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Old 11-03-13, 16:20   #1
Bro_Speed
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Installing ARP main and head studs.

Reading through past threads everyone seems to have their own idea on what the torque specs are for ARP main and head studs.

Here is the correct way of installing ARP studs.

Same for head and main studs

Take an Alan key and screw the stud into the block until it is at the bottom of the thread. Then firmly tighten. You can use lock tight on the block threads. its up to you.





Check to make sure all the studs are as deep as they can go. You can do this by eye but ive used a piece of timber to show you.



Next cover all contact surfaces of the nuts, threads and washers with ARP Ultra-Torque fastener assembly lubricant. DO NOT USE LOCKTIGHT.



Then lastly torque MAIN studs (200,000 PSI 10mm diameter) to 60ft lbs or 81nm in three equal stages following the sequence specified by the manufacturer ARP INSTRUCTIONS

And HEAD studs (200,000 PSI 7/16 inch diameter) to 80ft lbs or 110nm in three equal stages following the sequence specified by the manufacturer. ARP INSTRUCTIONS

There is no need to loosen and re-torque. To "to stretch the stud" ARP studs are designed so all elongation occurs in the elastic zone which means the stud will return to its original size once the force is removed. Once a stud stretches permanently (plastic zone) it is destroyed.

MLS head gaskets do not need re-torquing after a certain number of km driven or any time period. Other head gasket types may need re-torquing which is specified by individual manufacturers.

Last edited by Bro_Speed; 15-03-13 at 11:53.
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Old 15-03-13, 08:08   #2
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Originally Posted by Bro_Speed View Post
Here is the correct way of installing ARP studs.

Same for head and main studs

Take an Alan key and screw the stud into the block until it is at the bottom of the thread. Then firmly tighten. You can use lock tight on the block threads. its up to you.

Check to make sure all the studs are as deep as they can go. You can do this by eye but ive used a piece of timber to show you.

There is no need to loosen and re-torque. To "to stretch the stud" ARP studs are designed so all elongation occurs in the elastic zone which means the stud will return to its original size once the force is removed. Once a stud stretches permanently (plastic zone) it is destroyed.
I dont know who told you or why you think a stud should be screwed into the block TIGHT with Loctite, but this is incorrect.

A stud is designed to provide load axially by loading up on the back of all chamfers of the thread by having the stud installed finger tight, and not bottomed out!!! Dont put loctite on either its not required.

Also its good practice to cycle new fasteners to wear in the threads and get a more accurate torque reading.

And finally ARP Fasteners come with fastener specific instructions stating the bolt size and required torque anyway, if you read them you will also find they tell you to install finger tight
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Old 15-03-13, 08:16   #3
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Mods please sticky....for the LOL'S
Edited your original post.
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Old 15-03-13, 11:53   #4
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I dont know who told you or why you think a stud should be screwed into the block TIGHT with Loctite, but this is incorrect.

A stud is designed to provide load axially by loading up on the back of all chamfers of the thread by having the stud installed finger tight, and not bottomed out!!! Dont put loctite on either its not required.

Also its good practice to cycle new fasteners to wear in the threads and get a more accurate torque reading.

And finally ARP Fasteners come with fastener specific instructions stating the bolt size and required torque anyway, if you read them you will also find they tell you to install finger tight
The kits most people get for RB30's do not come with kit specific instructions. I cant find an ARP part number for RB30 kits. if you can show me one that would be great. Hand tight only gets them in a few threads, all the threads need to be engaged so they need to go to the bottom? some engine builders will locktight in the main studs. it is an option.
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Old 15-03-13, 13:06   #5
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The kits most people get for RB30's do not come with kit specific instructions. I cant find an ARP part number for RB30 kits. if you can show me one that would be great. Hand tight only gets them in a few threads, all the threads need to be engaged so they need to go to the bottom? some engine builders will locktight in the main studs. it is an option.
Hand tight will put them all the way in if you have cleaned all the threads with a chaser tap first, which you should do.

Loctite is ok provided you put them in finger tight and you torque them up before the loctite sets. But imo its not needed and just a pain pulling them out after.

Yea fair enough about the instructions was just talking in general. The kit people make up for RB30 is 202-3000 which is not a valid ARP part# the RB25 kit is 202-4301 which you could treat the same, and is the sheet you linked.

Last edited by Marzella; 15-03-13 at 13:08.
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Old 16-03-13, 10:12   #6
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You will also need to notch out one of the lugs on the rocker cover to clear the stud nuts on the spark plug side. Ill get a picture of mine and upload later
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Old 13-04-13, 11:12   #7
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This is where i notched my rocker to fit the ARP head studs. Thats on the spark plug ride right under the throttle body. I did it just with a thin metal blade on a 5" grinder

It hits on one of the washers/collars of the nut.

It only keeps it off a few mil, but thats enough to piss oil everywhere when you start it up!

Pull the gasket off and rest it down on the head, checking to make sure the touching everywhere and will form a tight seal.
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Old 22-03-15, 17:23   #8
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what are the part numbers for the arp main and head bolts for the rb30e?
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