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7 Bolt Arp Headstuff Install Question #327189
March 29, 2010 12:17 am UTC
March 29, 2010 12:17 am UTC
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Etobicoke
James Karban Offline OP
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I've reinstalled the head, and I used the supplied Arp Moly lube as directed.

I torqued the head in proper sequence, and in three steps. First to 25, 45 and final value of 85 foot pounds.

Am I supposed to retighten these bolts after the a few heat cycles? or do I just leave everything alone and close it up?

I need some expert opionions here.

thanks


2005 BMW 330ci ZHP

---Sold----
1997 GST Spyder
1997 Talon AWD
Re: 7 Bolt Arp Headstuff Install Question [Re: James Karban] #327200
March 29, 2010 02:36 am UTC
March 29, 2010 02:36 am UTC
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Trenton, On, Canada.
Ghislain Goudreau Offline
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Hello James

Some Head Gaskets require retorque; you should be able to read that information on the Head Gasket pakaging.

I personally rarely retorque a Head Gasket and never had problem.

Torqing the Head like you did helped spreading the load evenly so I would tend to say that it is not required.

Ghislain


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Re: 7 Bolt Arp Headstuff Install Question [Re: Ghislain Goudreau] #327581
April 03, 2010 01:19 pm UTC
April 03, 2010 01:19 pm UTC
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Jonathan Beaton Offline
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I only really do stock rebuilds at work and have yet to do one that requires a retorque. If you're doing it yourself and can retorque for free I recommend doing it as a precautionary step.

Even if it does nothing for your car, it'll make you feel better.

Re: 7 Bolt Arp Headstuff Install Question [Re: Jonathan Beaton] #327610
April 03, 2010 09:32 pm UTC
April 03, 2010 09:32 pm UTC
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KEVIN KIRELUK Offline
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I personally always re-torque normal ARPs after a couple heat cycles.

When installing the studs, did you bottom them out and then back them off 1/4 turn?


TPG+Meth
You can't tune out mechanical problems!!!
Re: 7 Bolt Arp Headstuff Install Question [Re: KEVIN KIRELUK] #327839
April 07, 2010 03:01 am UTC
April 07, 2010 03:01 am UTC
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James Karban Offline OP
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Everything is running good, headgasket install was a success. I'll be taking off the valve cover just to double check that the torque specs still match.




2005 BMW 330ci ZHP

---Sold----
1997 GST Spyder
1997 Talon AWD
Re: 7 Bolt Arp Headstuff Install Question [Re: KEVIN KIRELUK] #327840
April 07, 2010 03:08 am UTC
April 07, 2010 03:08 am UTC
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Deep Mann Offline
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Originally Posted by KEVIN KIRELUK
I personally always re-torque normal ARPs after a couple heat cycles.

When installing the studs, did you bottom them out and then back them off 1/4 turn?


Hey Kevin what do you mean by bottoming them out? You suppose to bottom the stud out confused I need to know because I am doing my HG soon


1998 Tsi Awd 10.6@134

Re: 7 Bolt Arp Headstuff Install Question [Re: Deep Mann] #327846
April 07, 2010 03:53 am UTC
April 07, 2010 03:53 am UTC
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Ajax, ON
Reza Mirza Offline
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He means don't bottom the arp stud right into the bottom of the block. Back it off about a 1/4 turn once it hits the bottom.

This ensure that torque is applied evenly on the threads of the stud, and not just the first few mm's below the deck surface wink


1G DSM: 1000+ AWHP, 9.2@162.83 MPH
Evo X: 746 AWHP, XR9569S pump gas
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Re: 7 Bolt Arp Headstuff Install Question [Re: Reza Mirza] #327848
April 07, 2010 04:08 am UTC
April 07, 2010 04:08 am UTC
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Deep Mann Offline
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Alright I looked back at a thread and I understand what your saying rotate But should each STUD bottom out at the same level or they would be different ? and use only the hand to tighten them ? because last time I think I sent those mofo's down with a hand RATCHET shuffle and each of them would go down more than tightening with hand


1998 Tsi Awd 10.6@134

Re: 7 Bolt Arp Headstuff Install Question [Re: Deep Mann] #327852
April 07, 2010 12:47 pm UTC
April 07, 2010 12:47 pm UTC
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Reza Mirza Offline
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They should bottom out at relatively the same level. If you seen one stud higher than others, that means there was most likely oil or coolant in that hole which was preventing it from going down further.

You need to clean out the holes in the block properly, and probably blow some compressed air into them to get any debri out. Sometimes a tap is even needed to chase the threads.


1G DSM: 1000+ AWHP, 9.2@162.83 MPH
Evo X: 746 AWHP, XR9569S pump gas
www.dynotuneracing.com




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