rebuilding a honda negine this week. was wondering how high does the ft/lbs go on the bolts?

 

one that ranges from 0 up to around 120lb/ft should see you do just about the entire engine BAR the crank pulley bolt .
lightest bolts are the ends cam caps (10lb/ft i think) and the head bolts/arp head nuts are the highest at around 70 odd. (waterpump/oilpumo etc are all around the 10-20 lb.ft region)

 

I find 2 torque wrenches always works best.

I personally have these 2 from snap on:
http://buy1.snapon.com/catalog...talog

http://buy1.snapon.com/catalog...talog

Mind you, I also do alot of drive line work, so I needed something capable of doing 180+ ft-lbs.

 

thanks guys. i have a craftsman that goes up to 75ft/lbs. do you think that would be enough?

 

If it's calibrated.

 

I use several Snap Ons. Bear in mind the accuracy range of the wrench you use.

 

this my friend, is father of all torque wrenches

http://buy1.snapon.com/catalog...l=all

 

Looking for some help with torque wrenches... I plan on doing some work on the car in the near future from playing with cam seals, brake/rotors, and water pump/timing belt, so I figure with the money I'll save on labor I should invest in a good torque wrench or two. I've seen good reviews on the Precision split beam click type and wonder if anyone has any experience with them.

http://www.toolsource.com/spli...oogle

I was figuring on getting two; one for low end torque, I think the lowest I need is 7.5ft/lbs(I drive an integra). The one linked above would cover 0-50 ft/lbs which would totally cover my low end. Then I was thinking about getting the same brand, only something that would cover like 25or50-150 ft/lbs.

A few things I've heard and want to clear up;

if you use an adapter, say a 1/4" for the 3/8" linked above, does it take away from the accuracy of the wrench?

and

20% from full scale is supposed to be accurate to 4%. So that means, again using the linked one above, that from 10-40 ft/lbs would be accurate to 4%. How accurate would it be between 0-10 ft/lbs and 40-50 ft/lbs?

I know that the snap ons are probably a favorite of most people, But the only way I could justify paying that much for that wrench(right now anyway) is if I could get one that would be accurate for my 7.5ft/lbs to 150ft/lbs. Thanks for any help and sorry if these are common knowledge questions!

 

mac tools offers some pretty good priced ones

 

use the smallest one to get the job done.


IE: dont use a 150lbs wrench to torque a bolt that needs 20 ftlbs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">use the smallest one to get the job done.


IE: dont use a 150lbs wrench to torque a bolt that needs 20 ftlbs</TD></TR></TABLE>

lol.....

Here's what I use! Best one on the market.... IMO

http://buy1.snapon.com/catalog...talog

 

now do the electronic ones have any kind of calibration ?


I have a 3/8 flex head snap on that was great but from what i remember it didnt go high enough to torque the main bolts.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lude98SH &raquo;</TD></TR><TR><TD CLASS="quote">now do the electronic ones have any kind of calibration ?


I have a 3/8 flex head snap on that was great but from what i remember it didnt go high enough to torque the main bolts. </TD></TR></TABLE>

Yes they do! Mechanics in the aviation industry use these tools and from what I'm told, it is mandatory that they calibrate their torque wrench every 3 months.

Most 3/8 drive torque wrenches from Snap-On have a range of 5-100 ft/lbs. A 3/8 click type torque wrench should only be used within a window of about 20-80 ft/lbs. for the most accurate results. Digital torque wrenches don't have that problem, again, from what I'm told...

 

Hmm well the spec on my mains is 54 ftlbs so i must of been thinking of something else.


Modified by lude98SH at 7:24 PM 9/17/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AllMotorRandy &raquo;</TD></TR><TR><TD CLASS="quote">

Yes they do! Mechanics in the aviation industry use these tools and from what I'm told, it is mandatory that they calibrate their torque wrench every 3 months.

Most 3/8 drive torque wrenches from Snap-On have a range of 5-100 ft/lbs. A 3/8 click type torque wrench should only be used within a window of about 20-80 ft/lbs. for the most accurate results. Digital torque wrenches don't have that problem, again, from what I'm told... </TD></TR></TABLE>

So even though it has a range of 5-100 ft/lbs, you should only use it for 20-80 ft/lbs. So it would be no good for bolts requiring 7.5ft/lbs? This is kinda annoying . I should get one in in/lbs then for the small stuff and then another for higher torque needs. I'd love to get a snap on but they're like $250 minimum and I'd need two of them...

 

A torque setting used for a fastener should fall within 20%-90% of the range of the torque wrench used....typically. That is an industrial standard, but you can ask a manufacturer what they recommend.

 

I'll start calling up some companies and see what they say. It seems people just kinda pick a wrench and go with it, which is what I was about to do, but I thought I'd do my homework first.

 

keep in mind that not all parts are critical to torque to spec. for example, oil pan bolts require around 10ish ft-lbs. if you use hondabond 2 seal the pan, it will have more holding strength the torquing the bolts to 10 lbs.

Same thing can be said for things like spark plugs or valve cover bolts. Yes, they need to be tight, and there technically is a torque spec of them, however I have yet to meet a tech that actuially torques spark plugs or valve cover bolts, or oil pan bolts on a daily basis. Usuially the important stuff, like cam caps, main caps, water pump, oil pump and anything with a specific bearing preload should be torqed to spec for longjevity and greater performance for a longer life. This is mostly true with wheel bearings. People tend to ream them on with an impact gun, which can send them way over the 170ish torque rating, which exponentially increases the preload on the bearing, killing the part sooner then expected. Then customers wonder why an aftermarket wheel bearing lasts them 2 years.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AllMotorRandy &raquo;</TD></TR><TR><TD CLASS="quote">

Yes they do! Mechanics in the aviation industry use these tools and from what I'm told, it is mandatory that they calibrate their torque wrench every 3 months.

Most 3/8 drive torque wrenches from Snap-On have a range of 5-100 ft/lbs. A 3/8 click type torque wrench should only be used within a window of about 20-80 ft/lbs. for the most accurate results. Digital torque wrenches don't have that problem, again, from what I'm told... </TD></TR></TABLE>

I was hoping for this, but it looks like they're accurate from 20-100% of full scale.

http://buy1.snapon.com/product...E.pdf


Modified by vinuneuro at 10:34 PM 10/7/2008