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Headstuds. MAP H11 vs ARP L19

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Old Apr 14, 2014 | 08:26 AM
  #46  
Adam Brunson's Avatar
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Sorry for all the confusion, there was a typo on the install guide on our website. This was in reference to the 8740 studs we used to offer, while using the International #2 compound.

Moving forward, please torque your studs to 85ft/lbs with the 45 x 3 on/off sequence prior to final torque. This is if you are using the included assembly torque lube.

Installation guide will be updated on the site as well.

If you have any questions feel free to pm me directly or email me at adam@maperformance.com

Thanks,
Adam
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Old Apr 14, 2014 | 08:48 AM
  #47  
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Thank you! That makes me feel a lot better as I choose to listen to the included instructions in the box which specified 85 ft/lbs with the use of the International Compound #2.
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Old Apr 14, 2014 | 08:52 AM
  #48  
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FYI looks like the value has been changed however the new number is 70 ft/lbs http://www.maperformance.com/tech/wp...P-EVO-UDHS.pdf

We now know the correct number but you may want to make sure that change is reflected correctly for future customers
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Old Apr 14, 2014 | 10:57 AM
  #49  
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Originally Posted by Adam Brunson
Sorry for all the confusion, there was a typo on the install guide on our website. This was in reference to the 8740 studs we used to offer, while using the International #2 compound.

Moving forward, please torque your studs to 85ft/lbs with the 45 x 3 on/off sequence prior to final torque. This is if you are using the included assembly torque lube.

Installation guide will be updated on the site as well.

If you have any questions feel free to pm me directly or email me at adam@maperformance.com

Thanks,
Adam
I have a question related with the torque procedure. Should I follow with OEM specifications that Mitsubishi recommends on how to apply the torque but with your recommended torque? The manual says the following:

- Tighten the bolts to the specified torque 78 ± 2 N⋅m (58 ± 1 ft-lb), using the tightening sequence shown.
- Loosen all bolts fully in the reverse order of tightening.
- Retighten the loosened bolts to 20 ± 2 N⋅m (15 ± 1 ft-lb) in the tightening sequence shown.
- Make a paint mark across each bolt head and cylinder head.
- Tighten the cylinder head bolts 90 degree angle in the specified order.
- Tighten the bolts another 90 degree angle in the same order as in step 7, and check that the paint marks on the cylinder head bolt are aligned with the paint marks on the cylinder head.

Specially the part that says that the bolts should be tightened 180 degree after the torque has been achieved.
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Old Apr 14, 2014 | 11:05 AM
  #50  
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That procedure is specific to using the factory head bolts as they are torque to yield/ torque to stretch whatever you wish to call them

Using headstuds like in the case of the studs that MAP sells I would just tq them to theeir specs being ultimately torques to 85 ft/lbs. Just be careful when you are torquing them as well as loosening them up that you follow the correct removal order and tightening pattern so you ensure proper seal without warping the head.

It sounds like you have the FSM but if you don't I will try and find the link to the specific order. In a nutshell when torquing them down you work your way from the inside outward and when unbolting them you work your way outward in.
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Old Apr 14, 2014 | 12:02 PM
  #51  
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Thanks heel2toe for the information, I was worry about it because I couldn't find information related with torque procedure. Also I have read about some guys that have installed the studs without remove the head with no problems.
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Old Apr 14, 2014 | 12:45 PM
  #52  
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No problem. I would not recommend doing head studs unless you pull the head. Oh and in case you dont have it here is the stud removal and reassembly order: https://www.evolutionm.net/forums/10123091-post6.html
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Old Apr 15, 2014 | 07:08 AM
  #53  
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Originally Posted by heel2toe
FYI looks like the value has been changed however the new number is 70 ft/lbs http://www.maperformance.com/tech/wp...P-EVO-UDHS.pdf

We now know the correct number but you may want to make sure that change is reflected correctly for future customers
This is the link from the product page that has been updated.

http://www.maperformance.com/tech/ma...llation-guide/

The pdf you have, where did you pull that from? It shouldn't be linked anywhere that is why it hasn't changed.
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Old Apr 15, 2014 | 07:27 AM
  #54  
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Right at the bottom of the page which you just hyperlinked, it says, "Download the PDF below!"
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Old Apr 16, 2014 | 08:08 AM
  #55  
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Pshhh! That is what I get for not scrolling when I reach the information I needed to edit.

I had the .PDF removed, as all information is in the post.

Thanks for the heads up, hope everyone is all sorted now.

Cheers,
Adam
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Old Apr 16, 2014 | 10:02 AM
  #56  
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No worries, glad I could help out
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