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View Full Version : Spark plug analysis, please.



ForesterES
09-26-2009, 10:24 PM
I just changed the plugs on my car, and I'd like you all to give them a quick visual analysis. They look OK to me based on the pictures I have seen on teh intartoobz, except for the insulators from cylinders 2 and 3.

The car is a '02 Pro with a 2.0L engine that just turned 110,000 miles. The plugs themselves have about 60K on them. The plugs are arranged left-to-right, cyl. 1-2-3-4.

http://img.photobucket.com/albums/v65/g8rforester/DSC_0039.jpg
http://img.photobucket.com/albums/v65/g8rforester/DSC_0040.jpg
http://img.photobucket.com/albums/v65/g8rforester/DSC_0041.jpg
http://img.photobucket.com/albums/v65/g8rforester/DSC_0042.jpg

This is the only one I have a big question about, cylinder 3. Brownish discoloration on the insulator, and a film of oil on the nut and washer. When I shined a light down the plug hole, there was a film of oil at the bottom. Not a lot of oil, just enough to make the bottom of the hole brown. The car does not burn oil at an alarming rate, probably 1 quart every 10000 miles.
http://img.photobucket.com/albums/v65/g8rforester/DSC_0047.jpg
http://img.photobucket.com/albums/v65/g8rforester/DSC_0049.jpg

concept
09-28-2009, 10:15 AM
http://www.sparkplugs.com/sparkplug411.asp?kw=Corona+Stain&mfid=0

I'd say, based upon the above-link, that you're okay.

ghostbusters
10-01-2009, 10:40 PM
if u dont like the oil on the nut, then just remove the valve cover and change the plug seals,