Reusability of Tension Strut Bolt

James20 · 12-14-2020, 04:20 PM

FCPeuro says one should use a new bolt when replacing the tension strut (or bushing) because of corrosion.

Has anyone seen corrosion on their bolts when doing the strut?

Welcome to NBA Jam · 12-14-2020, 06:49 PM

It generally should be replaced because it's a TTY bolt with a one-time use locknut, but yes it can also corrode slowly over time. It has a corrosion-resistant coating that doesn't last forever.

MightyMouseTech · 12-14-2020, 07:36 PM

Torque to yield. Must be replaced.

liono208 · 12-30-2020, 11:42 AM

does anyone have the part number to this bolt and nut and also the nut under the ball joint?

whyzee125 · 01-02-2021, 12:21 PM

Dont reuse them. I loosened mine to install new struts and when I started to re torque, before it was tight it stripped and would not go in or out. Took about 3 hours with the air cut off wheel. Replace them.

feuer · 01-03-2021, 05:13 PM

Re use. I have. Numerous times. Probably put my 2008 E90 under lot more stress than ordinary E90. Been tracking it since 2010. Zero issues with re use.
Additionally many of these and also other make and models use TTY that are being re used every day. Very common to do so. Unlike the failures from reuse.
If is so vital when they sell you the replacement part it sill come with replacement bolt as well.

Brian86 · 01-03-2021, 09:45 PM

Not every angle torque spec is also TTY.

That's a grade 10.9 M12x1.5x85mm. 100NM+90deg does not yield that fastener.

FCP euro and Bentley say to replace them... I just reuse them. And I install them Guten'tight. I'm a bad BMW owner :P

If it's rusty and corroded of course replace it (with something from the local hardware store) Sometimes a bolt is just a bolt.

12-14-2020, 04:20 PM	#1
James20 New Member 2 Rep 10 Posts Drives: 2006 330i Join Date: Nov 2020 Location: West of I-270 iTrader: (0)	Reusability of Tension Strut Bolt FCPeuro says one should use a new bolt when replacing the tension strut (or bushing) because of corrosion. Has anyone seen corrosion on their bolts when doing the strut?
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12-14-2020, 06:49 PM	#2
Welcome to NBA Jam Is it the shoes!? 3893 Rep 5,111 Posts Drives: (Sold) 2011 E92 335i ZMP 6MT Join Date: Mar 2014 Location: USA iTrader: (1)	It generally should be replaced because it's a TTY bolt with a one-time use locknut, but yes it can also corrode slowly over time. It has a corrosion-resistant coating that doesn't last forever.
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12-14-2020, 07:36 PM	#3
MightyMouseTech Major General 4346 Rep 6,196 Posts Drives: 13 135i 6MT LeMans Blue MSport Join Date: Feb 2013 Location: Ottawa, Canada iTrader: (0)	Torque to yield. Must be replaced.
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12-30-2020, 11:42 AM	#4
liono208 Registered 0 Rep 2 Posts Drives: 2011 BMW 328xi Join Date: Dec 2020 Location: New Jersey iTrader: (0)	does anyone have the part number to this bolt and nut and also the nut under the ball joint?
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01-02-2021, 12:21 PM	#5
whyzee125 Brigadier General 1997 Rep 4,028 Posts Drives: Dinan stage 2 335i Join Date: Jul 2014 Location: Chattanooga Tn iTrader: (0)	Dont reuse them. I loosened mine to install new struts and when I started to re torque, before it was tight it stripped and would not go in or out. Took about 3 hours with the air cut off wheel. Replace them.
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01-03-2021, 05:13 PM	#6
feuer Major General 4289 Rep 9,224 Posts Drives: wife crazy! Join Date: Apr 2015 Location: Chicago, IL iTrader: (5)	Re use. I have. Numerous times. Probably put my 2008 E90 under lot more stress than ordinary E90. Been tracking it since 2010. Zero issues with re use. Additionally many of these and also other make and models use TTY that are being re used every day. Very common to do so. Unlike the failures from reuse. If is so vital when they sell you the replacement part it sill come with replacement bolt as well.
	Appreciate 0 Quote

01-03-2021, 09:45 PM	#7
Brian86 Captain 662 Rep 786 Posts Drives: e36 M3, e91 325xi, N50 Xterra Join Date: Dec 2020 Location: Pittsburgh iTrader: (0)	Not every angle torque spec is also TTY. That's a grade 10.9 M12x1.5x85mm. 100NM+90deg does not yield that fastener. FCP euro and Bentley say to replace them... I just reuse them. And I install them Guten'tight. I'm a bad BMW owner :P If it's rusty and corroded of course replace it (with something from the local hardware store) Sometimes a bolt is just a bolt.
	Appreciate 2 feuer4289.00 lab_rat396.50 Quote