balancer bolt will not stay tight
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
I've seen this happen when re-using the crank pulley. It seems that the looser fit the pulley has upon reinstall (it's a non-keyed light press fit) could allow it to more easily push against the bolt flange causing the bolt to loosen up. The ARP bolt is a good solution also.
Drifting
Joined: May 2003
Posts: 1,715
Likes: 1
From: cAshburn VA
I used a stock crank bolt, did everything to spec, but with a new asp ud pulley, did not pin the crank either. No problems after 4k miles, and around 30 runs at the strip. I have changed the oil twice and check it each time I change the oil.
Good Luck!
Good Luck!
Melting Slicks
Joined: Jan 2001
Posts: 2,635
Likes: 2
From: Aloha, Oregon
pin the crank and be done with it. Magnuson sells a slick kit that comes with everything you need to do it except the drill itself, for about $90. I pin every pulley when I do anything that involves taking the stock pulley off.
Robert
www.gen3motorsports.com
Robert
www.gen3motorsports.com
Melting Slicks
Joined: Oct 2002
Posts: 2,200
Likes: 0
Originally Posted by rwj383
pin the crank and be done with it. Magnuson sells a slick kit that comes with everything you need to do it except the drill itself, for about $90. I pin every pulley when I do anything that involves taking the stock pulley off.
Robert
www.gen3motorsports.com
Robert
www.gen3motorsports.com
My buddies and I have made part our stand cam install procedure....
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
Originally Posted by 99pewterc5
has any one had this problem? it was fine before cam swap. now I can not keep it tight. I replaced the bolt and went with the torqe specs .
And for this reason there really is no reason to fight to torque the bolt beyond 150 ft lbs.
For added insurance I would use an ARP bolt (they don't strech) and some high strength loctite.
Just a little info passed on to me from a fastener engineer friend.
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Le Mans Master
Joined: Jan 2001
Posts: 5,786
Likes: 6
From: Lafayette Colorado
Originally Posted by Jackal
I agree with corvettebob1, there is no reason to go to 250 ft lb if you pin the grank. Just use some high strength high temp locktite and it will be just fine.
With my crank being keyed for the ASP Harmonic Balancer from the F-1R kit, I torque the ARP crank bolt to about 150#.Keith
Advanced
Joined: Jul 2004
Posts: 78
Likes: 0
From: San Antonio Texas
same thing happed to me after heads &cam install. i bought a new balancer and bolt. so far no problems!!! im suprised nobody mentioned that you HAVE to use lock tight when installing the new bolt.
Advanced
Joined: Jul 2004
Posts: 78
Likes: 0
From: San Antonio Texas
Drifting
Joined: May 2003
Posts: 1,715
Likes: 1
From: cAshburn VA
Originally Posted by 530hp_zo6
same thing happed to me after heads &cam install. i bought a new balancer and bolt. so far no problems!!! im suprised nobody mentioned that you HAVE to use lock tight when installing the new bolt.
Remembering how hard it was to get the stock bolt off without lock-tite on it, you should pray you never have to take that one off.
