Torque specification for 1979 leaf spring bolt
Thread Starter
Instructor
Joined: Mar 2017
Posts: 221
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From: Ijamsville Maryland
Torque specification for 1979 leaf spring bolt
Thanks in advance. I have just sourced the spring liner for my 1979 2.5" leaf spring swap into my '75 and am getting ready to do a final clean and prep/paint on the leaves prior to reassembly. I am hoping someone may have the torque spec for the bolt/nut that brings the leaves together. I have the 1975 AIM but do not have the 1979 AIM and am thinking the wider spring in the '79 may have a different torque spec. If anyone may be able to provide me with that information, it would be appreciated!
BTW-I have been reading may more than I thought I would need to regarding leaf springs. I am going to try and avoid putting any more coating than needed (maybe none) on the leaf surface that interfaces with the next leaf liner as Eaton Spring indicates that even the buildup of a few thousandths of an inch of primer/paint/powder coating, etc. can be detrimental to the spring performance over time as the coating wears off and prematurely "loosens" the assembly as a whole.
BTW-I have been reading may more than I thought I would need to regarding leaf springs. I am going to try and avoid putting any more coating than needed (maybe none) on the leaf surface that interfaces with the next leaf liner as Eaton Spring indicates that even the buildup of a few thousandths of an inch of primer/paint/powder coating, etc. can be detrimental to the spring performance over time as the coating wears off and prematurely "loosens" the assembly as a whole.
Team Owner
Joined: Sep 2006
Posts: 31,221
Likes: 4,312
From: Westminster Maryland
Hi H,
Because the spring came to the line as an 'assembly' (that bolt already in place) the torque specification won't appear in the AIM.
I really think the nut only needs to be tightened enough for the bolt to hold the leafs in alignment while the spring is installed… 20-30 ft. lbs ?.
It's the 4 large bolts on the retainer plate that do the work. Those use 70 ft. lb. on a 71 9 leaf.
Regards,
Alan
Because the spring came to the line as an 'assembly' (that bolt already in place) the torque specification won't appear in the AIM.
I really think the nut only needs to be tightened enough for the bolt to hold the leafs in alignment while the spring is installed… 20-30 ft. lbs ?.
It's the 4 large bolts on the retainer plate that do the work. Those use 70 ft. lb. on a 71 9 leaf.
Regards,
Alan
Last edited by Alan 71; May 1, 2017 at 09:01 AM.
