  

Last edited by Radi; May 9, 2014 at 11:57 PM.
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