avotegra

WHAT TORQUE SPEC IS FOR THE ARP HEAD STUD....ON A B18C1...I SEE 60 BUT THE PAPER SAY 80. AND WHAT IS THE Pattern on who to torque the head to the block.........like.......what needs to be torque first.........please help..........

MidShipCivic

60ft lbs is when using ''ARP Moly Lube'' and 80ft lbs is when using engine oil.

Torque in 3 steps 10-20 wait for a bit (15-20mins) loosen then do it again all the way to a max of 60ft lbs. ( I do this process 3 times on heads & mains) Reason is because stud stretch for each individual stud is irregular. You'll notice after torquing all heads studs then loosening them that you don't use the same force loosening them.


Torque sequence image below.

Eklsv-t

iTrader: (1)

we torque my gsr head with arp head studs 70ilb and it holds up fine, it ran hard at the track and daily driver boosting 15pounds

patrick4588

iTrader: (1)

yeah i put mine at 70, thats what laskey racing recommends i believe

avotegra

are you sure....cuz on the paper that arp send it........it says 80 with the lube and 85 with 10w30 or 5w30 cant remember..........if it is then 60 is too low..........

patrick4588

iTrader: (1)

i know for a fact the mains are 70. i have a brand new box of head studs in my room, ill go check and see what it says for ya

patrick4588

iTrader: (1)

ok, quoting from the paper:
preload torque recommendations
A)torque values are based on 75% of the fasteners yield strength. use the manufacturers torque sequence but do not use the engine manufacturers torque specs. torque the nuts to 70 ft lbs for arp moly assembly lubricant or torque to 85 ft lbs with 30wt motor oil.
b) due to the expansion rate of ALUMINUM, it is recommended that the torque should be 65 ft lbs with arp moly assembly lubricant.

chubz0r

So, we should torque them to what then? Lol, so many different answers in here. Also, sorry if this is noob but its my first time with the head off, do the washers go between the head and block? or between the head and nut?

And do I just hand tighten the studs into the block, then torque it down with the head? What is the correct way to do so?

Sorry for thread jack. Thanks in advance.

patrick4588

iTrader: (1)

the washers go between the head and nut... lets use a little common sense. use a thread chaser to get any gunk out of the threads and hand tighten the studs in. then torque it in sequence first to 20 ft lbs, then 40, then the final 70 if using arp lube. if you use engine oil, go 30, 60, 85.

chubz0r

Lol, thats right, I dont know how that got into my head. Ah, I saw a pic earlier of a block with the washers around the studs resting on the deck, just threw me off i guess. Lol.

Thanks.

avotegra

what........i though due to the expansion rate of ALUMINUM, you said 60....now 70..........please what is the right way of doing this......need to know.......dont wanna over tight or too lose..........

MidShipCivic

:Sighs: mannn just go and do what one of us said or just FOLLOW what tq spec it says on the paper with ARP MOLY LUBE....


or

Just do w/e the hell you want.

Eklsv-t

iTrader: (1)

Torque it 70 with arp molylube bro. Trust me bro, My friend, me, torque 70 and boost 15 pounds daily

ahobbs

im puting this in the FAQ. just needed to bump it for my subscribed items

b20beast83

when hand tightening it, wont ie be loose?
Cant vibrations make it slack

bigD

When tightning by hand I like to torque the studs to 10ft lbs

hondaapi

Yesterday I also wanted to assemble some blocks.

The paper with the 80 Ft.lbs tourque specs seems to be new in some ARP boxes.
In the older boxes they recommended something else.

Maybe they changes the material or they notices problems with the old lower tourquw specs.

Does someone know more about it?

ahobbs

talked to a few people that build motors and used these often and they got 78-80 with molly lube

hayabusa160

i did 76 on a ls motor. runs great. lol

Ls_dx

iTrader: (5)

I do steps with a final of 65-70 with moly lube on the nuts washer and stud thread.

justinsane

I just got my head(b18c1) back from laskey racing. I bought the ARP Head Studs and Mike Laskey recommended I torque them to 80 ft/lbs in 3 step increments w/ ARP moly lube on the threads nuts and washers. Then retorque the bolts after 500-1000 miles or so. I even asked him if 70 was ok but he said "I would go ahead and take it on up to 80 ft/lbs with the moly lube"

Mike Laskey's opinion is basically the bottom line for me. Laskey's reputation speaks for itself.

ahobbs

yes thats all right but the only thing is the re-torque. if your using a stock 3 ply headgasket there is not need to re-torque.

do 25-50-80 and your set.

eleon

Stud snapped at 70!!! Fml

sc34dc4

iTrader: (1)

I don't see how that's possible considering ARP's final torque spec is 80ft/lbs on their head studs when using thier moly lube. 25-50-80

Gunmetal_B20_Hatch

iTrader: (9)

x2

Ive never heard of an ARP stud breaking when torquing.