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  #21  
Old 11-18-2016, 03:21 PM
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I stand corrected for all the reasons you mentioned.
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2005 X5 4.8IS
The Blue ones are always FASTER....

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  #22  
Old 11-18-2016, 03:26 PM
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Quote:
Originally Posted by oldskewel View Post
.... Besides, unless you have one of the 1% of x5's without a perpetually oil-coated stiffening plate, you don't need to worry about corrosion.
Oh no - there must have something wrong with my X5 - there's supposed to be oil on the stiffening plate? What grade should I put on there and how much?
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  #23  
Old 11-18-2016, 03:49 PM
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I have removed and installed the stiffing plate many times, always by myself. I have not had to use any special tools. I always replace both the nuts and bolts. As you mention there are many schools of thought, my default position is always to do as recommended by BMW in cases such as this.
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  #24  
Old 11-18-2016, 04:37 PM
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Quote:
Originally Posted by wpoll View Post
Oh no - there must have something wrong with my X5 - there's supposed to be oil on the stiffening plate? What grade should I put on there and how much?
I think the consensus for the 3.0L M54B30 is Shell Rotella T6, 5W40, probably about a pint or so...
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  #25  
Old 11-18-2016, 04:46 PM
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Crap...Now I have to go and buy another oil......
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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
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  #26  
Old 11-18-2016, 04:50 PM
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Quote:
Originally Posted by StephenVA View Post
Crap...Now I have to go and buy another oil......
No worries, Stephen... I hear the V8's use Louisville Cardinal tears as lubricant in lieu of oil... quite an abundance of that today...
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  #27  
Old 11-18-2016, 05:33 PM
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No no no. Oil leaks and Coolant leaks on V8 are not leaking some thing like fluids as they are really leaking $$$$.

But then the 3.0 leaking at the Oil filter housing are leaking labor through that $9.88 gasket....
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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
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  #28  
Old 11-20-2016, 09:04 AM
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If you would be so kind as to follow up on this after doing the work that would be greatly appreciated. I have a leak from the front of the stiffening plate as well. I wanted to remove the plate and have a look but the bolt issue has prevented me from simply taking an exploratory looksee. The X is my only driver right now and I must complete the task in one sitting as it were. Thanks.
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  #29  
Old 11-20-2016, 09:37 AM
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Quote:
Originally Posted by oldskewel View Post
Grade 8 is not the same as (8.8). Grade 8 is used for rating SAE bolts. The equivalent rating for Metric would be Class 10.9. "Class" for Metric, "Grade" for SAE. Class 10.9 is what these BMW overpriced bolts are rated at. Grade 5 SAE bolts are similar in strength to Class 8.8. Grade 8 SAE ~ Class 10.9.

I would just stick with M10 10.9 bolts. And make sure you get the right thread pitch too, since that affects the actual bolt stretch that occurs when you torque or TTY them down.

Stainless - no, don't do that. Stainless will be weaker, and it seems clear BMW was concerned with a specific strength rating here. If it says 10.9 on the bolt, it will be what you want. If it does not, keep looking. Besides, unless you have one of the 1% of x5's without a perpetually oil-coated stiffening plate, you don't need to worry about corrosion.
Good summary!

My go-to reference for hardware is Carroll Smith's "Nuts, Bolts, Fasteners and Plumbing" ... https://www.amazon.com/Fasteners-Plu.../dp/0879384069

It's a superb reference book.
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  #30  
Old 11-21-2016, 06:12 AM
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I did the fluid maintenance a few years ago. I re-used the bolts.
Not sure why BMW said it is TTY bolt.
When looking at the bolts, they are big like wheel lugs and they looked just fine w/o any stretch marks typically seen in TTY bolts (such as head gasket bolts).

BTW, there are some repair manuals (on certain car models) that say replace the wheel lugs when changing tire. I just laugh at it.

Just relax, Saturday mechanics don't fix car for a living, so they follow the Bible to the "t". BMW mechanics tell me they re-use the bolts.

I posted the DIY below. The key thing is "relax", don't lose sleep over this TTY thingy, it is an overkill when it comes to these 6 bolts:

http://www.xoutpost.com/bmw-sav-foru...se-fluids.html
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