torque spec on arp head bolts sr20 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

vegas13silvia · 06-19-2009, 08:18 PM

im going to rebuild my motor and use arp head studs and i was wondering if anybody knows what the torque specs would be and also does anyone have a link for the torque specs or helms of the sr20 det that would help out alot

also i will be replacing my headgasket and i want to know which head gasket do you guys think will work great and what size mm should i use
and is there anything else that you guys would recommend i change or replace since im gonna be in there. i want a reliable sr for dd. im kinda new to the scene so any help is appreciated thanx

Chrischeezer · 06-20-2009, 09:22 AM

I have never seen a problem with the Cometic Head Gaskets

But I use a Cosworth Gasket

ARP head studs @ 85flbs with the ARP lube

jr_ss · 06-20-2009, 02:33 PM

Stay away from Cometic on the SR. I have heard so many bad things about them having issues sealing and what not on the SR. Perhaps it's people not taking the correct preparation steps for it or what not.

Apexi, Cosworth, Search...

As for ARP's 4-steps to 80lbs... all to 20, then to 40 and so on.

yabeet · 06-20-2009, 02:48 PM

http://zilvia.net/f/engine-tech/2597...que-specs.html

Here you go mate, just did the same a few weeks ago

vegas13silvia · 06-20-2009, 06:40 PM

thanx alot guys but as far as replacing any head components such as gasket seals is there anything i need to be worried about i know i have to change the head gasket but what else should i look out for

karforty5 · 06-20-2009, 06:49 PM

Do not go cometic! Apex 1.1 will be fine. I dont kno how much experience you have with head gasket replacements but make sure ur engines timing is set back properly and label every thing.

GSXRJJordan · 06-20-2009, 07:00 PM

Quote:

Originally Posted by vegas13silvia

thanx alot guys but as far as replacing any head components such as gasket seals is there anything i need to be worried about i know i have to change the head gasket but what else should i look out for

In my opinion, Power Enterprise makes the best head gaskets - but Apexi/HKS/Tomei/Greddy all make good products. Since they're all about the same price, I say go for the best one, PE.

As far as stuff to watch out for, it's always nice to replace the intake and exhaust mani gaskets - especially the exhaust mani->head gasket with a 7-layer from Nissan. You should have a valve job done, replace the seals, set lash, and have the head milled a tiny bit to ensure that it's flat.

If the block's out of the car, consider having it milled a tiny bit also... otherwise, you'll have to settle with just scuffing the surface and praying for a good seal lol.

McRussellPants · 06-21-2009, 11:49 AM

The new ARPs are shipping with instructions to torque to 105ft/lbs.

ARP tells you to go to 105 when you call them too, but half the time it'll break the stud.

We do 1/2in L19 studs to 110 so there was no way I was gonna do that, and 85 seems to work for everyone.

vespaman · 06-21-2009, 12:02 PM

on my arp instruction said to torque to 80ft/lbs in 3 equal steps with arp lube and 85ft/lbs with motor oil.

+1 for apexi metal head gasket

mattro · 06-21-2009, 12:10 PM

ive got the com on my sr. ill let you guys know how it works out

jr_ss · 06-21-2009, 03:27 PM

Quote:

Originally Posted by mattro

ive got the com on my sr. ill let you guys know how it works out

I'm assuming com is short for Cometic and we'll be waiting to hear how bad it leaks...

Just to get it out of the way, I told you so...

Ceepo · 06-21-2009, 07:13 PM

I have a Tomei hg love it, as for the studs do steps of 20lbs each till 80... for the studs into the head, just tighten them by hand and the nuts tight to 80lbs... with the arp lube...

240sxdrifted · 06-22-2009, 07:04 AM

quick question when you guys say cosmetic...is that the factory one that comes in oem gasket kit???

smelly240 · 06-22-2009, 07:18 AM

ITS COMETIC - NOT COSMETIC

Its a gasket manufacturer.

The stock on is papery crap. they arent very good.

knate · 06-22-2009, 11:39 AM

Go with whatever instructions are included with the studs. Old ARPs were ~80, new ones are 105. The new ones are a harder metal, so to be stretched enough to hold properly, they need to be torqued higher. If you torque the older ARPs to that spec it will overstretch or break them.

McRussel, you've had the new ones break on you? Mine were fine at that, but it is a little scary pulling that hard on them. Were you using the ARP lube?

smelly240 · 06-22-2009, 02:02 PM

with the arp lube the torque should be 85

i never torqued a headstud on a sr to 105 - especially a arp - they arent preloaded into the block (see golden eagle ones or greddy/cosworth/tomei ones - they have a dogpoint end that loads it in the block).

GSXRJJordan · 06-22-2009, 02:51 PM

Quote:

Originally Posted by smelly240

with the arp lube the torque should be 85

i never torqued a headstud on a sr to 105 - especially a arp - they arent preloaded into the block (see golden eagle ones or greddy/cosworth/tomei ones - they have a dogpoint end that loads it in the block).

Yeah pulling 100lb on anything that goes into aluminum is scary as shit, even if you go with the 1/2" ones.

vegas13silvia · 06-23-2009, 04:27 PM

thanx guys appreciate the help

06-19-2009, 08:18 PM	#1
vegas13silvia Join Date: Oct 2008 Location: las vegas Age: 36 Posts: 12 Trader Rating: (0) Feedback Score: 0 reviews	torque spec on arp head bolts sr20 im going to rebuild my motor and use arp head studs and i was wondering if anybody knows what the torque specs would be and also does anyone have a link for the torque specs or helms of the sr20 det that would help out alot also i will be replacing my headgasket and i want to know which head gasket do you guys think will work great and what size mm should i use and is there anything else that you guys would recommend i change or replace since im gonna be in there. i want a reliable sr for dd. im kinda new to the scene so any help is appreciated thanx

06-20-2009, 09:22 AM	#2
Chrischeezer Zilvia FREAK! Join Date: Jul 2005 Location: earth Age: 41 Posts: 1,406 Trader Rating: (2) Feedback Score: 2 reviews	I have never seen a problem with the Cometic Head Gaskets But I use a Cosworth Gasket ARP head studs @ 85flbs with the ARP lube __________________

06-20-2009, 02:33 PM	#3
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,415 Trader Rating: (35) Feedback Score: 35 reviews	Stay away from Cometic on the SR. I have heard so many bad things about them having issues sealing and what not on the SR. Perhaps it's people not taking the correct preparation steps for it or what not. Apexi, Cosworth, Search... As for ARP's 4-steps to 80lbs... all to 20, then to 40 and so on. __________________ My SR20VET Does your VTC gear rattle in your S14/15 SR? PM me.

06-20-2009, 02:48 PM	#4
yabeet Zilvia Member Join Date: Dec 2008 Location: Calgary Posts: 285 Trader Rating: (5) Rides Gallery: yabeet Feedback Score: 5 reviews	http://zilvia.net/f/engine-tech/2597...que-specs.html Here you go mate, just did the same a few weeks ago __________________ The thing is, it’s a gearbox, okay? It has one job to do! One job! Pull the lever… ‘Am I a pencil? Am I a cauliflower? Am I a nuclear power sta– I’m a gearbox! Oh, heavens, I’m gonna swap some cogs around!’ Jeremy Clarkson on Automatics

06-20-2009, 06:49 PM	#6
karforty5 Leaky Injector Join Date: Aug 2008 Location: Fort Lauderdale Age: 41 Posts: 136 Trader Rating: (4) Feedback Score: 4 reviews	Do not go cometic! Apex 1.1 will be fine. I dont kno how much experience you have with head gasket replacements but make sure ur engines timing is set back properly and label every thing. __________________ 6 Million ways to die, Choose 1

06-20-2009, 06:40 PM	#5
vegas13silvia Join Date: Oct 2008 Location: las vegas Age: 36 Posts: 12 Trader Rating: (0) Feedback Score: 0 reviews	thanx alot guys but as far as replacing any head components such as gasket seals is there anything i need to be worried about i know i have to change the head gasket but what else should i look out for

06-21-2009, 11:49 AM	#8
McRussellPants Nissanaholic! Join Date: Oct 2005 Location: Austin, Tx Posts: 2,168 Trader Rating: (0) Feedback Score: 0 reviews	The new ARPs are shipping with instructions to torque to 105ft/lbs. ARP tells you to go to 105 when you call them too, but half the time it'll break the stud. We do 1/2in L19 studs to 110 so there was no way I was gonna do that, and 85 seems to work for everyone.

06-21-2009, 12:02 PM	#9
vespaman Zilvia Addict Join Date: Sep 2006 Location: California Posts: 781 Trader Rating: (64) Rides Gallery: vespaman Feedback Score: 64 reviews	on my arp instruction said to torque to 80ft/lbs in 3 equal steps with arp lube and 85ft/lbs with motor oil. +1 for apexi metal head gasket __________________ IRRegular Kids!!!!

06-21-2009, 12:10 PM	#10
mattro Zilvia Junkie Join Date: Dec 2008 Location: henrietta, ny Age: 36 Posts: 478 Trader Rating: (4) Feedback Score: 4 reviews	ive got the com on my sr. ill let you guys know how it works out

06-21-2009, 07:13 PM	#12
Ceepo Nissanaholic! Join Date: Jan 2008 Location: Cedar City, Utah Posts: 2,007 Trader Rating: (9) Rides Gallery: Ceepo Feedback Score: 9 reviews	I have a Tomei hg love it, as for the studs do steps of 20lbs each till 80... for the studs into the head, just tighten them by hand and the nuts tight to 80lbs... with the arp lube... __________________ TW: http://zilvia.net/f/cars-sale/390459...d9s-coils.html

06-22-2009, 07:04 AM	#13
240sxdrifted Leaky Injector Join Date: Mar 2009 Location: Clinton MD,NOVA Age: 38 Posts: 145 Trader Rating: (0) Feedback Score: 0 reviews	quick question when you guys say cosmetic...is that the factory one that comes in oem gasket kit???

06-22-2009, 07:18 AM	#14
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 47 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	ITS COMETIC - NOT COSMETIC Its a gasket manufacturer. The stock on is papery crap. they arent very good. __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

06-22-2009, 11:39 AM	#15
knate Leaky Injector Join Date: Feb 2005 Location: Washington Posts: 140 Trader Rating: (0) Feedback Score: 0 reviews	Go with whatever instructions are included with the studs. Old ARPs were ~80, new ones are 105. The new ones are a harder metal, so to be stretched enough to hold properly, they need to be torqued higher. If you torque the older ARPs to that spec it will overstretch or break them. McRussel, you've had the new ones break on you? Mine were fine at that, but it is a little scary pulling that hard on them. Were you using the ARP lube?

06-22-2009, 02:02 PM	#16
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 47 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	with the arp lube the torque should be 85 i never torqued a headstud on a sr to 105 - especially a arp - they arent preloaded into the block (see golden eagle ones or greddy/cosworth/tomei ones - they have a dogpoint end that loads it in the block). __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

06-23-2009, 04:27 PM	#18
vegas13silvia Join Date: Oct 2008 Location: las vegas Age: 36 Posts: 12 Trader Rating: (0) Feedback Score: 0 reviews	thanx guys appreciate the help