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Re: older style MP aluminum Hemi head torque
[Re: torkrules]
#253843
03/15/09 10:44 AM
03/15/09 10:44 AM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
master
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master
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
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I would be curious to hear other oppinions on this too. I was warned not to torque the valley studs to spec. as it would distort the intake runner and then loose sealing.
This was from a racer with a lot of hemi experience.
Mark
1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
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Re: older style MP aluminum Hemi head torque
[Re: Hemi Allstate]
#253844
03/15/09 11:02 AM
03/15/09 11:02 AM
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Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
torkrules
OP
I'm neurotic
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OP
I'm neurotic
Joined: Nov 2003
Posts: 2,715
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Quote:
I would be curious to hear other oppinions on this too. I was warned not to torque the valley studs to spec. as it would distort the intake runner and then loose sealing.
This was from a racer with a lot of hemi experience.
Mark
Yup, Ive heard the same thing. I've also heard:
75 on the deck/65 on the valley
65 all around
65 on the deck and 35-40 on the valley 
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Re: older style MP aluminum Hemi head torque
[Re: MIKECS]
#253846
03/15/09 11:25 AM
03/15/09 11:25 AM
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Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
torkrules
OP
I'm neurotic
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OP
I'm neurotic
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
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Quote:
Your wright the valley studs are to be torqued to 40lb.
If you listen to the TDG's they will tell you torque them to 75.
DO NOT LISTEN TO THE TDG'S.
40LB THATS IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
And to complete the puzzle......the deck studs are torque to......(insert answer here)
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Re: older style MP aluminum Hemi head torque
[Re: torkrules]
#253847
03/15/09 11:35 AM
03/15/09 11:35 AM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
master
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master
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
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I was told to go 70 -75 lbs with moly on the stage v. I can't remember what I used on the MP heads I had.  Mark
1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
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Post deleted by Defbob
[Re: MIKECS]
#253849
03/17/09 07:33 PM
03/17/09 07:33 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: older style MP aluminum Hemi head torque
[Re: torkrules]
#253850
03/17/09 07:45 PM
03/17/09 07:45 PM
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Joined: Jan 2003
Posts: 642
New Jersey
Craig
mopar
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mopar
Joined: Jan 2003
Posts: 642
New Jersey
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I was going (successfully) with the reduced number on the valley studs until a couple years ago when I had just the heads freshened with valves, springs, and a deck cut, and kept getting bad leakdown numbers after a full power run. Deck on block checked out flat. Found gasket embossing rings weren't crushing down at upper part of circle (steel shims, 1970s aluminum heads). Went to same torque on valley studs as head bolts and got good seal. That was after about 4 sets of head gaskets and cleaning, intake and header surface cleaning and sealing, etc, each time with good leakdown readings until after the first full power run. So I recommend same torque at all points, like the original service manual calls for. 
67 Dart, 426 Hemi, 9.23/145mph, 3400lbs, footbraked, owned since 1982
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Re: older style MP aluminum Hemi head torque
[Re: MIKECS]
#253854
03/17/09 09:31 PM
03/17/09 09:31 PM
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Joined: Sep 2003
Posts: 2,175
Duloc
The Shadow
top fuel
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top fuel
Joined: Sep 2003
Posts: 2,175
Duloc
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Quote:
I am glad you sleep all night. The valley stud torque has nothing to do with the block. The main issue is the seat in the head the more torque you put on the valley stud the more distortion is on the seat.
TDG = Typical Dode Guy
I have heard it affects both the block and head. That's one reason why world has increased the length of the valley boss on their new blocks.
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Re: older style MP aluminum Hemi head torque
[Re: MIKECS]
#253856
03/17/09 10:25 PM
03/17/09 10:25 PM
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Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
torkrules
OP
I'm neurotic
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OP
I'm neurotic
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
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Quote:
I am glad you sleep all night. The valley stud torque has nothing to do with the block. The main issue is the seat in the head the more torque you put on the valley stud the more distortion is on the seat.
TDG = Typical Dode Guy
The block thing can be a factor. I have seen two older original block crack the bosses when they were torqued to factory specs (75 lb.ft on the iron heads). The shop that was doing them reduced the torque on the inner studs to prevent this. This shop was also doing some of the dyno testing for Cummins when they were in Canada. They remember the inner studs being as tight as the deck studs even on the aluminum 528 engines.
Wow, what a can of worms!
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Post deleted by Defbob
[Re: torkrules]
#253857
03/17/09 10:32 PM
03/17/09 10:32 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: older style MP aluminum Hemi head torque
#253858
03/17/09 11:38 PM
03/17/09 11:38 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
master
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master
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
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I don't mean to hy jack, and this is the same topic.
What tool are you guys using for the valley stud twelve point nuts? I cannot find a 1/2" twelve point crows foot.
Mark
1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
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Re: older style MP aluminum Hemi head torque
#253859
03/17/09 11:41 PM
03/17/09 11:41 PM
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Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
torkrules
OP
I'm neurotic
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OP
I'm neurotic
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
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Quote:
So, which one of us is the TDG? Or, are we all TDG's?
I'd be a tPG (plymouth)
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Re: older style MP aluminum Hemi head torque
[Re: Hemi Allstate]
#253860
03/18/09 01:10 AM
03/18/09 01:10 AM
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Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
torkrules
OP
I'm neurotic
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OP
I'm neurotic
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
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Quote:
I don't mean to hy jack, and this is the same topic.
What tool are you guys using for the valley stud twelve point nuts? I cannot find a 1/2" twelve point crows foot.
Mark
Snap-on p/n FRDHI81. I use 9/16" 12 point nuts.
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Re: older style MP aluminum Hemi head torque
[Re: B G Racing]
#253862
03/18/09 08:35 AM
03/18/09 08:35 AM
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Joined: Mar 2005
Posts: 862
Iowa State fan
kilroy
super stock
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super stock
Joined: Mar 2005
Posts: 862
Iowa State fan
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Why torque a oem almn head different than an aftermarket head? Is it because the better deck(thicker) seals w/o as much torque? 40ft/lbs seems light, especally on a race motor? What are you differing on OEM style vs aftermarket?
1973 Charger, former SE, former auto
I'm not trying to be difficult, it comes naturally....
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Re: older style MP aluminum Hemi head torque
[Re: kilroy]
#253863
03/18/09 08:50 AM
03/18/09 08:50 AM
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Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing
master
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master
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Posts: 9,910
Eighty Four, PA
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Quote:
Why torque a oem almn head different than an aftermarket head? Is it because the better deck(thicker) seals w/o as much torque? 40ft/lbs seems light, especally on a race motor? What are you differing on OEM style vs aftermarket?
I'am referring to the after market like an Indy head that has a bolt rather than a stud in the lifter valley.A bolt clamps differently than a stud,you are friction loading as well as clamp loading and may pull the threads as well as distort the floor of the intake.There is a redundency as far as friction loading with a stud and the stud thread hole in an OEM style is a through hole whereas the Indy is a blind hole and it's termination is part of the intake floor. 
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