Aluminum Skid Plate

[ry0de]

Does anybody know the torque spec for the bolts that hold the aluminum skid plate?

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[FuzzyRev]

BMW doesn't want you to re-use them, as the spec is 41 ft-lbs, and after torquing them all, go back and tighten another 45 degrees of rotation.

 

[zrk]

i take mine off all the time for various shit. several cars do because ¯\_(ツ)_/¯. They get 3 ugga's on the impact.

 

[FuzzyRev]

i take mine off all the time for various shit. several cars do because ¯\_(ツ)_/¯. They get 3 ugga's on the impact.

 

[tomfree]

Yeah...using torque to yield fasteners on a friggin' undertray panel and various plastic bits underneath the car is hilarious. Someone at the vendor who sells the TTY fasteners to BMW made a few extra bucks on that deal.

I'm like ZRK - I've taken them off and reinstalled them several times. I use a battery right angle ratchet to tighten, and then snug it down by hand a little after the ratchet stops.

Now...the rear subframe bolts, those are TTY fasteners you shouldn't reuse.

 

[FuzzyRev]

Yeah...using torque to yield fasteners on a friggin' undertray panel and various plastic bits underneath the car is hilarious.

I'm referring to JUST the center aluminum plate, which they consider part of the suspension sub-group, calling it a "front suspension member lower protector," being bolted to a stressed member, and the centermost bolt is actually a jack point.

I didn't design it, I just work here. Dude asked for the torque spec, I gave it to him.

 

[tomfree]

Not trying to start a fight here, nor did I intend to attack you, or you providing the requested data to the OP. More of a statement of the perceived (by some of us, myself included) overuse of TTY fasteners on this car.

My intended message - I would not be afraid to use that bolt multiple times, and I would not follow the TTY procedures for it because the undertray panel itself is not structural or stressed. My battery right angle ratchet maxes out at about 35#, so my guestimate of tq that I put on that bolt is probably around 40# with no additional 45deg to stretch the bolt.

I'm aware that it is the front jacking point, as I just used it 2 days ago.

 

[chuckyl]

Skid Plate
If you live in the DFW area, I have one never installed. I'll sell at a very reasonable price. PM me

 

[FuzzyRev]

Not trying to start a fight here, nor did I intend to attack you, or you providing the requested data to the OP. More of a statement of the perceived (by some of us, myself included) overuse of TTY fasteners on this car.

LOL I knew you weren't trying to start anything, nor did I take any of that as a personal attack. I certainly agree with the excess of "non-reusable" fasteners on this platform, but I also understand the science and legal reasons why they do and say such things.

 

[zrk]

I'm not kidding though.

 

[FuzzyRev]

I'm not kidding though.

Where's my cargo net and rug you FIB?!

 

[ry0de]

Just to clarify. I can just reuse the bolts for the aluminum skid plate? I’d just have to torque to 41 ft-lbs and tighten another 45 degrees? I only took out the 12 bolts holding the skid plate.

 

[FuzzyRev]

Just to clarify. I can just reuse the bolts for the aluminum skid plate? I’d just have to torque to 41 ft-lbs and tighten another 45 degrees? I only took out the 12 bolts holding the skid plate.

YES

 

[zrk]

Where's my cargo net and rug you FIB?!

You said you were coming to get it.

 

[FuzzyRev]

You said you were coming to get it.

Was going let you take some material off my clutch as as well..

Don't worry, I still am, in about two weeks.

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