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arggg! cant keep crank bolt in motor!

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Old 06-14-2009, 07:16 PM
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Default arggg! cant keep crank bolt in motor!

the 1st one i thought was my fault.
i hit it with the impact and let it ride. 230ft pd would be a decent guess from past experiences.
2nd bolt was covered in red rtv(all i had at the time)
torqued to 200ft pd with wrench, then hit with an extended breaker bar as hard as i can go.
arp bolt both times.

both have exited the motor.
what gives??
eagle crank and ati damper if it matters.
Old 06-14-2009, 07:21 PM
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Whats the torque spec on that particular bolt? I know the stocker is like 32ft-lb + 170 degrees. You may have actually overtorqued it and ruined the threads inside your crank? 230ft-lb is a hell of a lot of torque for that small bolt.
Old 06-14-2009, 07:45 PM
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ARP calls for 230# with ARP moly lube (don't know why you'd feel inclined to use RTV)? Borrow a 16mm x 2.0 tap, clean that junk out of the threads in the crank, and try it again with the correct lube.

Russ
Old 06-14-2009, 09:03 PM
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Originally Posted by Arc00TA
Whats the torque spec on that particular bolt? I know the stocker is like 32ft-lb + 170 degrees. You may have actually overtorqued it and ruined the threads inside your crank? 230ft-lb is a hell of a lot of torque for that small bolt.
its either 230 or 250. threads in crank are good. verifyed with a stock bolt.
Old 06-14-2009, 09:05 PM
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Originally Posted by S10xGN
ARP calls for 230# with ARP moly lube (don't know why you'd feel inclined to use RTV)? Borrow a 16mm x 2.0 tap, clean that junk out of the threads in the crank, and try it again with the correct lube.

Russ
looking in with a flashlight, there isnt much "junk" at all in the threads.
stock bolt spins in and out just fine by hand.
i might try a new stock bolt this time around.
dont know whats going on here.
Old 06-14-2009, 10:19 PM
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mine would spin out of the crank on my blower car until i used red loctite never had a problem after that
Old 06-14-2009, 11:53 PM
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Originally Posted by topdog515
mine would spin out of the crank on my blower car until i used red loctite never had a problem after that
X2 on the Red Locktite. I have put in probably 30 Crank bolts in the last 2 years and never had one back out!!!
Old 06-15-2009, 12:32 PM
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i think to press the pulley on is 235 pounds then back it off and go to around 38 or something am i wrong? I havent had an issue yet!!
Old 06-15-2009, 07:30 PM
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i didnt know you could use red locktite on the bolt
Old 06-15-2009, 08:07 PM
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Originally Posted by ItzQuik
i didnt know you could use red locktite on the bolt
You are not supposed to - or it is not required. That is what ARP says...But...if you read the instructions for ATI dampener they say to use red loctite....who knows!
Old 06-15-2009, 08:42 PM
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Originally Posted by vsocks1
You are not supposed to - or it is not required. That is what ARP says...But...if you read the instructions for ATI dampener they say to use red loctite....who knows!
maybe its something to do with the damper?
mmm. im going with a cheap stock bolt this time. arp bolts are getting expensive for me.
Old 06-15-2009, 08:43 PM
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Originally Posted by dub.ya.es.SICK
i think to press the pulley on is 235 pounds then back it off and go to around 38 or something am i wrong? I havent had an issue yet!!
dont EVER press a pulley on with a bolt.
thats asking for trouble.
homeade stud kit is cheap from the local bolt supplier, or buy one online and do it right.

installer beware.
Old 06-15-2009, 08:51 PM
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Clean it out good with brake cleaner, blow it out with the air hose, and put it back in with a lil red loctite on it. ARP spec is 245 ft lb.
Old 06-15-2009, 10:54 PM
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I used locktight as well...
Old 06-16-2009, 04:26 AM
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Good advice above and it's what I did back in 2004 when I installed my ATI balancer w/ an ARP crank bolt.

The threads on the bolt and the crank interior need to be very clean, Brake Parts Cleaner works well for this.

Red Loctite on the bolt threads, and ARP Moly Grease under the bolt cap. Torque to spec and you're done.
Old 06-16-2009, 10:55 AM
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I would use the Blue loctite. The red will be hard to heat with the bolt so deep in the crank if u ever need to get it out.
Old 08-19-2009, 11:11 AM
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hi are you sure that the crank is drilled and threaded deep enough?
Old 08-19-2009, 11:20 AM
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Originally Posted by BigRich954RR
I would use the Blue loctite. The red will be hard to heat with the bolt so deep in the crank if u ever need to get it out.
They have red that is removeable or permanent. I usually buy the removeable red.
Old 08-19-2009, 11:32 AM
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Use the ARP bolt to seat the pulley,(seeing that it's about 1'' longer) then back it out use a gm bolt with red locktite torque 230-250 then try to turn 90* and you're good to go
Old 08-19-2009, 03:16 PM
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he put a stock one in and its so far so good



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