echoffmann 2 #1 Posted April 22, 2014 Anyone know the torque setting for #1 in this photo? Taking it off to replace bad sending unit with a mechanical gauge, have new gasket but don't want to over tighten it OR leak. :-) Share this post Link to post Share on other sites
Ed Kennell 35,617 #2 Posted April 22, 2014 You probably mean item #3 bolt. for any hex head bolt torque determine the size by measuring the shank ,thread by counting the number of threads per inch or mm per thread if metric , and grade by markings on head of bolt.. grade #2 has no marks, grade #5 has 3 radial lines, grade #8 has 6 radial lines. Recommended torque is 65% of yield strength. With this info, goggle bolt torque and find your bolt torque. Share this post Link to post Share on other sites
echoffmann 2 #3 Posted April 22, 2014 You probably mean item #3 bolt. for any hex head bolt torque determine the size by measuring the shank ,thread by counting the number of threads per inch or mm per thread if metric , and grade by markings on head of bolt.. grade #2 has no marks, grade #5 has 3 radial lines, grade #8 has 6 radial lines. Recommended torque is 65% of yield strength. With this info, goggle bolt torque and find your bolt torque. Thanks! And yes, the bolt is what I meant....good luck torquing a plate of aluminum. Great tip for all projects, when I get the bolt out I'll do some measurements and fire up the Google machine. Share this post Link to post Share on other sites
JackC 616 #4 Posted April 22, 2014 Need to be very very careful when torquing bolts into aluminum. It is not cast iron like we are used to working with. Don't ask me how I know. Share this post Link to post Share on other sites
shorts 182 #5 Posted April 22, 2014 Like ekennel said google up a bolt torque chart or checkwith a fastener specialist like Grainger's or Fastenal, or look at the index in the online engine manuals, when you find a good comprehensive chart that gives some input as to what material the fastener is being in/on and the differences for dry or lubricated threads print it out have it laminated and save it in your tool box for future reference, it is a very valuable tool to keep handy. Share this post Link to post Share on other sites
Martin 2,130 #6 Posted April 22, 2014 (edited) Onan manual says 8-10 ft lbs..... (Other 5/16 studs and nuts into cylinder block) Sent from my iPhone using Tapatalk Edited April 22, 2014 by Martin Share this post Link to post Share on other sites
echoffmann 2 #7 Posted April 22, 2014 Onan manual says 8-10 ft lbs..... (Other 5/16 studs and nuts into cylinder block) Sent from my iPhone using Tapatalk Perfect, thanks Martin. Knowing that, I'll see if I can come up with a close number using ekennell direction...just to see. Share this post Link to post Share on other sites
