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  #51  
Old 03-02-2021, 01:53 AM
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Originally Posted by cn90 View Post
Actually what I referred to is that: once you have a problem with let's say fan clutch or thermostat, you are > 100K miles, chances you a lot of stuff are waiting to fail: reservoir, thermostat, WP etc. etc. etc.



This is why in BMW forums, when people discuss M52, M54 engines, they always recommend a partial cooling overhaul at 100K or so.

And the complete cooling overhaul at 180K-200K.



PS: For small bolts such as the 10-mm bolts you broke: here is my tip. I use a tiny bit of Red Loctite, then tighten using only 1 finger or the pinky.


10mm bolt advised torque is 37 ft·lb (class 8.8 to roughly match the BMW torque spec of the 6mm bolt you're calling 10mm (head size).

Advised torque of the 6mm class 8.8 is 82 in·lb.

The bolts are unknown class but moot point if they are threaded into aluminum
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  #52  
Old 03-02-2021, 12:33 PM
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Originally Posted by Happy View Post
It did tear my bushing though.

You said arm not ball joint. I suppose ends of life tension strut bushings might not put up with the forces but they go through similar forces every time you hit the brakes. If you are talking about the front bushings, if they got torn from lifting on the tension strut they were already torn you just didn't see it. Maybe that's actually a good way to test them.
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Old 03-02-2021, 03:45 PM
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Originally Posted by andrewwynn View Post
You said arm not ball joint. I suppose ends of life tension strut bushings might not put up with the forces but they go through similar forces every time you hit the brakes. If you are talking about the front bushings, if they got torn from lifting on the tension strut they were already torn you just didn't see it. Maybe that's actually a good way to test them.

It was the way the jack tweaked the arm. It twisted the large bushing on the arm a bit, and tore what was probably already torn, and made it bit worse.

That is exactly how you test them, by stressing them.
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