Rocker arm studs
Thread Starter
Instructor
Joined: Sep 2018
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From: US
Rocker arm studs
Hi all,
I purchased ARP rocker arm studs and want to mke sure I install them correctly. As I understand, you lube the base threads and screw them in hand tight until it stops, then use a Allen wrench and go an 1/8 or 1/4 turn past that. Lube the upper part and then proceed to installing the rockers. (Head bolt holes are already clean) Am I missing something?
TIA
I purchased ARP rocker arm studs and want to mke sure I install them correctly. As I understand, you lube the base threads and screw them in hand tight until it stops, then use a Allen wrench and go an 1/8 or 1/4 turn past that. Lube the upper part and then proceed to installing the rockers. (Head bolt holes are already clean) Am I missing something?
TIA
Race Director
Joined: Oct 2004
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I guess you're not missing anything. I was unaware ARP offered rocker studs. I thought they only had rocker bolts. Oh well, learn something new every day. I will say the stock bolts are 12.9 grade, and I've never heard of any of them failing.......
Tech Contributor
Joined: Jan 2007
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From: Dyer, IN
Hi all,
I purchased ARP rocker arm studs and want to mke sure I install them correctly. As I understand, you lube the base threads and screw them in hand tight until it stops, then use a Allen wrench and go an 1/8 or 1/4 turn past that. Lube the upper part and then proceed to installing the rockers. (Head bolt holes are already clean) Am I missing something?
TIA
I purchased ARP rocker arm studs and want to mke sure I install them correctly. As I understand, you lube the base threads and screw them in hand tight until it stops, then use a Allen wrench and go an 1/8 or 1/4 turn past that. Lube the upper part and then proceed to installing the rockers. (Head bolt holes are already clean) Am I missing something?
TIA
What ARP p/n are you installing?
Thread Starter
Instructor
Joined: Sep 2018
Posts: 125
Likes: 42
From: US
Tech Contributor
Joined: Jan 2007
Posts: 19,398
Likes: 1,139
From: Dyer, IN
Ok, so you DO have the specific instructions from ARP. I had to look them up, because I did not remember any statement regarding turning the studs an additional 1/8-1/4 past hand tight.......and obviously it does not state that. Just remember to use the ARP lube, and do not torque down on an open valve.
Thread Starter
Instructor
Joined: Sep 2018
Posts: 125
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From: US
Ok, so you DO have the specific instructions from ARP. I had to look them up, because I did not remember any statement regarding turning the studs an additional 1/8-1/4 past hand tight.......and obviously it does not state that. Just remember to use the ARP lube, and do not torque down on an open valve.
Thank you, I did call ARP just to confirm the supplied directions tucked very neatly behind the studs.
They mentioned on some of the cylinder head studs they call for the extra 1/4 turn but not these. Just hand tight like it said and it's ok to throw a little ultra torque on the threads.
Tech Contributor
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From: Dyer, IN
Race Director
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^^^^^^^^THIS!!^^^^^^^ To the OP-Every time I've torqued any ARP studs or bolts, I have used ARP Moly lube on the threads and one side of the washer, always on the nut side, NOT on the head side. ARP is adamant on using their assembly lube. If you don't use it, you're torque readings will be incorrect, period.
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Thread Starter
Instructor
Joined: Sep 2018
Posts: 125
Likes: 42
From: US
Thread Starter
Instructor
Joined: Sep 2018
Posts: 125
Likes: 42
From: US
^^^^^^^^THIS!!^^^^^^^ To the OP-Every time I've torqued any ARP studs or bolts, I have used ARP Moly lube on the threads and one side of the washer, always on the nut side, NOT on the head side. ARP is adamant on using their assembly lube. If you don't use it, you're torque readings will be incorrect, period.
Race Director
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Personally, I NEVER use oil or any lube on my ARP head studs on the end that screws into the block. If you use oil or lube on those threads, and some gets between the end of the stud and the block, you can crack the block if you try tightening the studs with a little too much muscle. That can't happen if they're put in dry. There's simply no need to put any lube on the threads that go into the blind holes.......
Le Mans Master
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Personally, I NEVER use oil or any lube on my ARP head studs on the end that screws into the block. If you use oil or lube on those threads, and some gets between the end of the stud and the block, you can crack the block if you try tightening the studs with a little too much muscle. That can't happen if they're put in dry. There's simply no need to put any lube on the threads that go into the blind holes.......
P.S very very important that the threads are absolutely clean and easy turning when installed. If there is any resistance take out the stud and clean threads again. There should be smooth and consistent install.
Tech Contributor
Joined: Jan 2007
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From: Dyer, IN
Personally, I NEVER use oil or any lube on my ARP head studs on the end that screws into the block. If you use oil or lube on those threads, and some gets between the end of the stud and the block, you can crack the block if you try tightening the studs with a little too much muscle. That can't happen if they're put in dry. There's simply no need to put any lube on the threads that go into the blind holes.......
Never in my non-professional or professional career have I seen an assembly crack(of any material) as a result of a blind hole accepting a properly lubricated/torqued fastener.....whether that lubrication was in the form of oil, anti-sieze, loctite, etc.
Race Director
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Yes, I know he's talking rocker arm studs. But the principle is the same. I think your statement is absolutely true, with emphasis on "properly lubed/installed." I have seen hydraulic cracks on LS engines before in online pics, though never personally. But I never use lube on any threaded fasteners that thread into blind holes when using studs. Eliminates the hydraulic angle. Certainly do use ARP lube on the ends that have a torqued fastener. Though I never use lube on the factory rocker bolts. Never had any issues. Nothing stripped, nothing comes loose. Works for me.
Tech Contributor
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From: Dyer, IN