Torque for engine case studs
#1
Torque for engine case studs
I noticed a bit of weeping engine oil collecting at the lowest point of the case. It appeared to be coming from the nuts on the case studs on the forward most stud.
I checked the torque spec in the manual and it was listed at 12-15 ft/lbs. Since these studs go through the cases with a nut on either side, what harm will it do to bump the torque up to try to stop the weeping?
I checked the torque spec in the manual and it was listed at 12-15 ft/lbs. Since these studs go through the cases with a nut on either side, what harm will it do to bump the torque up to try to stop the weeping?
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Hi Johhny, The mounting foot looks good on both halves but I will check again! I did not see your most recent post before posting the following.
Bear with me as I explain what's bugging me.......
Here is a pic from the HD manual of torque specs , look at crankcase stud nut torque spec.12-15 ft/lbs. These are the nuts on the studs (rods) that pass through the cases and the torque value shows 12-15. Figure 3-34 ( 2.3.4. and 5.) shows them clearly. None of these use a tapped hole into the case alloy yet they are listed as having a torque value as if they were. (as Johhny said less than 17).
Now look at the Figure 3-34 again, crankcase stud BOLT, shown as 1. and has a torque spec listed as 22-26 ft/lbs. These bolts ARE threaded into a tapped hole the case alloy yet have a torque spec of 22-26, far exceeding the absolute max torque of 17 for alloy.
I am making the case that these torque specs are actually switched in the HD manual. Agree...Disagree?
Bear with me as I explain what's bugging me.......
Here is a pic from the HD manual of torque specs , look at crankcase stud nut torque spec.12-15 ft/lbs. These are the nuts on the studs (rods) that pass through the cases and the torque value shows 12-15. Figure 3-34 ( 2.3.4. and 5.) shows them clearly. None of these use a tapped hole into the case alloy yet they are listed as having a torque value as if they were. (as Johhny said less than 17).
Now look at the Figure 3-34 again, crankcase stud BOLT, shown as 1. and has a torque spec listed as 22-26 ft/lbs. These bolts ARE threaded into a tapped hole the case alloy yet have a torque spec of 22-26, far exceeding the absolute max torque of 17 for alloy.
I am making the case that these torque specs are actually switched in the HD manual. Agree...Disagree?
Last edited by Redrodyankneck; 09-15-2020 at 05:31 PM.
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#8
different engines shovels had - some use a 3/8 X 16 bolt left side top of the block - some use 2 -- 5/16 X 18 bolts same place as the 3/8 and in the rear left side under the mounting bolts
not everything read is for a home owner to understand - its a work SHOP manual for shop workers - we see all the changes and different things you know nothing about
not everything read is for a home owner to understand - its a work SHOP manual for shop workers - we see all the changes and different things you know nothing about
#9
different engines shovels had - some use a 3/8 X 16 bolt left side top of the block - some use 2 -- 5/16 X 18 bolts same place as the 3/8 and in the rear left side under the mounting bolts
not everything read is for a home owner to understand - its a work SHOP manual for shop workers - we see all the changes and different things you know nothing about
not everything read is for a home owner to understand - its a work SHOP manual for shop workers - we see all the changes and different things you know nothing about
I'll never be a shop guy as my exposure to shovelheads is limited to the one I own
I appreciate your candor.
#10
Hi Johhny, The mounting foot looks good on both halves but I will check again! I did not see your most recent post before posting the following.
Bear with me as I explain what's bugging me.......
Here is a pic from the HD manual of torque specs , look at crankcase stud nut torque spec.12-15 ft/lbs. These are the nuts on the studs (rods) that pass through the cases and the torque value shows 12-15. Figure 3-34 ( 2.3.4. and 5.) shows them clearly. None of these use a tapped hole into the case alloy yet they are listed as having a torque value as if they were. (as Johhny said less than 17).
Now look at the Figure 3-34 again, crankcase stud BOLT, shown as 1. and has a torque spec listed as 22-26 ft/lbs. These bolts ARE threaded into a tapped hole the case alloy yet have a torque spec of 22-26, far exceeding the absolute max torque of 17 for alloy.
I am making the case that these torque specs are actually switched in the HD manual. Agree...Disagree?
Bear with me as I explain what's bugging me.......
Here is a pic from the HD manual of torque specs , look at crankcase stud nut torque spec.12-15 ft/lbs. These are the nuts on the studs (rods) that pass through the cases and the torque value shows 12-15. Figure 3-34 ( 2.3.4. and 5.) shows them clearly. None of these use a tapped hole into the case alloy yet they are listed as having a torque value as if they were. (as Johhny said less than 17).
Now look at the Figure 3-34 again, crankcase stud BOLT, shown as 1. and has a torque spec listed as 22-26 ft/lbs. These bolts ARE threaded into a tapped hole the case alloy yet have a torque spec of 22-26, far exceeding the absolute max torque of 17 for alloy.
I am making the case that these torque specs are actually switched in the HD manual. Agree...Disagree?
Do Not confuse your own self...