tungren

How much torque to tight 2008 Corvette's spark plugs

mikeCsix

It isn't much, IIR, 11 inch pounds.

gsflyer2011

You mean foot pounds?

Bruze

"Just snug."

jackjohnson_218

Like a bug in a rug.

irok

15 lb/ft for new cylinder heads and 11 lb/ft for subsequent plug changes according to factory service manual

Must_Have_Z

What irok said. And get yourself a quality torque wrench. Those cheapo's at Harbor Freight are not good for low torque applications. Ask me how I know.

iw172

don’t forget the anti seize you’ll be glad later

windyC6

I'd rather depend on one of those old fashion long needle & scale torque wrenches than anything from H-Freight as their tools are crap !!!.....

Yokesc5

05 Wreck

Until your elbow clicks.(Or 11 ft lbs)

Dano523

To add, don't spin the plugs out , or torque them back in, until the heads are bone cold room temp.

If the heads are still hot from running the motor, lets the heads cool down to room temp again before working on the spark plugs.

This will prevent you from stripping a spark plug channel threads as you go to remove the plugs, then torque the new ones in.

HOXXOH

I've had (until one was stolen) 2 beam style 1/2" drive 150# torque wrenches that were certified to be within 2%. They check(ed) almost exactly the same as the 1/2" drive one I have from HF. Since I retired, I've had no need for annual aerospace certifications of measuring equipment, but I do my own checks anyway. As much as people tend to assume that HF tools are junk because they cost less than Snap-on or Matco, I can confirm my HF torque wrenches are all within the 4% they claim.
BTW, at age 76 I'm fairly confident my measuring tools will outlast me. The car? Well I doubt it.

demon340

Dano523

Ditto as well, and even go a touch farther, to calibrate my HF wrenches against my know in-spec snap on torque wrenches as well.

Hence just set my snap-on to the spec that I am going to use, vise it up, put a socket on my HF that will fit the Hex head on snap on to the same setting, and make sure both of them click at the same time when set to the same torque settings.


Is anyone finds that their HF is way out of spec, can do a write up on how to adjust it to get it click at the correct settings.

windyC6

This has absolutely nothing to do with the accuracy of any tool. This has to do with certain tools that have a very good chance of falling apart while they are under the typical stress of normal use. For every story I hear about a HF tool being great, I could tell one where they fell apart quicker than a cheap muffin....

449er

Lol, Some of the Harbor Freight stuff is ok, but NOT a precision instrument like a torque wrench

windyC6

Exactly. Oh i'll buy a pry bar, or a hammer from the Freight, but won't buy anything that has moving parts unless I absolutely have to as in no other quality tool is available from somewhere else and I need it in a hurry.