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Torque spec for harmonic balancer bolt?

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Old 09-17-2001, 05:24 PM
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Car: 89 Turbo Trans Am and lots of non-3rd gens
Engine: 231 SFI Turbo's, LT4, LT1
Transmission: 2004r, 4L60E
Torque spec for harmonic balancer bolt?

What should the harmonic balancer bolt on a ZZ4 or L98 350ci motor be torqued to?
Old 09-17-2001, 05:47 PM
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IIRC, 70 to 75 ft-lb.

------------------
1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, MSD coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley module, ported plenum,
Ported Daytona Yellow stock base, Moroso valve covers, other stuff,
Streetdampr, Ruger P95DC, hot wife, new oil filter, !cats, !TBC, !AIR.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."
Old 09-17-2001, 11:29 PM
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My Haynes manual says 60 ft/lb.
Old 09-18-2001, 09:50 AM
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Haynes-schmaynes...

From the GM 1990 Camaro service manual, all V-8 engines, torsional damper bolt 70 ft-lb. Crankshaft pulley bolts (3 of them), 43 ft-lb.
Old 09-18-2001, 11:50 AM
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Car: 89 Turbo Trans Am and lots of non-3rd gens
Engine: 231 SFI Turbo's, LT4, LT1
Transmission: 2004r, 4L60E
Wow, glad I asked, my Service manual for my GN says 220 ft-lbs on the little V6!
Thanks
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