Reinforcement Plate Bolts Question

[R1pilot]

I believe that last time I removed the reinforcement plate to do the rod bearings I had to change the bolts as they were one time use only. Is this correct?

I have a slight leak that I cant figure out where its coming from and will probably need to remove it. Want to make sure I dont snap any of them if I reuse them as I think the torque spec on them was pretty high.

Thanks!

[heinzboehmer]

You won't snap them if you reuse them and they were torqued correctly previously (and a lot of people do). However, BMW does specify to replace them after every use.

[BMWE46M3]

If you replace them I'd suggest getting them at FCP since they have a lifetime warranty, and you'll never have to buy them again the next time you need to remove the reinforcement plate.

[PSUEng]

I recently re-used mine. Torqued to spec, sans the angle. So far so good. I do have a fresh set for use after I do some exhaust and front end work, as I won't (shouldn't) be back in there again for a while.

[R1pilot]

You won't snap them if you reuse them and they were torqued correctly previously (and a lot of people do). However, BMW does specify to replace them after every use.

Yep, properly torqued with SnapOn torque wrench that has angle as well.

I knew there was a reason I replaced them, I guess I read them in the BMW instructions I had for the bearings. '

Will try and reuse them. The FCP euro is a great idea!, as a matter of fact I need to check as I might have bought them there.

[R1pilot]

I recently re-used mine. Torqued to spec, sans the angle. So far so good. I do have a fresh set for use after I do some exhaust and front end work, as I won't (shouldn't) be back in there again for a while.

I mean, if you did not do the angle part you are extremely undertorqued ... might as well tighten them without a torque wrench, no?

[PSUEng]

I mean, if you did not do the angle part you are extremely undertorqued ... might as well tighten them without a torque wrench, no?

Given the application, I’m comfortable with how I’ve installed it.

[Icecream]

Yep, properly torqued with SnapOn torque wrench that has angle as well.

I knew there was a reason I replaced them, I guess I read them in the BMW instructions I had for the bearings. '

Will try and reuse them. The FCP euro is a great idea!, as a matter of fact I need to check as I might have bought them there.

I snapped one before, also reused them before. Since it is a reinforcement plate, I would do the proper torque angle on it, it is considerable amount of additional torque and with how anal we all are with rigidity/handling and such, I wouldn't skimp on a reinforcement plate. Ymmv.

[oceansize]

I rotate in 2 or 3 new ones each time.

[R1pilot]

I rotate in 2 or 3 new ones each time.

Probably a good idea. I just checked and they are $40 from FCP Euro. Last time I removed them was about two years ago, I will just wait another week to check the car and order them.

I wonder if they are stretch to yield bolts.

[R1pilot]

Given the application, I’m comfortable with how I’ve installed it.

You go to Penn State for Engineering?

[bmwfnatic]

I just run these in with the impact, never broke one or had any issues. Some of you are seriously overthinking this.

I think only once I did the proper procedure with a SO digital torquewrench, it came out to a final torque of around 100 Nm (might be wrong it's been a few years).

Which to me seems way too low to reach the yield point of a bolt sized like these, so I would deem them totally fine to re-use.