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Header Bolts

Old Mar 29, 2002 | 07:57 PM
  #1  
movinup's Avatar
movinup
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Burning Brakes
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Default Header Bolts

What are the torque specs for the header bolts on our cars?
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Old Mar 29, 2002 | 08:49 PM
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Default Re: Header Bolts (movinup)

Exhaust manifold bolt torque specs are: 1st pass- 15 Nm, or 11 ft lbs. 2nd pass-25 Nm, or 18 ft lbs.
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Old Mar 29, 2002 | 08:50 PM
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Default Re: Header Bolts (movinup)

GM manual for 2000 reads: 11 ft. lbs. on first pass
18 ft. lbs. on second pass :seeya
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Old Mar 29, 2002 | 09:00 PM
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Default Re: Header Bolts (movinup)

Also the torque sequence
Install the exhaust manifold bolts. Tighten
Tighten the exhaust manifold bolts a first pass to 15 N·m (11 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.
Tighten the exhaust manifold bolts a final pass to 25 N·m (18 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.



[Modified by C5Noir, 8:12 PM 3/29/2002]
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Old Mar 29, 2002 | 10:00 PM
  #5  
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Default Re: Header Bolts (C5Noir)

Thanks guys. My LG Longtubes have been shipped and I hope
to be installing them next weekend.
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