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Volkswagen Jetta 2005 and later (A5) Drive Axle Bolt torque spec (Jetta MK5) clarification...


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Last Post: Mar 23, 2014 9:05 PM Last Post By: Moke
UberVW_TDI

Posts: 1
Registered: 01/14/10
Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Feb 9, 2010 12:10 AM
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I've got the Bentley Service Manual for the Jetta Mk5...

Its lists two different torque specs for the front drive axle bolts:

1. 12 point bolt, 70Nm (52 ft lb) then 90 degrees.
2. Hex bolt, 200 Nm (148 ft lb) then 180 degrees.

Thats a HUGE difference between the two bolts types! I've got the 12 point bolt.
Can someone please clairfy that the above is correct.

Thank you,

Dustin
Flash__Gordon

Posts: 3
Registered: 07/28/05
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Jan 11, 2012 7:38 PM   in response to: UberVW_TDI in response to: UberVW_TDI
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Did you ever get clarification of this?
RickW

Posts: 718
Registered: 02/16/05
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Jan 12, 2012 9:58 AM   in response to: Flash__Gordon in response to: Flash__Gordon
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Hello

I'm unsure as to why this forum post was never answered directly. We did some checking and the specifications in the book are in agreement with our source information.

Rick W
Bentley Publishers
Flash__Gordon

Posts: 3
Registered: 07/28/05
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Jan 12, 2012 1:02 PM   in response to: RickW in response to: RickW
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I am using latest version of Ebann and I don't see any mention of difference for hex or 12 point. The car is equiped with hex bolt and new bearing came with 12 point.
RickW

Posts: 718
Registered: 02/16/05
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Jan 12, 2012 2:18 PM   in response to: UberVW_TDI in response to: UberVW_TDI
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Hello again

To clarify - my earlier response was based on research I did when I was asked this same exact question a while back.

I went back and checked my up-to-date copy of eBahn. This information originates directly from VWoA and is updated periodically. As such, it appears that the source information may possibly have been updated since the last time I checked into this.

Under "Front Axle Tightening Specifications", the torque specification for drive axle to wheel hub is listed as 200 Nm (148 ft-lb) plus 180 (1/2 turn). I'm also not seeing any distinction currently in eBahn between hex or 12 point.

Here's where it gets a little confusing - under the procedure titled "Drive Axle Bolt, Loosening and Tightening", eBahn lists the torque specification as 180 Nm (133 ft-lb) plus 180 (1/2 turn).

However, I also checked against VWoA's erWin information system, and it lists the torque specification for the drive axle bolt exactly as it appears in our printed repair manual. i.e.:
1. 12 point bolt, 70Nm (52 ft lb) then 90
2. Hex bolt, 200 Nm (148 ft lb) then 180

That's the information as it comes from VWoA, and that's what I'm inclined to recommend.

Hope this helps,
Rick W
Bentley Publishers
kharmin

Posts: 11
Registered: 07/30/06
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Jan 12, 2012 6:04 PM   in response to: UberVW_TDI in response to: UberVW_TDI
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Hi, Rick -

Thank you for checking this "again" -
I've got a another question, though -

My 2006 Jetta TDI is currently in the shop for front axle replacement -
Are the 12-point and hex bolts (with the different torque specs) for different applications/locations, or are they interchangeable?
Or did one get replaced by the other, in newer replacement parts?

Want to be sure my mechanic has accurate info!

TYIA ~ Kharmin
Flash__Gordon

Posts: 3
Registered: 07/28/05
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Jan 12, 2012 7:53 PM   in response to: RickW in response to: RickW
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Thanks Rick for the information.
RickW

Posts: 718
Registered: 02/16/05
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Jan 13, 2012 9:17 AM   in response to: kharmin in response to: kharmin
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Hello, Kharmin

Unfortunately, parts interchangeability information is not part of the repair information. eBahn and erWin only note the different torques for the different types of fasteners. I'd recommend consulting a dealer to be sure.

Rick W
Bentley Publishers
Ricky58

Posts: 18
Registered: 02/11/04
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Oct 2, 2013 10:58 PM   in response to: RickW in response to: RickW
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Here is my take on this question.

My 2011 Golf TDI came from the factory with 12-point bolts marked grade 8.8. I believe this grade of bolt requires the higher torque spec.

When I had a bearing go bad, the dealer-supplied Genuine VW bearing kit came with 8.8 grade bolt (date of manufacture was June 26, 2013)
I installed it using the higher torque spec (200 nm & 180 degrees). That was 3000 miles ago and no problem. It did require a very long breaker bar, 1/2 inch drive socket, and some faith to counteract the flop sweat I felt putting all that force on it).

I purchased another bearing online (I know I'm only 6-12 months from having to change the other side) and
I did a lot of research and saw that many aftermarket bearings (good brands like SKF, ***, INA, Rueville and NSK) often had pictures of 12-point bolts with 10.9 grade markings, as well as 12-point bolts with 8.8 markings. I presume this higher bolt grade is what requires the lower torque spec, as the drive shaft is not changed during the process, and the higher strength bolt, if torqued to the higher spec would likely deform the threads of the drive shaft too much.

I don't know the significance of the 6-point hex head bolt.
Moke

Posts: 2
Registered: 03/23/14
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Mar 23, 2014 2:27 PM   in response to: Ricky58 in response to: Ricky58
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This needs to be resolved guys. There's NO way an axle bolt should get torqued to 180nm plus 1/2 turn. I tried it on my 09 tdi and the bearing lasted about 20 miles! Do you realize how tight 1/2 turn past 148lbft is? The second bearing I replaced (to replace the first over-torqued bearing) was tightened to 175 lbft, as a guess, and just failed at 3000 miles! Can someone please give me the correct torque spec? I have another bearing on order and don't want to strike out.
Thank you,
Dave
Moke

Posts: 2
Registered: 03/23/14
Re: Drive Axle Bolt torque spec (Jetta MK5) clarification...
Posted: Mar 23, 2014 9:05 PM   in response to: Moke in response to: Moke
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BTW - I forgot to mention that the replacement bearings were purchased from Rock Auto and manufactured by Flennor - a German company. The replacement axle bolts were 6 point so I went with the "6pt spec.".

Dave

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