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Old 04-25-2021, 11:50 AM
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Default Torque?

Torque? Snowflake wheel lugnut torque? Help please.

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Old 04-25-2021, 12:20 PM
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Refer to your GM manual

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Old 04-25-2021, 12:25 PM
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Quote:
Originally Posted by burd View Post
Refer to your GM manual


Don’t have one

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Old 04-25-2021, 12:46 PM
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sooo helpful... LOL!

service manual says 90lb/ft for aluminum wheels, some year owners manuals say 70lb/ft. i usually go with about 80 & recheck after ~50 miles.

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Old 04-25-2021, 12:55 PM
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7 1/6 stud someone told me 85lbs torque.

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Old 04-25-2021, 01:08 PM
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all 2nd gen firebirds & most other cars use the same size studs, 2 different pontiac sources say 70-90lb/ft, so 80-85 should be fine.

most or too many people back then & now dont even bother with torque settings on things like this, just tight plus 1-2 ugga duggas!

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Old 04-25-2021, 01:23 PM
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Quote:
Originally Posted by 78w72 View Post
all 2nd gen firebirds & most other cars use the same size studs, 2 different pontiac sources say 70-90lb/ft, so 80-85 should be fine.

most or too many people back then & now dont even bother with torque settings on things like this, just tight plus 1-2 ugga duggas!


Lol

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Old 04-26-2021, 05:12 PM
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Thanks everyone! We looked everywhere including you tube and could not find anything.

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Old 04-26-2021, 05:39 PM
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available all day long on ebay
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Old 04-26-2021, 08:43 PM
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The torque spec for '79 WS 6 rims is 100 ft/lbs. Check them again after a couple days.

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Old 04-27-2021, 09:24 AM
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Quote:
Originally Posted by Ronc455 View Post
The torque spec for '79 WS 6 rims is 100 ft/lbs. Check them again after a couple days.
curious where you see 100lb/ft? 81 GM service manuals say 90 for Fbody alum wheels & some year owners manuals say less.

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Old 04-27-2021, 10:04 AM
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80 is plenty sufficient, 100 isn't too much. Anywhere in between 80 to 100 will work. I personally torque my alloy factory wheels at 80, they won't fall off, nor break the wheel studs at any setting in between 80 to 100.

For may years they were put on cars anytime the wheel needed to come off the car for service with an impact wrench. No one ever laid a torque wrench on them. When front wheel drive cars made their debut (1980 ish) the rotors had been lightened substantially and would warp fairly easily when overtightened. This was when many techs started figuring out that the heavy handed way they were accustomed to of installing lug nuts with only a impact wrench wasn't going to cut it, as they were damaging the brake rotors from overtightening them.

On a RWD car before 1980 the rotors are plenty substantial that if overtightened they usually won't warp, so in the case of a second gen T/A it's not critical and 80-100 will work all day long. On this particular car we're discussing, it could easily be called 80-100 Ft Lbs. If you want to split the difference and use 90, you'll be fine. Anywhere in between 80-100 won't do any damage to the car or wheel, and it won't loosen up, and fall off either.

I've put on 100s of the snowflake wheels during normal servicing and haven't had any problems as of yet. One thing to think about is, if you have a flat tire and install the spare along the road side, you won't have any way to check the torque value. You'll still reach your destination, with no damage to the car or wheel.

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Old 04-27-2021, 10:13 AM
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1978 Pontiac Service Manual page 3E-10:

Except Cast Alum Wheel (steel)

A, F, G, H, X series .............................................80 lb ft
B series with 5" bolt pattern wheels......................100 lb ft

Cast Alum Wheel

A, F, G, H series (& B series w 4 3/4 bolt pattern)....90 lb ft
B series w 5" bolt pattern....................................100 lb ft

Use of correct lug nuts & torque specs is important all wheels, ESP cast alum wheels.

Use of impact tools can destroy the seats on steel & alum wheels as well as nice original plated lug nuts.

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Old 04-27-2021, 10:17 AM
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didnt mention any damage issues... just asking where he sees 100 since GM service manuals & owners manuals for these cars with alum wheels dont show 100 anywhere ive seen... not saying hes wrong, just asking a question.

& far too many "techs" today still use impact guns to tighten lug nuts at anywhere from walmarts to what you'd think are reputable shops like goodyears, meinke, firestone etc etc.

the numbers posted by ol pinion head are what im seeing, yes 90 is close to 100 but 100 is not what GM says anywhere for these wheels & owners manuals show less.

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Old 04-27-2021, 04:32 PM
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somewhat related, I have bought my last few sets of tires (for daily drivers) through tire rack dot com. I have used the install in my driveway option. The guy that does the work does not use an impact gun and does indeed use a torque wrench when installing. First time I had ever seen a tire guy do that.

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Old 04-27-2021, 07:57 PM
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I have bought most of my tires for years from Discount Tire. For many years now they have at least gone over all of the nuts with a torque wrench. Last few times I have noticed that they seem to have their impact guns set to stun, and always finish with a torque wrench. I think that is the right answer.

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Old 04-28-2021, 04:38 PM
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We never use an impact gun on chrome lugnuts, and the ones going on these new wheels are brand new.

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