2003silvercorvette

well as the title says i need to know the torque specs for the spark plugs on our cars, thanks

ErnieN85

New 20nm
subsequent 15 NM
pretty low! also done with engine cold

Patches

Or 15 lb. ft. when heads are new and 11 l. ft. from then on.

RPOZ4Z

also make sure you use antiseize compound on the plug threads.

66427-450

now days, synthetic oil is recommended (over antiseize).... then torque to 10-11#

ErnieN85

So Who has a torque wrench that goes this low?
mine quits reading at 20 lbs
(3/8 drive craftsman)

Dan_the_C5_Man

Exactly.. Tq wrenches are for cylinder head, rod and crank cap bolts, and larger suspension fasteners..

Just use anti-seize and snug 'em down nice and tight, don't lean on the wrench too much.

2KFRC5

I have 2, a Husky 3/8", and a Craftsman 3/8", and both go down to 10FtLbs on the shaft.

http://www.sears.com/sr/javasr/produ...44563000&cs=e1

Dan_the_C5_Man

The only time I've ever stripped a bolt (10mm case bolt on a bike motor) was using a Tq wrench.. Live and learn. I'll always trust my human touch over a Tq wrench at these low values.. Just my 2.5 cents.

larrysb

I have torque wrenches that go down to inch-lbs. Common for working on aluminum, particularly aircraft. But getting to be more common on cars with all the aluminum and lightweight alloys, magnesium and so on. It's more important for the light stuff to be torqued accurately. When a torque spec is 15 in-lbs, the line between too loose and too tight is very critical.

Steve-H

torque them using a 3/8 ratchet holding it as close to the head as you can.

BlownV6

People torque down spark plugs?

03LingenfelterC5

here is a .pdf that has it all, including the plugs:

http://davidfarmerracing.com/C5torque.PDF

save it in your favorites folder...right?