Ilya wrote: ↑Thu Oct 25, 2018 7:38 pm
Eh...torque specs are over-rated for your daily driver/DIY jobs like oil filters, wheels, etc. Some may disagree but I think that unless it's like a race car with super duper specific clearances or something, it's as tight as I can get it with my hands and then another quarter turn or so. Been working on cars for 15 years and my dad like 60 and we've adjusted our torque wrench like once lol.
Well, I am one to disagree! Especially with today's daily drivers!
The most commonly abused torque spec are wheels. Wheel torque spec is critical. Most wheels are over torqued, resulting in warped rotors, or even worse, broken studs on wheel removal.
Early on, our "M"s were maligned with having inferior OEM rotors that warped just by looking at them. Truth is, they are fine.
Many folks upgraded wheels & tires early on, and lots of over torquing in the process took place. These owners noted rotor warpage and pinned it on poor rotor design! It went viral on forums!
Sadly, even today some tire install shops fail to use a torque wrench on wheel installations.
I have seen this too many times. Over torqued studs can make emergency roadside tire changes (flat tires) very difficult, often resulting in snapped lugs.
You cannot properly work on today's engines and transmissions without adhering to torques.
Alloys, cast iron, aluminum blocks, heads, transmission valve body's etc. etc. all have torque specs that are essential to follow to reduce premature failures. Expansion rates vary for metals and the the bolts used to clamp them. Torque specs are factored into this during engineering.
Just as critical is torque sequence! we can save that topic for next!