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BMW Non-Resusable Fasteners
 
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Pelican Technical Article:

BMW Non-Resusable Fasteners

Nick Czerula

Time:

1 hours1 hrs

Talent:

**

Tools:

Socket set

Applicable Models:

BMW E90 3-Series (2006-09)

Parts Required:

New fasteners dependent on component

Hot Tip:

Always replace aluminum and torque to yield fasteners

Performance Gain:

Proper fastener torque and lifespan

Complementary Modification:

Check to see what fasteners are needed before beginning repair.

BMW E90 models utilize fasteners that can only be tightened once. When these fasteners are removed or loosened, they are to be immediately discarded and replaced with new parts.

Self-locking fasteners have a built in locking component and once removed the locking feature is degraded and most times ruined.
Figure 1

Self-locking fasteners have a built in locking component and once removed the locking feature is degraded and most times ruined. The green arrow in this photo points to the self-locking component on the nut. Once tightened, this component is degraded and is no longer secure. You can also damage a bolt if you try to reuse a self-locking fastener, one more very good reason not to try to. Torque to yield bolts are designed to stretch only once when tightened. Therefore, once installed and tightened, they do not return to their previous length like a standard bolt would. Once removed, you cannot trust them to provide a proper fastening torque or a secure clamping force. Torque to yield bolts are known to break if reused. In our tech articles, these bolts will be noted as to be discarded when removed, but always check when ordering parts to be sure we didn't miss one somewhere. Aluminum fasteners are used all over the engine of BWM E90 models and have to be replaced each time they are removed. These bolts can break and you can end up with a corrosion problem if reused, creating a major problem if not noticed immediately.

Some aluminum fasteners have a blue paint mark on them to identify them.
Figure 2

Some aluminum fasteners have a blue paint mark on them to identify them. (green arrow) However, many have no identifying mark. It is best to test removed fasteners using magnet to see if it is made of aluminum.

Aluminum fasteners are sold in sets depending on what repair you are performing.
Figure 3

Aluminum fasteners are sold in sets depending on what repair you are performing. It is a good idea when ordering parts for your vehicle to ask if there is a bolt kit related to your repair. The set of fasteners shown in this photo are required when replacing the water pump, sold as a set. Remember to always make a complete part list and check with our parts specialists to be sure you have everything you need. There is no worse feeling than tearing into a weekend project and not being able to finish the procedure due to not having everything you need.

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Comments and Suggestions:
Sk2andbmw Comments: I need to change the engine from my 2011 328i xdrive . Do i need to buy new fastener to do the job?
October 26, 2016
  Followup from the Pelican Staff: yes. - Nick at Pelican Parts  
Felix G Comments: I need two E8, the one on the right they hold the two front camshaft sensor, the one that you suggested is an E10 the one on the left, Do you know if you have them? Like I said I am about to order another sensor, want to order the right bolt this time.
July 22, 2016
  Followup from the Pelican Staff: Yes. Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
William Klodaski Comments: How do i order the blue headed aluminium bolts? I need these in order to change out my starter
April 21, 2015
  Followup from the Pelican Staff: They come in kits for the repair you are performing. Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 

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Page last updated: Fri 12/9/2016 02:22:11 AM