Do I have to have a torque wrench for spark plugs?
 

Hello. all. I was just wondering if I have to use a torque wrench when installing new spark plugs. Also when checking for proper gap, I have a coin shaped tool. Is this okay to use?




Thanks,

Chris

The purpose of using a torque wrench is to not under tighten or over tighten the plugs. If you have a good feel for doing this, then you don't need a torque wrench. If you do not have a good feel for this, then you may strip out the threads or not tighten the plug enough. You are the only person who can assess your feel for tightening spark plugs.

I tighten my plugs by feel, but if I were you I'd use a torque wrench to be safe.

Good luck!

You mean something like this? If so, it will be fine.

http://www.aircraftspruce.com/catalo...s/12-21375.jpg

As far as tightening the plugs, much discussion on technique.

I do not use a torque wrench. I hand tighten them into position until I feel the compression gasket start to compress, and then give it another 1/4 turn.

Thanks for the replies everyone. I have changed plugs before on the Karmann Ghia I used to own and did it by feel. I basically hand tightened them and them gave them a little turn after that. I'll give it a shot.


Thanks,

Chris

I use a torque wrence on aircraft but they don't have crush washers. you can feel the washer contact the head and feel it start to crush, yeah about a 1/4 turn. But don't over tighten, the torque will increase sharply. If it does, take it out and start with a new washer. Be carfull.

I started using a torque wrench some years ago, and I haven't had a plug break off since.

Best,
Tom

no torque wrench, but a real gap gauge would work better ..........

no torque wrench, I have same gap tool. so far so good.

I've been working on my own cars for more than 25 years.

I always use a torque wrench...

This is what you need for a 911. But to start with just get a 5 to 75 foot pound wrench. (mid size with black head)
The big one is for gearbox and suspension work. Also great for torqueing lug nuts.
The smaller chrome wrench is a "Torqometer"... I last used it to check differential bearing pre load.
Can also be used for Phillips heads screws into plastic and plastic oil filter holders for a VW and modern water cooled 911 engines.
Also good for any task requiring light but accurate torque. (Home made tomato paste lids)

Mine are "Snapon" because I prefer American made tools.
But you don't to buy the same. Any good quality wrench is fine.

Always return it to zero and store it properly. Don't use it as a breaker bar.
And you should get it checked for accuracy regularly.
Once a year from a pro mechanic.... Every 3 years for an amateur home mechanic.
I have seen home made weight bars used to check torque wrenches.

http://forums.pelicanparts.com/uploa...1267414828.jpg