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Hemi Intake Bolt #2529840
08/01/18 08:11 AM
08/01/18 08:11 AM
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North Carolina USA
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smuggler Offline OP
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smuggler  Offline OP
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Anyone know the month in 1968 when Chrysler made the change from allen-headed to hex-headed bolts on hemi engines
Thanks

Re: Hemi Intake Bolt [Re: smuggler] #2530147
08/01/18 07:17 PM
08/01/18 07:17 PM
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Sacramento CA
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Morty426 Offline
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My Charger was built September 67 and it has allen heads

Re: Hemi Intake Bolt [Re: smuggler] #2530279
08/01/18 11:58 PM
08/01/18 11:58 PM
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Spokane Washington
ScottSmith_Harms Offline
Mr Wizzard
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First off I'll say "I don't know". But it did happen sometime mid year.

My best guesstimate would be January 68 which would coincide with the new 68 block castings being made (associated engine assembly parts might have been changed/upgraded at this same time).

Re: Hemi Intake Bolt [Re: smuggler] #2530303
08/02/18 01:19 AM
08/02/18 01:19 AM
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So Near, Yet So Far
topside Offline
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So Near, Yet So Far
My SPD 9/30/67 had allen heads, but the car was rubbed on from pretty much as soon as it came home according to a log the original owner kept.

Re: Hemi Intake Bolt [Re: smuggler] #2530352
08/02/18 07:04 AM
08/02/18 07:04 AM
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robertop Offline
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The first Hemi installed at Lynch Road on 7/28/68 had (and still has) hex head bolts. Period.

Re: Hemi Intake Bolt [Re: smuggler] #2530456
08/02/18 01:28 PM
08/02/18 01:28 PM
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Chicago Blackhawks
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hemicar1971 Offline
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You would think there would be a breaking point in a parts book when this part was changed but not likely with Chrysler. There also would be paper work sent to the plant of assembly but that was 50 years ago. The place were I worked in Automotive Production this process is called a PRN that tells of the change with process and part for the line worker. This creates a Breaking Point and that engine would of been written down with various information from it such as VON, SEQ, FON, VIN, plant, shift, time if that information was generate in the plant of change. Sometimes none of this stuff would of made a breaking point because it was an out of Assembly Plant change and the motor plant would of taken care of the change and might of not generated a breaking point parts book change.


1971 HEMI E BODY REGISTRY
Re: Hemi Intake Bolt [Re: smuggler] #2530478
08/02/18 02:03 PM
08/02/18 02:03 PM
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central il.
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second 70 Offline
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central il.
My guess is it changed when they ran out of old bolts. When I restored a 65 vette it had the julian dated shocks on it with bolts that were wrong by ncrs records. Come on nobody changes all the bolts on the original shocks they where left over bolts from 64. Also had 2 different head marked bolts that could be used for bumpers right side had one left side had the other. It was whatever barrel they rolled out of stock when the ran out.

Mike

Re: Hemi Intake Bolt [Re: second 70] #2530520
08/02/18 03:20 PM
08/02/18 03:20 PM
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North Carolina USA
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smuggler Offline OP
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Thanks all!!

Just found reference in Dave Wise's B-body resto book that states 68's produced before October 1968 had allen intake bolts and after had hex. I think this is might be a misprint in the book since Oct 68 builds would be 69 production year. Maybe intended to say instead (also in agreement with Scott) "January 1968."

But I also agree with all that they probably used whatever they had on hand at the time so it would possibly vary car-to-car.

thanks again all!

Re: Hemi Intake Bolt [Re: smuggler] #2535927
08/13/18 11:56 PM
08/13/18 11:56 PM
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VA
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dragon slayer Offline
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So how does that help you, your making an assumption on the book error. Frankly you still do not really know.

Re: Hemi Intake Bolt [Re: dragon slayer] #2535949
08/14/18 12:34 AM
08/14/18 12:34 AM
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Posts: 42,714
Spokane Washington
ScottSmith_Harms Offline
Mr Wizzard
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Mr Wizzard

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Spokane Washington
I'm not sure what Dave's intent was but I can assure you that it was a mistake, no 68 vehicles where built in October of 68, 1968 production ended months before that.







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