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LT1-LT4 Modifications
1993-97 Gen II Small Block V8

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Old 05-22-2009, 02:42 AM   #1
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Default Lt1 arp head studs

how exactly do you guys lock them down completely...do you use loctite or thread sealer???whats the torque specs on the studs??? and what is the tightening sequence and torque specs of the nuts for the studs? i have a set that i got with the heads but no instructions...

thanks guys
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Old 05-22-2009, 07:14 AM   #2
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The nut tightening sequence should be the same as using bolts. A lot of people have a terrible time sealing studs, so I suggest you search for what works best. Seems like more than half of the people that use them end up having leaks and redoing them or going back to bolts.
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Old 05-22-2009, 07:33 AM   #3
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Default Studs

Unless specs have change you do not or did not torque the studs, Actually when I did studs on my LT1 years ago the directions said to only finger tight. When you start torquing the nuts you will see the stud tighten up also. I have never had any leaks but I use aircraft grade sealer...
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Old 05-22-2009, 07:50 AM   #4
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Quote:
Originally Posted by moehorsepower View Post
I have never had any leaks but I use aircraft grade sealer...
Can you be more specific on that sealer? I'm getting ready to put my studs in as well.
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Old 05-22-2009, 08:09 AM   #5
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Finger tight like moe horsepower said, than follow oe tightening sequence,I used blue loctite the first time and they did leak a little bit, so Im using high temp liquid thread sealant this time, here's a pic, you can see the white sealant on the bottom of the studs where they attach to the block
[IMG]Click the image to open in full size.[/IMG]
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Old 05-22-2009, 03:01 PM   #6
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so who makes this aircraft sealer?
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Old 05-23-2009, 08:34 AM   #7
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i think one of the main problems people have with leaking studs is the finger tight part. that assumes your holes are perfectly chased. when i installed mine the first time i noticed that some studs didnt seat all the way. the shoulder has to seat against the block. the arp instructions list "finger tight" torque but say no more than i think 10ft-lbs. mine have never seeped or leaked coolant and i just used regular liquid teflon thread sealer.
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Old 05-24-2009, 12:26 AM   #8
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yea some threads on mine wouldn't let me finger tighten them down, so I torqued em all to 10 ft lbs. I used copper silicone for mine, a buddy had good results. My motor hasn't run yet, but the electric water pump has some run time and I don't have any leakage so far. I torqued the nuts down to 75 ft lbs using 10-30 oil as the lubricant. Also using a good stop-leak when you initially fill the radiator is a good preventative measure. I used the gm stuff, I think its like 6 vegetable based tablets.
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Old 05-24-2009, 12:29 AM   #9
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another thing, whatever sealer you use, make sure there's no residue left on the deck of the block that will cause head gasket issues. I used alcohol and brake cleaner and a good minute on each stud with a terry cloth to get rid of excess that could seep under the head gasket.
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Old 05-26-2009, 06:38 AM   #10
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Quote:
Originally Posted by robsquikz28 View Post
so who makes this aircraft sealer?

I can check out one of these packages today, But I do not believe you can purchase this as a one tube item if any at all. Like I say I work in the industry so I have access to this stuff...
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Old 05-26-2009, 12:27 PM   #11
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25 miles on my copper rtv sealed studs and no leaks
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Old 05-26-2009, 04:35 PM   #12
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i run my studs down finger tight, and back them off a half turn. always used gm teflon thread sealer. works like a charm never had a leak on anything ive studded. main deal using studs, make sure the deck is flat and the heads are flat. for some odd reason, bolts seem to mask slight imperfections better than studs.
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Old 05-26-2009, 05:44 PM   #13
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Quote:
Originally Posted by moehorsepower View Post
I can check out one of these packages today, But I do not believe you can purchase this as a one tube item if any at all. Like I say I work in the industry so I have access to this stuff...
Dude, just tell me what you use, I'll find it. I'm in the biz myself.
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Old 05-26-2009, 05:44 PM
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