Haynes Manual Wrong????

[vamustangman]

Wanted to change my spark plugs on my 91 so I looked up the torque specs. and my haynes manual says toruqe the plugs 84 to 168 foot lbs. that sounds way to tight. Some of the other post say 12 to 15 foot lbs. which is correct ? Thanks.

 

[JDraper]

Wanted to change my spark plugs on my 91 so I looked up the torque specs. and my haynes manual says toruqe the plugs 84 to 168 foot lbs. that sounds way to tight. Some of the other post say 12 to 15 foot lbs. which is correct ? Thanks.

The Haynes manual says 84 to 168 in-lbs not ft-lbs. That's equivalent to 7 to 14 ft-lbs.....

 

[vamustangman]

oh good thing I asked that would have been a bad weekend thanks for the help.

 

[duff]

I've never torqed plugs. I just give them a good twist - not too tight. Use anti seize on the threads if you want to get them out next time. Mine were real dry and tight on my 91.

 

[marragtop]

I agree with the anti-seize suggestion. That's one of the most important things about changing plugs.

 

[vamustangman]

Going to have to give them a good twist anyway the darn torque wrench I got from summit years ago has a minimum of 25 ft-lbs. so I couldn't do the 7-12 lbs of torque even if I wanted to.

 

[BrooklynBay]

Besides using anti seize compound on the plugs, it's a good idea to use tune up grease on the spark plug boots.

 

[jimbo74]

if you have decent body strength, you can easily torque a bolt to 40 foot pounds.....

it isnt that much, i have tightened metro wheels before with just a ratchet, when i tossed the torque wrench ion them, it wouldnt even move at all before it clicked, meaning i had overtightened them by hand

 

[BrooklynBay]

Permatex makes tune up grease in small squeeze containers. It looks a lot like vaseline. I wouldn't be surprised if it really were vaseline in those tubes! A small tube cost over a dollar. I could buy a whole tub of vaseline in a dollar store.

 

[jimbo74]

that dielectric grease is not reuglar petroleum jelly

 

[BrooklynBay]

I'm sure that it probably has different ingredients to make it last at higher temperatures.

 

[jimbo74]

dielectric grease is not for that, it is for electrical connections..... it is not anti-seize, it is for the metal conductive contacts so they dont develop corrosion

 

[BrooklynBay]

What is that stuff inside of light bulb sockets on tail lights that looks like a thick grease?

 

[jimbo74]

What is that stuff inside of light bulb sockets on tail lights that looks like a thick grease?

that is dielectric grease, not vasaline