[cruze01]

I know this has been mentioned before but it's worth saying again, if you haven't checked your spark plugs for a while I recommend you go do it now! I just checked mine because I realized I had set them wrong the last time. It's been about 30K and all four of them were loose as could be! I mean finger loose! When I changed them before I torqued all four to 20flb. I think GM should put this in the manual as a routine maintenance item......

 

[jblackburn]

Never had mine come loose, but then I never used a torque wrench either. Hand tight + a little bit more by a wrench (nowhere near enough to strip) has always worked for me.

Keep in mind that the crush washer on plugs crushes - once - to seal. After that, you'll probably need a bit more torque to keep them snug in the head.

 

[obermd]

Once you pull them out and then put them back in they're more likely to come loose. The crush washer is what keeps them snug on the first installation.

 

[cruze01]

Never had mine come loose, but then I never used a torque wrench either. Hand tight + a little bit more by a wrench (nowhere near enough to strip) has always worked for me.

Keep in mind that the crush washer on plugs crushes - once - to seal. After that, you'll probably need a bit more torque to keep them snug in the head.

This set was new when I put them in 30k ago, the originals were loose when I went to take them out. I did give a little extra this time, 20 on the torque wrench and an extra push!