I found the 1G FAQ at

http://www.vfaq.com/mods/headstuds.html

But cannot find a 2GNT ARP FAQ. I searched but couldn't find anything.

Is it the same?

Thanks for any help.

Edit:

I found this thread:

http://forums.2gnt.com/dcboard.php?az=set_threaded_mode&forum=8&page=&topic_id=64941&prev_page=show_mesg

Is this the most current/best info for pushing 15-20lbs with a built motor?

Sorry for being a post hore. I know it isn't tolerated on this board but I only want to tear this engine down once this month.

I just got off the phone with Al at ARP and he says that they should be torqued to 70 lbs if using arp lube and 85 lbs if using 30 weight.

Why is there so much of a difference in suggestions?

The socket used is a 9/16 deep well 12 point.

Nvm..

Jason|1997 Eclipse RS

I contributed to the wiki!

happy p'ple

Never mind.

I found this thread which is exactly what is happening to me:

http://forums.2gnt.com/dcboard.php?az=show_topic&forum=5&topic_id=103066&mesg_id=103066&page=&topic_page=1

Moderators can delete this thread please.

Jason|1997 Eclipse RS

I contributed to the wiki!

happy p'ple

Are you referring to the use of the moly lubricant and the 30w motor oil or the 70ft lbs recommended by ARP and the 90 ft lbs recommended by the 2gnt'ers?

The moly lubricant supplied is the best thing to use because when used properly the friction is reduced less then that if 30w motor oil was used, thus the need for less torque.
Directly from ARP's Website;
"when installing a new bolt where the stretch method cannot be used, the bolt should be tightened and loosened several times before final torque. The number of cycles depends on the lubricant. For ARP recommended lubes, five loosening and tightening cycles is sufficient"

more info can be found here http://www.arp-bolts.com/Tech/Tech.html

And as for the increased torque recommendation by the 2gnt'ers i don't know the exact reason, however i can guess and correct me if I am wrong, but the arp torque numbers are really for a NA motor if you turbocharge the motor the pressure in the cylinder is higher and a greater clamping load is needed to prevent head-gasket failure. Right now my head is off because of Head-gasket failure and i torqued the arp head studs to their recommended value so i might consider increasing the torque this time around (any suggestions?)

Just an FYI for everyone here. There used to be a 2GNT ARP FAQ on the main site. I don't see it there any more, but you can still link to it.

Anyways... the old 2GNT ARP FAQ lists individual part numbers to piece together a head stud kit for the 420A, but the studs are 7/16"-20 thread and undercut to 3/8". The new ARP kit for the 420A uses 7/16"-20 threads and is NOT undercut... the entire stud is 7/16".

Just thought I'd post it up since I just found out myself.

I did search for ARP FAQ and nothing came up.

Thanks again for the help.

ARP suggested 85 LBS using 30 weight or 70 lbs using ARP lube. Al said that this is 80% of the strength of the stude. He said the aluminum head will expand when heated and you will need to other 20% for this expansion.

The problem is that I did this last time and still have problems under boost.

Any input from the 420a God Terry?

ive re-used my arp head studs like 5 times now, and everytime, i use no oil or anything, and torque them to around 100ft lbs. i never blown a head gasket. but killed everything else.

I use ARP Moly lube and always torque to 90ft/lbs. I've never blown a headgasket doing this, either. I destroyed the pistons first.

I've also never lost threads in the block from it, either.

______________________________
If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.

'95 Eclipse TurboGS (garage deco)
'95 TSi AWD (restoring a survivor)
'97 Talon ESi-T (poor impulse control)
'99 Eclipse RS-T (daily beater)
'13 Evo X (mostly stock)
'17 Sienna (Middle Aged Dad Mobile)



Factory Service Manuals: http://nawdu.de/files/

______________________________
If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.

'95 Eclipse TurboGS (garage deco)
'95 TSi AWD (restoring a survivor)
'97 Talon ESi-T (poor impulse control)
'99 Eclipse RS-T (daily beater)
'13 Evo X (mostly stock)
'17 Sienna (Middle Aged Dad Mobile)



Factory Service Manuals: http://nawdu.de/files/

Thanks

I will use the same advice.

Thank you very much.

I edited to the wiki!

What about the ARP that come with the Eagle H beams? I can't remember what Eagle told me to torque them to when I called them. Might help out some others down the road though.

I have moved my headgasket questions to a new thread

http://forums.2gnt.com/dcboard.php?az=show_topic&forum=4&topic_id=89338&mesg_id=89338&page=