what is the correct torque for the eight Ribe bolts attaching the F355 flywheel?
Those aren't the highest tensile bolts. I now use better ones and would torque those to 60 Nm. And more importantly use Loctite. So just take a little care with old ones.
I looked up the maximum torque for an M8 bolt with 10.9 tensile strength and it is 36 Nm. So I used that.
Torque is a function of desired clamp load based on design intent. It really needs to come from the manufacture. Charts vary greatly and have no consideration for clamp load per design intent.
Is that the same as saying "tight enough, all the same tightness"? (Sorry, I can't resist my redneck heritage sometimes )
Reading the work shop manual for torques is often a guessing game. I believe the very first line is what you are looking for (2.5 daNM or 25NM). As a point of reference, the 360 states 18NM but has 15 fasteners. Again, this is all up to interpretation as it's certainly not clear.
25 Nm is for all M8 fasteners of the case. Nothing is specified for the Flywheel because they WANT you to buy the whole flywheel - dampener unit at $4500. And we are not doing that. Again, you are right "it's certainly not clear" and that is why we go the other route.
I'm not sure the torque is not specified for that reason as it is for the 360. Remember, the workshop manuals where created for techs not end users so commercial motivation was not a factor.
On any motor, brake part, rotor or flywheel I always measure break away torque and take note. When you open things up it can be a valuable reading.
That is zero excuse not to have a specific torque. Fact is None of the exotic car company's made workshop manuals worth a **** for older cars. Techs usually are not wizards that know a specific torque for each fastener of the top of their head. The Book should spell it out in black and white if its not there I guess they were not worried about torquing it. Nothing should be up for interpretation because then you have many different people "interpreting" it wrong. Because my interpretation without a specific torque on a specific fastener on a specific part means German torque "good and tight" haha
Those are for the pressure plate, not the flywheel. The entire clutch/flywheel design for the 360 is vastly different from the 355.
No, they just want you to have another set of tools. I did not have a set, so pressed for time, I took a slightly larger Torx bit (T50) and ground the ends off flat to fit Ribe bolts. Works well enough until the real bits show up.
