when to change plugs

[pastor scott.com]

I always changed my plugs everyt 10,000, but my new burb says 100,000. what do you guys do ? Im afraid that after 100,000 those plugs wont come out

 

 

Scott

[Ben]

Picture is of some new platinums for my dads Caddy STS.

Modified and better than indexing.

 

Also shows the plain jane Delco plugs with the same mod

and the platinums out of my Suburban after about 50K miles

on them. Second set and the first set went approx 80K miles

and had most all o fthe ground hockey pucks gone.

 

I'm going to be changing the plugs on my Suburban every 30K

or so miles and regular plugs, not platinums. Why pay more for

a 100K mile plug when they don't last that long????

 

All of my engine run better (scream) with this modification.

Buddies who have tried also report better running.

 

[Ben]

ops, double posted

[az'03Silverado]

They'll last longer than 10,000mi but I wouldn't leave them until 100,000. Try taking them out every 30,000 to 50,000 to inspect. If they look cruddy, change them out. When you re-install (or when you install the new ones) just use anti-seize and they'll be fine. But, I agree, don't just leave them until 100,000mi or your mpg will suck (worse than it probably already does).

[PELICAN]

I changed mine at around 97,000 and they did not look bad. I installed the irridiums but I think I will check them out around 60,000 miles and see how they look.

[alvocado]

They'll last longer than 10,000mi but I wouldn't leave them until 100,000.  Try taking them out every 30,000 to 50,000 to inspect.  If they look cruddy, change them out.  When you re-install (or when you install the new ones) just use anti-seize and they'll be fine.  But, I agree, don't just leave them until 100,000mi or your mpg will suck (worse than it probably already does).

 

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Probably a stupid question but can you use any anti-seize on the spark plug threads?

[Bish]

They'll last longer than 10,000mi but I wouldn't leave them until 100,000.  Try taking them out every 30,000 to 50,000 to inspect.  If they look cruddy, change them out.  When you re-install (or when you install the new ones) just use anti-seize and they'll be fine.  But, I agree, don't just leave them until 100,000mi or your mpg will suck (worse than it probably already does).

 

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Probably a stupid question but can you use any anti-seize on the spark plug threads?

 

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I would HIGHLY recommend it especially if you plan on leaving them in for 100K

 

I run straight copper NGK TR-55's and change them every 30K. Less than $2 each and I think it idles a little smoother with the copper.

[RyanZ71]

50,000 is the MAX I would go with the Plats or Iridiums. 30,000 is the max I would go with the standard plugs. As it stands right now, I have AC/Delco Rapidfires in my truck which means they get changed every 25,000-30,000

 

[97whitez71]

I did a complete service at 100,000 on my '97. Plugs, wires, cap, rotor, etc. After putting all the new stuff in, I didn't notice any difference in performance, idling, etc. I felt like my old stuff was still working pretty well or I would have noticed a difference with the new. I probably just got lucky with mine lasting that long. I definitly wouldn't change every 10,000 but would probably at least check them like others have said, around 50,000 to 60,000. Just wanted to share my experience.

[gmcjoe]

The first time I changed the plugs in my 2000 5.3l GMC was 80K. They were burnt to a crisp. I've used NGK TR55 plugs since and they look great

[Megaleprechaun]

I did a complete service at 100,000 on my '97.  Plugs, wires, cap, rotor, etc.  After putting all the new stuff in, I didn't notice any difference in performance, idling, etc.  I felt like my old stuff was still working pretty well or I would have noticed a difference with the new.  I probably just got lucky with mine lasting that long.  I definitly wouldn't change every 10,000 but would probably at least check them like others have said, around 50,000 to 60,000.  Just wanted to share my experience.

 

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Yeah, i just changed my plug at 135000 miles for the first time. i wasnt experiencing any running problems, i just felt that it needed to be done. The old plugs were worn pretty badly though. had worn in about a .70 or .80 gap and the diodes were worn nearly flush with the base of the plug. Replaced with autolite 605's and still runs great.

[fossil]

I'd change at 60000K especially if you got the aluminum head. Last thing you want is to have it seize in and then take the threads in the head along with it when you try to take them out.

[tnord]

I'd change at 60000K especially if you got the aluminum head. Last thing you want is to have it seize in and then take the threads in the head along with it when you try to take them out.

 

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that actually happened to me at 95k on my 5.3, just ran a tap in there quick and it was alright though.

[glntom]

I changed my wife's savana's plugs at 150,000. It was still running well, and is a serious PITA to change so I waited until I had reason to pull the "dog house" for other reasons. Milage went up 0.25mpg with the new plugs

[pm26]

I would change them at 60k miles. If you keep them longer, the electrodes will wear enough for the gap to increase substantially. This places a greater demand on the coils and the rest of the ignition system.

 

Incidentally, what is the cost of one ignition coil for an '06 5.3?