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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 Tue, May-16-2017, 09:15:37 PM   #101
Braymond141
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Default Re: Torque Spec thread

Quote:
Originally Posted by CrookedCommie View Post
Meaning they are single use, when you tighten them down they deform, so you can't effectively reuse them.
I know what Torque to Yield means. Typically a bolt that is used in that application has a angle you turn it after jointing torque. Bolts that have a one shot torque measurement are usually reusable. I've never seem them listed as TTY.

I know this quote is stating head bolts, but still applicable.

Quote:

How can you tell TTY head bolts from ordinary head bolts? TTY head bolts are typically longer and narrower than standard head bolts. Factory service manuals will tell you which applications use TTY bolts, and you can often tell from the head bolt tightening procedure if the bolts are TTY or standard. TTY bolts typically have an angle tightening specification rather than a specific torque value (which requires using an angle gauge when tightening the bolts).

Last edited by Braymond141; Tue, May-16-2017 at 09:24:37 PM.
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Old Wed, May-17-2017, 06:31:02 PM   #102
CrookedCommie
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Default Re: Torque Spec thread

Both the TIS and the Bentley manual state to use new bolts. Your call.
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Old Wed, May-17-2017, 06:37:59 PM   #103
Braymond141
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Default Re: Torque Spec thread

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Originally Posted by CrookedCommie View Post
Both the TIS and the Bentley manual state to use new bolts. Your call.
I don't reuse them, but many people do and even retailers like UUC say to reuse their bolts. If you do, a thread sealant is needed. Red loctite is actually a widely popular choice as well (done it many times on my S52 when running a SM flywheel).

For reference the used sets I have here all measure;

Set1: 57.5x-57.6xmm
Set2: 57.55-57.58mm

I need a new bolt to judge if these are stretch or not (I'm thinking no).

Last edited by Braymond141; Thu, May-18-2017 at 12:10:12 AM.
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Old Wed, May-17-2017, 09:33:14 PM   #104
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Default Re: Torque Spec thread

Ah, I had been looking for that clutch disc wear spec actually!
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Old Mon, Jul-17-2017, 03:06:25 AM   #105
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Default Re: Torque Spec thread

Beautiful thread. Thanks guys.
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Discussing Torque Spec thread 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)