suspension bolt Tq help .. please!!

[Beedub]

ok so id like a little help please i need the tq figures for the main components of the z4m suspension.. This could be helpful to other members also as a quick reference guide to the main parts we will be working with...

ok so the top 3 nuts on the strut tops are 34nm if you have a strut brace.

what are the Tq figures for the

strut pivot mount?
The bottom 2 nuts to hub carrier?
End links connecting strut to ARB?

On the rear

im using Re shock mounts so the tighten to 28nm

Whats the rear shock bottom nut Tq figure??

I did have a look at the bmw TIS for these specs But unfortunatly im struggling to decipher their wording for some items and also some parts arent listed....

anybody that can answer these questions earns me buying you a beer when i arrive state side real soon :-)

cheers guys!!

[seank]

Tight, semi tight and tight. There are also some websites that tell you the torque based on bolt and nut sizes. You could google those.

[Beedub]

Originally Posted by seank

Tight, semi tight and tight. There are also some websites that tell you the torque based on bolt and nut sizes. You could google those.

i did google.... i always google before asking questions, but in this case couldnt find the answers i seek hence my thread.

tight, semi tight, and tight......
most helpful post of the year goes too..............
thanks anyway ;-)

anyone else chime in here

[mfanatic325]

TAS works for me. Tight As Shit

[The HACK]

If you have the TIS it's pretty easy to figure out. The instruction calls for tightening torque with a number that typically follows this format:

XX XX XAZ

When you click on it you will be taken to the document for the XX XX part of the specifications, the XAZ is the section on the page that lists the actual torque spec. So for example, the 3 nuts that hold the strut bearing to the strut calls for:

31 31 1AZ

Referencing the chassis code E86 reveals the tightening torque is 34Nm, or the equivalent of 25 ft-lbs (please note, if you have aftermarket suspension and camber plates, make sure you FOLLOW THE MANUFACTURER'S RECOMMENDATIONS).

You may want to try and look it up yourself, again, if you have the TIS. Also note, most BMW fasteners are designed to break if too much torque is applied, I've broken TWO strut mount studs and one hub clamp bolt before I got smart and bought a torque wrench. Especially the strut mount studs, they'll break off if you exceed the 34Nm/25ft-lbs by too much, which is really barely hand tight.

So for all the fasteners you listed here:

31 31 1AZ Strut pivot mount (3 nuts to strut tower): 34 Nm
31 31 2AZ Strut to pivot mount (1 large nut): 64 Nm*
31 21 4AZ The bottom 2 nuts to hub carrier: 81 Nm**
31 35 5AZ End links connecting strut: 58Nm

33 52 1AZ Rear shock bottom nut: 100Nm

* I thew this in because I'm not sure if you're talking about the nut that secures the strut bearing to the strut tower, or the nut that secures the strut to the strut bearing

** TIS calls for replacing the nut. If you don't want to, I'd at least apply a dab of red loctite to it.

[seank]

I think you owe the hack a couple of beers for that kind of answer. Hell, we don't need the forum, we will just send him our questiions.

[crfine88]

Originally Posted by The HACK

If you have the TIS it's pretty easy to figure out. The instruction calls for tightening torque with a number that typically follows this format:

XX XX XAZ

When you click on it you will be taken to the document for the XX XX part of the specifications, the XAZ is the section on the page that lists the actual torque spec. So for example, the 3 nuts that hold the strut bearing to the strut calls for:

31 31 1AZ

Referencing the chassis code E86 reveals the tightening torque is 34Nm, or the equivalent of 25 ft-lbs (please note, if you have aftermarket suspension and camber plates, make sure you FOLLOW THE MANUFACTURER'S RECOMMENDATIONS).

You may want to try and look it up yourself, again, if you have the TIS. Also note, most BMW fasteners are designed to break if too much torque is applied, I've broken TWO strut mount studs and one hub clamp bolt before I got smart and bought a torque wrench. Especially the strut mount studs, they'll break off if you exceed the 34Nm/25ft-lbs by too much, which is really barely hand tight.

So for all the fasteners you listed here:

31 31 1AZ Strut pivot mount (3 nuts to strut tower): 34 Nm
31 31 2AZ Strut to pivot mount (1 large nut): 64 Nm*
31 21 4AZ The bottom 2 nuts to hub carrier: 81 Nm**
31 35 5AZ End links connecting strut: 58Nm

33 52 1AZ Rear shock bottom nut: 100Nm

* I thew this in because I'm not sure if you're talking about the nut that secures the strut bearing to the strut tower, or the nut that secures the strut to the strut bearing

** TIS calls for replacing the nut. If you don't want to, I'd at least apply a dab of red loctite to it.

Way to hook a brother up!

Great detailed info as per usual

[Beedub]

thanks guys all sorted!!