I was just changing my 3rd spark plug on the driver's side, and noticed when I was taking it out it kind of would get slightly harder to turn and then easier and so on.

When I went to install the new one, it did the same thing when I was screwing it in. Is this normal, or could something be wrong with my head? The truck only has 13,000 miles on it. I figured it was just corrosion, and maybe a little WD-40 or something would help.

Any help is appreciated. Thanks.

 

Be very cautious as these are aluminum heads and cross threading is very easy to do. I would monitor that plug periodically as to tightness, as these motors are known to launch plugs.

 

A little bit of Anti-Sieze never hurt anyone either. It helps prevent any galling from occurring. I always use Anti-Sieze on my plugs, it also helps with removal. A little dab will do ya!

 

offraod,

Were you using a U joint for that plug?
That will cause what you describe if it is not straight. What did the threads on the plug look like? Were they dirty?

Regards

Jean Marc Chartier