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Old 10-11-2007, 01:57 PM   #1
nperkins
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Join Date: Dec 2006
Chapter/Region: NESIC
Location: Griswold, CT
Vehicle:
90 Miata
04 Evo Rally Car

Default ARP Head Studs... Are they seated enough??

Im in the middle of reassembling my motor out of my 04 STi (Did Head Gaskets)... On the passenger side, one head stud was fairly difficult to install, and finger tightening all of the studs left them at different heights... I ended up having 4 1/8" from deck height to top of the stud on the passenger side... I didnt feel comfortable going any more as it would have taken alot of force (Took 2 hours of working 1 stud back and forth to get it to that height)...


The drivers side threaded in much easier, and ended up at 3 7/8" from deck to top of stud without much difficulty... Is it okay that I have them 1/4" difference?

There doesnt appear to be any type of cam interference or anything on the passenger side, so I dont see any reason it wont work...
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Old 10-11-2007, 02:06 PM   #2
SloRice
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701whp 9.91@146

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you want to have them seated all the way down. pull the head studs out that haven't bottomed out and run some compressed air into the holes...you might have some water or something down in them.
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Old 10-11-2007, 02:20 PM   #3
wrxzzz
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You should remove all the studs and chase the threads to clean them out very thourouhgly. Sears sells a thread chasing kit you can use. This is important because if the threads aren't clean then your torque measurements don't mean a thing. Also clean the threads on your studs and put the lubricant the manufacturer calls for on them. Then thread and torque them in the order called for in the service manual.
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Old 10-12-2007, 06:23 AM   #4
Legacy_H6TT
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Quote:
Originally Posted by wrxzzz View Post
You should remove all the studs and chase the threads to clean them out very thourouhgly. Sears sells a thread chasing kit you can use. This is important because if the threads aren't clean then your torque measurements don't mean a thing. Also clean the threads on your studs and put the lubricant the manufacturer calls for on them. Then thread and torque them in the order called for in the service manual.
2nd that. Make sure your threads are spotless. ARP actually give the correct torque figures with the studs, so make sure you follow them, it will be the one for 10mm studs... If you don't have any of the lube that comes with the studs, thin engine oil is ok to use.
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Old 10-13-2007, 09:08 AM   #5
crashtke
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Might find this thread of interest...http://wrxatlanta.com/forums/showthr...t=15209&page=2

It is a little discussion on ARP studs.
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