E70 tensioner bolt hole broken(pics added)

[WaterMonkey]

Good day to everyone.

I recently purchased a 09 X5 xDrive 3.0

Was told the belt had slipped and the tensioner had bent. And someone tried to fix it and stripped the bolt. Hearing this, I purchased it anyhow.

Upon further checking by removing parts I found that the belt tensioner bolt hole is broken.

So I need all the ideas in the world. Any bypass, workarounds ideas anything.

List of things I have checked.(please double check)

1.) Internet search, everything I found is belt tensioner bolt holes broken but usually are part of alternator or engine timing cover. Neither of which apply to the n52k(n52b30), not as far as I'm aware.

2.) Exploded diagrams of engine block. I was hoping I could remove the cylinder head and remove the "disk" that has the hole from the engine block and install a new one. I don't own any paid website diagrams so maybe it's one of those parts.

3.) Stretch belt , but none of them I found are long enough (around 48inchs) .

Here are some pics.

[WaterMonkey]

Some reason the pics are not showing. Maybe a moderator thing?

[B4_685]

Without seeing any photos sounds like a pain in the butt - maybe someone with aluminium tig-welding skills might suggest a repair


2012 E70 50i

[WaterMonkey]

Originally Posted by B4_685

Without seeing any photos sounds like a pain in the butt - maybe someone with aluminium tig-welding skills might suggest a repair


2012 E70 50i

Thank you for your response, yes I'm afraid that's the case. Hence I come here praying.
Question for you is there a reason I can't post pics?? I used imgur links with [img]

Again thank you for your response it means alot

[ard]

Originally Posted by WaterMonkey

Hearing this, I purchased it anyhow.

.

Good god, why?


If you are a BMW master mechanic, you can probably deal with this in a weekend. But since you are here, asking, I assume not....


But why would you buy a car with such an issue? I mean when a seller says 'yeah it broke, you just need to ___________" anyone knows they are lying. It amazes me how often people fall for this. I guess a never ending supply of victims.


Hope you find someone that has direct experience.


oh, you dont need any paid websites.


www.realoem.com/bmw
www.newtis.info
www.getbmwparts.com
www.bmwofsouthatlanta.com


GL

[B4_685]

Originally Posted by WaterMonkey

Question for you is there a reason I can't post pics?? I used imgur links with [img]

I normally post from my phone using the link above my keyboard on my iPhone.




2012 E70 50i

[ard]

I think imgur may not always play nice....

[robinasu]

Is that a heli-coil already in there? Man.. I guess adding material and then tapping is an option, but seems pretty damn hard considering the location and accuracy needed to line up the hole with the parts to be fastened. Keep in mind I am not looking at the thing in person, but if it was mine, I would try removing any loose bits, the existing heli-coil (if there), and cleaning it out real good with alcohol and a brass brush and see if a heli-coil can bite enough at the end of the hole. If you can torque it down to close to spec without it spinning, I would then remove, clean again with alcohol real good, rough up the surrounding area, create a form to recreate the broken block portion, then use JB weld "steel" high temp epoxy on the installed bolt, helix-coil, and block to set it in place with the tensioner installed (but no belt until the epoxy is totally set). I don't know- as I type this it seems sketch. Hopefully others have some way better ideas. Maybe just the heli-coil could be epoxied into the hole before the tensioner is installed. I don't know..

[robinasu]

Originally Posted by ard

Good god, why?


If you are a BMW master mechanic, you can probably deal with this in a weekend. But since you are here, asking, I assume not....


But why would you buy a car with such an issue? I mean when a seller says 'yeah it broke, you just need to ___________" anyone knows they are lying. It amazes me how often people fall for this. I guess a never ending supply of victims.


Hope you find someone that has direct experience.


oh, you dont need any paid websites.


www.realoem.com/bmw
www.newtis.info
www.getbmwparts.com
www.bmwofsouthatlanta.com


GL

It would be awesome if your day job was marriage counseling. Tough love, by ARD.

[Badsmerf]

Originally Posted by robinasu

Is that a heli-coil already in there? Man.. I guess adding material and then tapping is an option, but seems pretty damn hard considering the location and accuracy needed to line up the hole with the parts to be fastened. Keep in mind I am not looking at the thing in person, but if it was mine, I would try removing any loose bits, the existing heli-coil (if there), and cleaning it out real good with alcohol and a brass brush and see if a heli-coil can bite enough at the end of the hole. If you can torque it down to close to spec without it spinning, I would then remove, clean again with alcohol real good, rough up the surrounding area, create a form to recreate the broken block portion, then use JB weld "steel" high temp epoxy on the installed bolt, helix-coil, and block to set it in place with the tensioner installed (but no belt until the epoxy is totally set). I don't know- as I type this it seems sketch. Hopefully others have some way better ideas. Maybe just the heli-coil could be epoxied into the hole before the tensioner is installed. I don't know..

Exactly what I would do if I was in that position. My bolt broke clean off one morning and I had to use a drill and easy out. Luckily, I didn't damage any threads. On the plus side, you SHOULD be able to notice right away if the bolt fails in the future.

Maybe you can re-tap it and you a bigger bolt? If the assembly will still fit, and you have enough room.