How Old Are these Spark Plugs?

[hkollie1]

Just finished replacing the plugs on my V8 with 174,000 miles...

I paid to have them replaced at the first 90,000 sevice...
They all look good to me, light toasty tan.

Question...Do you think they only have 90,000 miles on them?
...each of the plugs has a "welding or arc" build up of silver metal on both sides of the contact. One even had a double on the top...these are visible "bumps" hanging down, slightly reducing the gap i would presume.

Engine was running fine, no complaints. Haven't test driven it yet.

Also i had 2 NGK;s and 6 DENSO's...isnt that suspicious? I have heard of 4 and 4 or 3 and 3 on the V6's...hmmm maybe the dealer only did the 6 easy ones??

Hoping one of the regular 4Runner wrenchers has some input

 

[LTDSC]

seems about how mine looked after 90k. The different plugs could just have been what the dealer had in stock. 4 from one box, 2 from the other.

 

[gshadow325]

Sounds like you have a v8. I did my v8 and it was easy. Matter of fact one if the easiest v8s i ever did. It looks about right. The tip is worn out. You can mix the plugs as long as they the same temp rating and similar. You didn't notice it in the last 90k this like this makes me feel better about doing my own work. Heck if I am going to pay someone to mess up my vehicle, might as well be me and I can save the money haha