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Torque Specification for 325i
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CarGuru > BMW > Torque Specification for 325i 9 April 2005 02:19:19

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Torque Specification for 325i

00_cp_d12 9 April 2005 02:19:19
 I want to help my friend to change the summer tires, anyone knows the nut
torque for 2003 BMW 325i ?

Please help..


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Jeff Strickland 6 April 2005 22:15:11 permanent link ]
 85 ft pounds.




"00_CP_D12" <00_CP_D12@NOSPAN.c­om> wrote in message
news:G4idnYGlBMCMvs­nfRVn-sA@rogers.com.­..> I want to help my friend to change the summer tires, anyone knows the nut> torque for 2003 BMW 325i ?>
Please help..>


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Bfd 7 April 2005 23:02:47 permanent link ]
 Interesting, my local BMW independent, who only works on BMWS, only
recommends 70 ft-lb.!

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Marcio Watanabe 7 April 2005 23:49:18 permanent link ]
 "bfd" <bfd853@yahoo.com> wrote:
Interesting, my local BMW independent, who only works on BMWS, only>recommends 70 ft-lb.!

The problem with independents is that sometimes they are not up to
date with the factory recommendations, and they work on older cars.
Most BMWs built before 1990 probably had such low specs (heck I think
for the 2002ti, it was only 60 lb-ft).

The factory recommendation for the E46 is 120 Nm +/- 10 Nm (88 lb-ft
+/- 7 lb-ft).

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Daniel Arrepas 8 April 2005 01:35:39 permanent link ]
 
"bfd" <bfd853@yahoo.com> wrote in message
news:1112900567.909­500.153100@f14g2000c­wb.googlegroups.com.­..> Interesting, my local BMW independent, who only works on BMWS, only> recommends 70 ft-lb.!

It depends on the wheels. In the US where all E46's were/are light-alloy
wheels, 85 lb. is the spec. per the manual.

You should ask him why he recommends 70. For any car that is on the very low
side.


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Bfd 8 April 2005 02:32:03 permanent link ]
 Let me clarify, for my 1990 535i, 100K, 5speed, my independent
recommends 75 ft-lb. Hey, why risk warpping the brake rotors....

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Daniel Arrepas 8 April 2005 04:05:32 permanent link ]
 
"bfd" <bfd853@yahoo.com> wrote in message
news:1112913123.176­233.18910@l41g2000cw­c.googlegroups.com..­.> Let me clarify, for my 1990 535i, 100K, 5speed, my independent> recommends 75 ft-lb. Hey, why risk warpping the brake rotors....

If you think the spec will warp them, then why think 75 won't? Hell, get the
kid down the block to hand-tighten them and be certain they won't warp :^)­


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Dave Plowman 8 April 2005 14:12:34 permanent link ]
 In article <1112913123.176233.­18910@l41g2000cwc.go­oglegroups.com>,
bfd <bfd853@yahoo.com> wrote:> Let me clarify, for my 1990 535i, 100K, 5speed, my independent> recommends 75 ft-lb. Hey, why risk warpping the brake rotors....

Don't be silly. The torque clamping the discs to hub has no influencer on
warping.

--
*The problem with the gene pool is that there is no lifeguard *

Dave Plowman dave@davenoise.co.u­k London SW
To e-mail, change noise into sound.
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Malt_Hound 8 April 2005 19:10:48 permanent link ]
 bfd wrote:> Let me clarify, for my 1990 535i, 100K, 5speed, my independent> recommends 75 ft-lb. Hey, why risk warpping the brake rotors....>

You risk warping the rotors mostly when you have uneven torquing. I
don't think 10 ft/lbs one way or another will make any difference. You
toirque wrench is not likely to be that accurate anyway... Repeatable,
yes, but absolute accurate, no.

-Fred W
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Malt_Hound 8 April 2005 19:13:43 permanent link ]
 Dave Plowman (News) wrote:> In article <1112913123.176233.­18910@l41g2000cwc.go­oglegroups.com>,> bfd <bfd853@yahoo.com> wrote:>
Let me clarify, for my 1990 535i, 100K, 5speed, my independent>>recomm­ends 75 ft-lb. Hey, why risk warpping the brake rotors....>
Don't be silly. The torque clamping the discs to hub has no influencer on> warping.>

It can if the torque is uneven as the heat exchange to the wheel then
becomes uneven. ...or so I have heard. Perhaps this is but another
URL(Urban Automotive Legend)?

-Fred W
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Daniel Arrepas 8 April 2005 20:07:32 permanent link ]
 
"Dave Plowman (News)" <dave@davenoise.co.­uk> wrote in message
news:4d58543543dave­@davenoise.co.uk...>­ In article <1112913123.176233.­18910@l41g2000cwc.go­oglegroups.com>,> bfd <bfd853@yahoo.com> wrote:>> Let me clarify, for my 1990 535i, 100K, 5speed, my independent>> recommends 75 ft-lb. Hey, why risk warpping the brake rotors....>
Don't be silly. The torque clamping the discs to hub has no influencer on> warping.

Torqueing itself won't warp rotors, but the expansion from heat buildup
will, and to what I have read and heard the torque spec is devised to allow
expected expansion without warping. I know on certain cars with certain
composite rotors, the WJ grand Cherokee for example, torque levels at the
lugs is a huge issue with keeping rotors true. So I don't think bfd's
concern is unfounded, I just don't think it is well premised if the
specified, or close to specified, torque input is used.



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Jeff Strickland 8 April 2005 20:29:54 permanent link ]
 Why risk the lug bolts falling out?

The spec is 85 ft lb.




"bfd" <bfd853@yahoo.com> wrote in message
news:1112913123.176­233.18910@l41g2000cw­c.googlegroups.com..­.> Let me clarify, for my 1990 535i, 100K, 5speed, my independent> recommends 75 ft-lb. Hey, why risk warpping the brake rotors....>


Add comment
Raybender 8 April 2005 22:06:48 permanent link ]
 

"Dave Plowman (News)" wrote:
In article <1112913123.176233.­18910@l41g2000cwc.go­oglegroups.com>,> bfd <bfd853@yahoo.com> wrote:> > Let me clarify, for my 1990 535i, 100K, 5speed, my independent> > recommends 75 ft-lb. Hey, why risk warpping the brake rotors....>
Don't be silly. The torque clamping the discs to hub has no influencer on> warping.>

Sure it does. Had no problem with my 328 when it was new. After the dealer
took the wheels off during service, the steering wheel would jerk to one side
as I applied the brakes when coming to a traffic light. Went back and told
them to torque the wheels properly - no more problem. (Could have done it
myself, but I was pissed) Turns out the dealer couldn't properly balance the
tires either. I decided to end our relationship.

Frank

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Marcio Watanabe 8 April 2005 23:27:35 permanent link ]
 "bfd" <bfd853@yahoo.com> wrote:
Let me clarify, for my 1990 535i, 100K, 5speed, my independent>recomme­nds 75 ft-lb. Hey, why risk warpping the brake rotors....

I'll take the risk of warping the brake rotors over the risk of the
wheels falling off.

Add comment
Dave Plowman 9 April 2005 02:19:19 permanent link ]
 In article <4256C83A.657B326C@­NOSPAMsbcglobal.net>­,
Raybender <raybender@NOSPAMsb­cglobal.net> wrote:> > Don't be silly. The torque clamping the discs to hub has no influencer> > on warping.
Sure it does. Had no problem with my 328 when it was new. After the> dealer took the wheels off during service, the steering wheel would jerk> to one side as I applied the brakes when coming to a traffic light. > Went back and told them to torque the wheels properly - no more problem.> (Could have done it myself, but I was pissed) Turns out the dealer> couldn't properly balance the tires either. I decided to end our> relationship.

I'm sure they were happy to see the back of you too. ;-)­

--
*I want it all and I want it delivered

Dave Plowman dave@davenoise.co.u­k London SW
To e-mail, change noise into sound.
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CarGuru > BMW > Torque Specification for 325i 9 April 2005 02:19:19

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