Thanks in advance; what can you read from the appearance of these spark plugs I just pulled from an 80? Normal?
What story are these plugs trying to tell?
- Thread starter Adventure208
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
Look clean and normal to me. Electrodes look worn based with the corners looking soft and not hard edges like they are when new so replacement seems appropriate.
I'm not sure if the gunk on the rim of the topmost is indicative of anything but if it's pretty soft and easy to wipe off it could have been picked up from inside the spark plug tube and may mean that you have a leaking seal on the corresponding spark plug tube seal that lives in the valve cover. If that gunk is baked on and hard to remove then it more likely came from operating conditions in that cylinder and there may be a source of oil leaking into that cylinder (valve stem seals?, oil rings?).
I'm not sure if the gunk on the rim of the topmost is indicative of anything but if it's pretty soft and easy to wipe off it could have been picked up from inside the spark plug tube and may mean that you have a leaking seal on the corresponding spark plug tube seal that lives in the valve cover. If that gunk is baked on and hard to remove then it more likely came from operating conditions in that cylinder and there may be a source of oil leaking into that cylinder (valve stem seals?, oil rings?).
They look fine, but those are basic copper "v-power" plugs. If you want to replace them my personal preference on the 1FZ is the Denso IK16-5303. Very clean burning spark plug and lasts much longer than the copper plugs you have there.
