Head install question
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 6,642
Likes: 450
From: Texarkana Texas
Head install question
I am helping a friend put new heads on his 02 Z06. They are PRC heads. The question is....he is putting ARP studs in. Do you use the ARP lube or can you just put oil on them.
2nd question. One side of his engine has studs, the other has bolts (evidently, a previous owner messed up something somewhere). How far do the studs thread into the block? Do they bottom out?
Any info would be greatly appreciated.
2nd question. One side of his engine has studs, the other has bolts (evidently, a previous owner messed up something somewhere). How far do the studs thread into the block? Do they bottom out?
Any info would be greatly appreciated.
Racer
Joined: Jan 2013
Posts: 377
Likes: 0
From: Jasper Texas
St. Jude Donor '13
I agree with grantv, if you're not sure; contact the manufacturer. But IMHO, the ARP provided lube is probably just machine oil without any of the additives found in engine oil. Either will work fine just don't overdo it, you don't want an accumulation of oil in the bolt holes. The purpose of the lube is to reduce friction on the threads during torquing in order to get a more accurate result. I would just snug the studs onto the block, the torquing proccess will most likely bottom them out. Remember it's an aluminum block so the more thread inserted, the better the connection executed.
That's my 2 cents worth.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I am helping a friend put new heads on his 02 Z06. They are PRC heads. The question is....he is putting ARP studs in. Do you use the ARP lube or can you just put oil on them.
2nd question. One side of his engine has studs, the other has bolts (evidently, a previous owner messed up something somewhere). How far do the studs thread into the block? Do they bottom out?
Any info would be greatly appreciated.
2nd question. One side of his engine has studs, the other has bolts (evidently, a previous owner messed up something somewhere). How far do the studs thread into the block? Do they bottom out?
Any info would be greatly appreciated.
A few years back, ARP improved their lube. It provides pretty accurate preload values from torque and is very specific for this purpose. It is not lube oil. Torque is a very imprecise way to measure bolt preload, but they have done a lot of research and their lube is the only way to go. Don't use oil.
The studs are to be lubed and then screwed in until they bottom. I will usually screw in until bottomed and then back off 1/4 turn. Also, make sure the threads are clean (ARP makes a thread chaser for this, don't use a tap) and make absolutely sure there is no coolant in any of the bolt holes. That will result in a cracked block.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
A few years back, ARP improved their lube. It provides pretty accurate preload values from torque and is very specific for this purpose. It is not lube oil. Torque is a very imprecise way to measure bolt preload, but they have done a lot of research and their lube is the only way to go. Don't use oil.
The studs are to be lubed and then screwed in until they bottom. I will usually screw in until bottomed and then back off 1/4 turn. Also, make sure the threads are clean (ARP makes a thread chaser for this, don't use a tap) and make absolutely sure there is no coolant in any of the bolt holes. That will result in a cracked block.
The studs are to be lubed and then screwed in until they bottom. I will usually screw in until bottomed and then back off 1/4 turn. Also, make sure the threads are clean (ARP makes a thread chaser for this, don't use a tap) and make absolutely sure there is no coolant in any of the bolt holes. That will result in a cracked block.
As vettenuts stated,,, check, check and double check for dirt and moisture/coolant in the block bolt holes and use the correct ARP lube!
Bill
Melting Slicks
Joined: Nov 2013
Posts: 2,048
Likes: 315
From: USA
ARP lube.... bottom them out, hand-tight, nothing crazy. All of this info is in the instruction sheet...
Studs: http://arpinstructions.com/instructions/234-4316.pdf
Bolts: http://arpinstructions.com/instructions/134-3609.pdf
Studs: http://arpinstructions.com/instructions/234-4316.pdf
Bolts: http://arpinstructions.com/instructions/134-3609.pdf
Melting Slicks
Joined: Jun 2005
Posts: 2,396
Likes: 52
From: Sicamous BC
Don't forget the ARP Thread sealer for the studs going into the block so you don't want to wonder why antifreeze is leaking from the studs latter. The ARP lube is very different from oil, myself I would not second guess the manufacturer & go with their product's.
I've just had my heads off/on for the third time & the studs are very nice vs bolts. Just a torque spec, easy on & off
I've just had my heads off/on for the third time & the studs are very nice vs bolts. Just a torque spec, easy on & off
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Don't forget the ARP Thread sealer for the studs going into the block so you don't want to wonder why antifreeze is leaking from the studs latter. The ARP lube is very different from oil, myself I would not second guess the manufacturer & go with their product's.
I've just had my heads off/on for the third time & the studs are very nice vs bolts. Just a torque spec, easy on & off
I've just had my heads off/on for the third time & the studs are very nice vs bolts. Just a torque spec, easy on & off
ALL,, LS blocks have or are suppose to have BLIND HEAD BOLT HOLES. That is why it is CRITICAL to insure that the head bolt holes are clean and free of any liquids.
IF,, you were to attempt to TORQUE a GM OEM Head Bolt in the block and the bolt hole had LIQUID or dirt in the hole, 99% of the time, the block will fracture at the bottom of the head bolt hole.
Bill
Last edited by Bill Curlee; Mar 10, 2015 at 08:45 PM.
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Melting Slicks
Joined: Jun 2005
Posts: 2,396
Likes: 52
From: Sicamous BC
I've used the thread sealant on the studs & nice part is each time I've had the heads off hardly any studs come loose. A little more difficult cleaning up around the studs but it's minor not chasing each & every bolt hole 