Crank bolt question....
Race Director
Joined: Apr 2004
Posts: 16,135
Likes: 5
From: Newberry FL
Cruise-In VIII Veteran
St. Jude Donor '07
I would go ahead and try a new bolt. I realize it is a very nerve racking ordeal and if the threads in the crank housing are in question this would surely answer it, but I really don't think it is that. My person opnion. However, if it is, you will know that putting everything together and running the car with a bad thread pattern in your crank would be very bad and with the space in front of it, it maybe possibly for someone to come to you and clean it out and make things good.
Not that I am a professional mechanic I hope you take my advice lightly, but you could get some PB Spray (a can cost about $5, and it is used to help old bolts out and such) and spray some of it in there...Take your crank bolt and just tighten it
Not that I am a professional mechanic I hope you take my advice lightly, but you could get some PB Spray (a can cost about $5, and it is used to help old bolts out and such) and spray some of it in there...Take your crank bolt and just tighten it
Race Director
Joined: Apr 2004
Posts: 16,135
Likes: 5
From: Newberry FL
Cruise-In VIII Veteran
St. Jude Donor '07
Originally Posted by molson
Thanks for the reply..
I did get it out and the threads on the bolt look good.
I will try using some lubricant on the threads before I retry.
I did get it out and the threads on the bolt look good.
I will try using some lubricant on the threads before I retry.
Instructor
Joined: Mar 2005
Posts: 220
Likes: 0
From: Los Angeles CA
i did this a few months ago.......
at 37lbs+ 140 degrees i was right around 260lbs on my torque wrentch.... so there is something seriously wrong if you are only at 40 degree's and already at 250lbs.
at 37lbs+ 140 degrees i was right around 260lbs on my torque wrentch.... so there is something seriously wrong if you are only at 40 degree's and already at 250lbs.
Thread Starter
Pro
Joined: Feb 2004
Posts: 718
Likes: 1
From: barrie ontario
Originally Posted by CheM
i did this a few months ago.......
at 37lbs+ 140 degrees i was right around 260lbs on my torque wrentch.... so there is something seriously wrong if you are only at 40 degree's and already at 250lbs.
at 37lbs+ 140 degrees i was right around 260lbs on my torque wrentch.... so there is something seriously wrong if you are only at 40 degree's and already at 250lbs.
I agree ....maybe the bolt is bottoming out???
Intermediate
Joined: Mar 2002
Posts: 40
Likes: 0
From: Carmel IN
I used a 3/4 drive ratchet with a 4 foot extension, even with the
car in 4th gear and parking brake on, I managed to only get to 100 degrees before the rear wheels turned and just about jumped off my
jack stands! Scared the SH** out of me.
There has got to be a better way to do that. I know that was WAY more than 250 ft-lbs.
car in 4th gear and parking brake on, I managed to only get to 100 degrees before the rear wheels turned and just about jumped off my
jack stands! Scared the SH** out of me.
There has got to be a better way to do that. I know that was WAY more than 250 ft-lbs.
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Drifting
Joined: Jan 2001
Posts: 1,347
Likes: 4
From: Slidell La
I agree on check the bolt length to insure it is not bottoming out in the crank. If you bottom out it will not turn and this might be the issue. Check how far the threads go inside the crank and compare bolt length of the old to the new. Good luck. 99 Nassau Blue
Le Mans Master
Joined: Sep 2003
Posts: 8,847
Likes: 795
From: Longview Texas
My service manual says if the end of the crank is not still recessed 0.094-0.176 inches below the bolt surface of the pulley after torquing to 240 ft-lb, you are to remove the pulley and start over.
Was the pulley already flush with the end of the crank before the new bolt was installed and torqued to 37 ft-lbs?
It seems like if there is still clearance at the end of the crank, then part of the final 140 deg. rotation would be pushing the pulley the rest of the way on the crank...
Was the pulley already flush with the end of the crank before the new bolt was installed and torqued to 37 ft-lbs?
It seems like if there is still clearance at the end of the crank, then part of the final 140 deg. rotation would be pushing the pulley the rest of the way on the crank...
Last edited by TEXHAWK0; Apr 13, 2006 at 06:49 PM.
