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Old 11-30-2009, 01:05 PM   #1 (permalink)
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Whats a torque wrench?

I have read alot about measuring the torque of bolts, but what exactly is it? Do I just need 1, or do I have to buy a whole set? I went online to NAPA and seen different ones, which should I buy?

Many of the ones I seen are expensive as fuck, think I only seen one in the 25 range

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Old 11-30-2009, 01:21 PM   #2 (permalink)
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You don't absolutely need a torque wrench -- they're most useful if you're the sort that thinks every bolt needs to be jammed down as tight as possible. And they don't have to be expensive -- I got by for years with a couple of Sears beam-deflection wrenches. Harbor Freight also sells some reasonably priced click-type wrenches.

Click-type torque wrenches are the most useful for auto use -- that way you don't have to get in position to read the scale on a beam wrench. At a minimum, I'd keep a 3/8" drive click-type that reads in inch-pounds for the low torque stuff (spark plugs, fill plugs, valve cover bolts, etc), and a 1/2" drive click-type that reads in ft-pounds for the bigger stuff.
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Old 11-30-2009, 01:34 PM   #3 (permalink)
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There are a variety of torque wenches out there with differences in quality as well. Beam type are usually cheapest but can be hard to use in tight places. I use a click-type myself but it's important to return it to it's lowest setting after use to release pressure on the spring. It also takes a bit of practice to use correctly. Dial types are good but again, sometimes hard to read in tight/dark spaces. You may need both an inch/pound and foot/pound wrench. While conversions can be made, usually the ft/lb will not set low enough to accurately torque an in/lb setting and in/lb wrenches won't go high enough for most ft/lb settings. I would start out with a ft/lb wench for general auto work. I've found my Craftsman click type to be just fine. I'm able to 'test' it against annually calibrated Snap-On' s from work and it seems to have held up well. Sure others can give you better advice but that's my 2 cents.
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Old 11-30-2009, 03:12 PM   #4 (permalink)
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i was shocked the other day i was strolling through walmart and saw they now sell torque wrenches, i only saw ft lb versions no inch lbs yet
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Old 11-30-2009, 06:24 PM   #5 (permalink)
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I have both a click type and beam type in lb-ft. I also own a click type lb-in. That being said, if you're on a budget and don't wrench often, a beam type is probably the best. Cheap, easy to calibrate (by bending the needle to zero), and no special storage concerns.

edit: torque wrenches are especially important when mounting wheels. Overtightening the bolts can result in warped rotors or damaged wheels. Undertightening will result in insufficient preload, and the wheel will likely fall off during use.

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Old 11-30-2009, 07:25 PM   #6 (permalink)
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I try to use torque wrenches for as many bolts that I don't use the "calibrated arm" for, such as oil changes. Lug nuts, brake calipers, etc I would definitely use a torque wrench.

You can start by getting a 1/2"-drive, that's in the range of up to 150 lb/ft. This one often goes on sale for <$15.
http://www.harborfreight.com/cpi/cta...Itemnumber=239

With an 1/2-3/8" adapter you can do quite a bit with it. But just be aware that any torque wrenches are not as accurate in the lower 20% of its range.

That's why you may want to get a 3/8"-drive as well. Again, often on sale <$15. http://www.harborfreight.com/cpi/cta...Itemnumber=807

The 1/4" I typically use for transmission filters/strainers and pan bolts. Brake bleeder screws too, especially on aluminum calipers. But this one is typically more costly, ~$20 on sale. http://www.harborfreight.com/cpi/cta...temnumber=2696

I also have Danaher-made torque wrenches, such as those branded as Craftsman or Lowe's Kobalt. I don't need $300-400 Snap-on wrenches. But those are pretty good.

So get a 1/2" first and maybe a 3/8" from Harbor Freight for starters. And go from there.

And get one set of this, some while back it was $1.99 on sale, but it's more now IIRC:
http://www.harborfreight.com/cpi/cta...temnumber=1793



Quote:
Originally Posted by 96ToyoCam164K View Post
I have read alot about measuring the torque of bolts, but what exactly is it? Do I just need 1, or do I have to buy a whole set? I went online to NAPA and seen different ones, which should I buy?

Many of the ones I seen are expensive as fuck, think I only seen one in the 25 range
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Old 11-30-2009, 07:26 PM   #7 (permalink)
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Quote:
Originally Posted by masteryota1 View Post
i was shocked the other day i was strolling through walmart and saw they now sell torque wrenches, i only saw ft lb versions no inch lbs yet
I saw the same thing the other day and was a bit shocked.

Anyone that does anything to there car any more serious than changing their oil should likely own a torque wrench. You can get one for $20 and you could probably spend $2,000 on one if you'd like. I've had nothing but excellent experiences with the $20 I purchased from Harbor Freight. It's one of the few Harbor Freight items I'd be willing to recommend.

http://www.harborfreight.com/cpi/cta...Itemnumber=239
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Old 11-30-2009, 07:30 PM   #8 (permalink)
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You know, don't worry about not knowing torque wrenches. A lot of mechanics out there don't either.
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Old 11-30-2009, 09:00 PM   #9 (permalink)
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Quote:
Originally Posted by JohnGD View Post
You know, don't worry about not knowing torque wrenches. A lot of mechanics out there don't either.
Seriously. The only thing ive used one on is during an engine rebuild....

Torque wrenches can be more harm than good. Alot more easier to snap a bolt if you just keep on going and going waiting for that click....


Torque specs are barely even a priority with basic stuff.
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Old 12-01-2009, 08:21 AM   #10 (permalink)
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I need torque wrench for valve cover bolts but only place where I can find low pressure wrenches are on amazon.
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Old 12-01-2009, 08:59 AM   #11 (permalink)
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Quote:
Originally Posted by muminiasty View Post
I need torque wrench for valve cover bolts but only place where I can find low pressure wrenches are on amazon.
Autozone sells a 3/8" drive torque wrench that works in inch lbs.

http://www.autozone.com/autozone/cat...=Torque+Wrench
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Old 12-02-2009, 01:55 AM   #12 (permalink)
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seriously am i the only one that was surprised when the title was read? i know ova on 3SI or 3S Tech (3000GT/Stealth forums) something like this would get laughed at made fun of closed and erased from the database. ToyotaNation yall are nice..... REALLY REALLY REALLY NICE!!!!
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Old 12-02-2009, 02:16 AM   #13 (permalink)
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Quote:
Originally Posted by ashybone View Post
seriously am i the only one that was surprised when the title was read? i know ova on 3SI or 3S Tech (3000GT/Stealth forums) something like this would get laughed at made fun of closed and erased from the database. ToyotaNation yall are nice..... REALLY REALLY REALLY NICE!!!!
Even while knowing what a torque wrench is, I still haven't torqued anything to spec on my car. Last time I needed to, I realized the torque wrenches I have don't go above 150 ft/lbs. A few months ago I couldn't tell you what a torque wrench was. I would have just assumed it was a type of socket wrench, which is true, just not specific enough. You can get away with not torquing shit to spec for.... ever, really. As long as you tighten it hard enough and evenly (when there are multiple bolts/nuts for a cover etc), you're good. If too hard and you break a bolt, oh well, replace it. That doesn't happen much unless the bolt is old and brittle. I will say that anyone who laughs at someone for not being familiar with a torque wrench is likely an elitist, or just an asshole. I'd be long gone from this forum if it was overwhelmingly filled with such persons.
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Old 12-02-2009, 03:37 PM   #14 (permalink)
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Growing up, cars were overbuilt in some respects. I only used torque wrenches when changing head gaskets. Most everything else could usually handle what you could put into it. You could crank down lug nuts to where it took almost super human effort to remove without warping the wheels but not anymore. Now things seem to be built just above what is required to actually function. I've had tire places screw my wheels up by over-tightening them and they should know better. I have better luck with tranny pans and drain plugs with a torque wrench than without.Try getting an oil or tranny pan to seal after someone's cranked the bolts too much. Experience the thrill of a stripped drain plug or even leaking from a damaged drain plug seal/gasket sometime. Does one really need a torque wench? No, but it sure doesn't hurt if used properly.
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