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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 01-14-2009, 07:14 PM   #1
Tater49
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Header Torque Specs

I used thesearch feature already, so please no one tell me to use! Anyway, I can't seem to find the torque specs for headers for my 328i. I just ordered headers and they should be here on Friday, and before I install them on Saturday, I want to make sure I have all of the neccesary information. Anyone got them?
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Old 01-15-2009, 12:26 AM   #2
PEI330Ci
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Quote:
Originally Posted by Tater49 View Post
I used thesearch feature already, so please no one tell me to use! Anyway, I can't seem to find the torque specs for headers for my 328i. I just ordered headers and they should be here on Friday, and before I install them on Saturday, I want to make sure I have all of the neccesary information. Anyone got them?
If you can fit a torque wrench in there, you deserve a prize. You'll be lucky to fit a wobble drive / flex socket in there...

What I would do, is get all new studs and nuts from your local BMW dealership. It's well worth the cost considering the headaches you'll have with the rusted out original ones.
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Old 01-15-2009, 12:31 AM   #3
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I think 15 ft-lb to the cylinder head, O2 sensors should be at 37 ft-lb, connecting to the front pipes 22 ft-lb
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Old 01-15-2009, 04:15 AM   #4
PEI330Ci
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Originally Posted by LABMW13 View Post
I think 15 ft-lb to the cylinder head, O2 sensors should be at 37 ft-lb, connecting to the front pipes 22 ft-lb
Your #s are correct, but I have yet to use them. For example, the socket that properly fits over O2 sensors costs more than what most people spend on a torque wrench. The torque # for the front pipes is usually irrelivant, because the fasteners are usually so rusted out that it takes a fair amount of effort just to turn them.

Speaking of rust, make sure you apply a small amount of anti-sieze on the threads of the o2 sensors when installing them. I've seen a few O2 sensors destroyed trying to remove them because they are rusted in...

Advice from a guy that doesn't know jack!
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