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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Dec-11-2010, 09:17:17 PM   #21
kuksul08
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I'll be picking these up soon. $1.91 each at the local dealer but not in stock.
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Old Thu, Dec-16-2010, 10:22:30 PM   #22
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Great DIY and I've had these bolts back on me before. My friend tighten it up for me but it just got lose again. The M3 did make a loud clunking noise due to the loose diff bolts. I'll definitely look into buying the upgraded bolts. Mines backed out the first time from taking my M3 to the track. The wheel hops progressively loosened the bolts and so did some donuts.
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Old Fri, Dec-17-2010, 04:29:37 AM   #23
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can anyone share a bit more information on the sad accident? so the jack stand isn't enough? hmm .. it got me scared since i used to use only 2 3TON jack stand when getting down there >"<
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Old Fri, Dec-17-2010, 06:25:37 AM   #24
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Quote:
Originally Posted by chalaka View Post
can anyone share a bit more information on the sad accident? so the jack stand isn't enough? hmm .. it got me scared since i used to use only 2 3TON jack stand when getting down there >"<
It was one of the guys on svtperformance.com. He was changing the clutch on his whippled cobra and it shifted and dropped on him. Neighbors heard him calling for help and called 911. By the time they got the car off of him he was already gone. It was really sad.

Just have a couple "back up's" I always have a jack next to me that is not holding up the car, but basically giving it something to fall onto other than me. I use boards under the wheels when they are on and put the wheels under the car when they are off with a towel over them. It protects the faces of them from little things, but obviously not a car falling on them. A car is a car. Replaceable. Lives are not. I am over cautious (if that is possible) when working under cars.
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Old Fri, Dec-17-2010, 09:05:24 AM   #25
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Originally Posted by suaveflooder View Post
It was one of the guys on svtperformance.com. He was changing the clutch on his whippled cobra and it shifted and dropped on him. Neighbors heard him calling for help and called 911. By the time they got the car off of him he was already gone. It was really sad.

Just have a couple "back up's" I always have a jack next to me that is not holding up the car, but basically giving it something to fall onto other than me. I use boards under the wheels when they are on and put the wheels under the car when they are off with a towel over them. It protects the faces of them from little things, but obviously not a car falling on them. A car is a car. Replaceable. Lives are not. I am over cautious (if that is possible) when working under cars.
thanks, Suaveflooder ..for filling me in with the details ..
man it's truly a sad thing to hear about ..

i'll make sure i purchase more jack stand then .. and adapt your backup plans ..
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Old Fri, Dec-17-2010, 12:07:55 PM   #26
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It's been over a year since I did this, but for some reason I remember there being 3 bolts. Am I crazy?

Nice DIY, btw
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Old Fri, Dec-17-2010, 05:36:53 PM   #27
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OP, great DIY. I'm surprised no one else (that I've read) has fingered these bolts as the likely suspect for the clunk.
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Old Fri, Dec-17-2010, 06:43:38 PM   #28
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thanks, Suaveflooder ..for filling me in with the details ..
man it's truly a sad thing to hear about ..

i'll make sure i purchase more jack stand then .. and adapt your backup plans ..
I have 4 jack stands, a set of wheel stops and two jacks. All in a one car garage. that makes things SUPER inconvenient, but it keeps me safe

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It's been over a year since I did this, but for some reason I remember there being 3 bolts. Am I crazy?

Nice DIY, btw
I only saw two, but I might get back under there and take a look just in case I missed one

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OP, great DIY. I'm surprised no one else (that I've read) has fingered these bolts as the likely suspect for the clunk.
Agreed. Like I said, it's still there, but way less.
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Old Thu, Dec-30-2010, 10:24:20 PM   #29
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Default Re: Differential Bolts replacement DIY: updated bolts

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Originally Posted by Obioban View Post
It's been over a year since I did this, but for some reason I remember there being 3 bolts. Am I crazy?

Nice DIY, btw
You're right, there's a 3rd bolt at the front of the differential. It's securing the diff to the diff carrier with a rubber bushing. It's the bolt #9 in this illustration:
http://bmwfans.info/parts/catalog/E4..._axle_carrier/

The rear bolts are #10 in the illustration.

I heard that it's a PITA to get to the front bolt though. Maybe some people who tried to change or tighten the front bolt can chime in.
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Old Sun, Jan-02-2011, 02:39:02 AM   #30
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Default Re: Differential Bolts replacement DIY: updated bolts

a fully threaded bolt is often times weaker than a partially threaded bolt like the replacement ones shown in the OP's photos. There is more material and not nearly as many crack prone spots created by the threads... also, they could very well be made of a stronger steel.
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Discussing Differential Bolts replacement DIY: updated bolts in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)