Does anybody have the torque specifications for these bolts? I am getting ready to assemble me engine again, and put the engine back in. 12 bolts that hold the Sub frame to the frame? Bolts that hold oil sump pan? Valve cover bolts?
Lars, I don't recall which model you own, but I have several lists of F car torques. Basically, for a given size of stud, threaded into aluminum, the torques should be pretty standard 6mm x 1mm thread pitch 0.9kg-m (6.5ftlbs) This should work for cam covers, and (I think) sump pan 8mm x 1.25mm thread pitch 2.0-2.5 (18-23) Depends on specific part.... I'd split the difference..2.3 As far as the subframe bolts, I don't see a spec, but I'll be facing the same decision. Mine are large 14mm bolts providing a clamping force. I'd get them about as tight as I could. My torque wrench only goes up to 150ft-lbs, and I don't think 150ftlbs is unreasonable for this clamping force. I'd start at 120ftlbs, and just make sure that the frame members are not deflecting very much... you can check with a dial calipers. Then I'd go up a bit from there if everything looks Ok. Edit: Just realized there are sleeves through the frame members.... with this, frame deformation shouldn't be an issue. I'd go at least 150ftlbs; hopefully higher. Wouldn't surprise me if some just use an impact wrench to tighten them. Best of luck! Edit
Lars, I checked, and on my 348, the sump pan studs are actually 8mm, so use that torque. I'd say mine were even tighter than that when I removed the nuts. As far as tightening torque sources, Verell posted a couple links several years ago for Ferrari manuals for the 308GT4 and 328. Here are the links, and just look in the index to find the torque lists. I agree with Verell that the newer lists are probably the most up-to-date. http://ferrari.jenkins.org/books/308GT4_workshop.pdf http://ferrari.jenkins.org/books/328_tech.pdf Rick
