When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Swapped the spark plugs because I don’t know when last they were done. They’re pretty dirty. It’s almost like the gases got past the threads. Some of them have black on the outside.
Yup, certainly looks as those weren't torqued properly at one time or another.
They will loosen if not torqued to spec. I do mine to 22 ft/lb, but the spec is for 20 ft/lb.
