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Heat shield fell off!

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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Nictrix
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Heat shield fell off!

Post by Nictrix » Wed Oct 18, 2017 5:29 pm

A couple of weeks ago I put a full set of disks and pads on the car and while I was looking around under the car I spotted something that was not attached.
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A heat shield. By the looks of it should have been attached to one of the underbody covers by rivets but the rivets were gone and this was just rattling about. Funnily enough it didnt seem to make any noise inside the car.
So the rain went off today and I jacked the car up and with the help of some bolts, washers and nylock nuts its back in place.
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Not sure how much it is needed but its back on now.
On another note, I seem to have found a jacking point under the car at the rear of the engine for anybody thats ever wondered if there is one.
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E89 2014 35i M Sport Black with Black leather :)

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ph001
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Heat shield fell off!

Post by ph001 » Wed Oct 18, 2017 5:45 pm

Good spot. The aluminium won't last long in contact with a steel bolt though due to galvanic corrosion. You ideally need to electrically isolate the two with a fibre washer or something.
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Heat shield fell off!

Post by Nictrix » Wed Oct 18, 2017 6:10 pm

I assume it was aluminium rivets originally then. They lasted somewhere between 0 and 7 years.
I will have to swap them out for something else if thats going to happen, even if it will be in years to come.
I wonder if it would be better with plastic reg plate nuts and bolts?
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EssexZed

Heat shield fell off!

Post by EssexZed » Wed Oct 18, 2017 6:23 pm

This happened to my 2010 model after 5 years. I had an AUC warranty on the car so got the dealer to reattach it. They re-rivetted it back on.

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Heat shield fell off!

Post by ph001 » Wed Oct 18, 2017 6:37 pm

Yeh nylon nuts and bolts would be ideal :thumbsup:
2007 E85 Z4 3.0Si manual :driving:
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby

2004 E46 M3 coupe manual - gone but not forgotten.

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Heat shield fell off!

Post by buzyg » Wed Oct 18, 2017 8:25 pm

ph001 wrote: Wed Oct 18, 2017 6:37 pm Yeh nylon nuts and bolts would be ideal :thumbsup:
How hot could it get. Nylon may not be ideal. Maybe some small gasket type washers. Just a thought.
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Nictrix
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Heat shield fell off!

Post by Nictrix » Wed Oct 18, 2017 11:53 pm

buzyg wrote: Wed Oct 18, 2017 8:25 pm
ph001 wrote: Wed Oct 18, 2017 6:37 pm Yeh nylon nuts and bolts would be ideal :thumbsup:
How hot could it get. Nylon may not be ideal. Maybe some small gasket type washers. Just a thought.
There is a downpipe above it but I wouldnt think it would get hot enough to melt plastic bolts.
Seeing as I already have nuts and bolts in it I will look for fibre washers to seperate the washers on the other side from the heat shield.
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Heat shield fell off!

Post by flybobbie » Thu Oct 19, 2017 12:17 am

I bolted mine back on with stainless nuts and bolts.
Seems fairly common to fall off.
The plastic under shield probably vibrates a lot and the rivets break off.

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