Could someone please read my spark plugs?

[99Saturn]

2006 Cobalt with 117,000. Don't know how long the plugs have been in - I am assuming original.

Left to Right 1-2-3-4

1-2 Close Up

3-4 Close Up

 

[Quest]

looks really good.

Action plan:

(1) check gap.
(2) get a small wire brush, brush off all the rusty/carbon debris off the treads.
(3) reuse them (make sure you torque them down properly)

Q.

 

[4wheeldog]

They look like plugs out of a pedestrian, good running engine. Fuel injection and electronic ignition have done wonders for spark plug and internal engine condition.

For what it worth, I have not seen a plug that has come out of a modern EFI engine that I would not have condemned for an overlean condition, back in the bad old days of carbs and distributors.

 

[turtlevette]

wouldn't the blackness mean the plug is a little cold? The tip should look like the bend. Grayish to reddish brown.

 

[SHOZ]

Proper temperature plugs has the color change at the bend of the electrode. Those plugs look great. I took some 100k miles OEM plugs out of my sons Malibu 4 cly last summer and they looked good as new almost.

 

[Trav]

They look great. I would use the same plugs to replace them. No point in putting them back in with 117K just replace them.

 

[splinter]

They and the combustion chamber they're screwed into sure look from here to be in pretty good condition.

So many variables it's always a bit of an educated guess but I prefer eyeballing the entire length of the center electrode porcelain really see what's going on in there.

TMI here...http://brianesser.com/technical-information/the-ultimate-guide-to-spark-plugs/

 

[toneydoc]

Those look GREAT. I would buy more of the same, gap them and use them.

 

[AKhan87]

keep them, hands down.

 

[99Saturn]

Thanks all, now I feel a bit dumb for stressing over getting to this for the last few months. I'll clean them up and put them on the shelf as a spare set.

 

[Lubener]

Check this site out. Very informative on "reading" spark plugs.
http://www.autorepairinstructions.com/?cat=9