101,000 miles on spark plugs
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Chrysler uses NGK plugs, fine wire Iridiums to be exact, in ALL 6.1 liter engines.
Get your info correct before posting it as fact.
And we have run +4's in a dozen different vehicles here. Neon, Sunfire, Horizon, GMC trucks, Built up Chevies, etc.
Never a problem. Worked just fine for a LOOOOOONG time.
Get your info correct before posting it as fact.
And we have run +4's in a dozen different vehicles here. Neon, Sunfire, Horizon, GMC trucks, Built up Chevies, etc.
Never a problem. Worked just fine for a LOOOOOONG time.
We won't use Bosch plugs in the shop anymore.
They are iffy - now or later you will get misfires and anomalies.
If the car is designed for them, and came with them, it is a different story.
This is not myth or lore - it is a fact that most mechanics are aware of.
It is not worth taking a chance.
Those spark plugs pictured above are in outstanding shape for 100+k miles. Since you are not sure, I think they were replaced - they are just too good.
Check the resistance from the tip to the center electrode on your new ones. A drop may have cracked the internal resistor.
And like mentioned, it is perfectly safe to carefully check and adjust the gap, if necessary.
They are iffy - now or later you will get misfires and anomalies.
If the car is designed for them, and came with them, it is a different story.
This is not myth or lore - it is a fact that most mechanics are aware of.
It is not worth taking a chance.
Those spark plugs pictured above are in outstanding shape for 100+k miles. Since you are not sure, I think they were replaced - they are just too good.
Check the resistance from the tip to the center electrode on your new ones. A drop may have cracked the internal resistor.
And like mentioned, it is perfectly safe to carefully check and adjust the gap, if necessary.
Bosch plats didnt work in a few apps that I tried - they would absolutely NOT work on a COP denso coil - thise need iR to keep from toasting the coil. I like Bosch coppers though and champs and denso - they all have their apps where they run great. Any stray from factory exept on a very stong coilystem cn be an iffy proposition. The single bosh plts tend to quench the spark due to the proximity of the nose insulator to the firing tip.
Originally Posted By: Vizzy
Contrary to the "internet lore" (probably a stealth marketing program by a competitor) Bosch plugs are excellent . I've used copper, silver, and +2 and +4, and they are performed flawlessly over 60k miles on each set..
I'd by Bosch plugs again in a heartbeat. As a matter of fact that is all I've ever used in my cars .
I've lived the "lore." Bosch platinum plugs work great in a few applications, but are a disaster in most others. The fine center electrode set flush with the ceramic insulator is a recipe for disaster. Its just a very marginal design compared to later platinum plugs from other manufacturers which use a bigger platinum conductor and protrude it above the ceramic just like copper electrodes are done. Much less prone to fouling than the Bosch design.
Contrary to the "internet lore" (probably a stealth marketing program by a competitor) Bosch plugs are excellent . I've used copper, silver, and +2 and +4, and they are performed flawlessly over 60k miles on each set..
I'd by Bosch plugs again in a heartbeat. As a matter of fact that is all I've ever used in my cars .
I've lived the "lore." Bosch platinum plugs work great in a few applications, but are a disaster in most others. The fine center electrode set flush with the ceramic insulator is a recipe for disaster. Its just a very marginal design compared to later platinum plugs from other manufacturers which use a bigger platinum conductor and protrude it above the ceramic just like copper electrodes are done. Much less prone to fouling than the Bosch design.
440 Right.
And who else uses the flush design? No one?
Is this a clue?
And who else uses the flush design? No one?
Is this a clue?
Yep 400, nice summary; mechtech2 is on point:
Anyone who has studied plugs and tried tuning with differing designs brands on one engine family knows that extra electrodes quench the flame kernel(on non-indexed apps as most all PCMO are); the insulator nose is relatively COLD at light throttle cruise and can quench the kernel if proximal to it. Now if the heat range selection or plug torque/gasketing is incorrect, the ceramic nose will glow orange and you'll get preignition. Bosch platinum is promoting a design with way too many pitfalls, I have never had these plugs run better overall than something else (Denso, Champ, Autolite, Bosch Copper, NGK Ir) though I could tune for WOT racing with them and they were robust, but never worked "great" or "dang Good" on a Lamda-controlled PCMO.
Anyone who has studied plugs and tried tuning with differing designs brands on one engine family knows that extra electrodes quench the flame kernel(on non-indexed apps as most all PCMO are); the insulator nose is relatively COLD at light throttle cruise and can quench the kernel if proximal to it. Now if the heat range selection or plug torque/gasketing is incorrect, the ceramic nose will glow orange and you'll get preignition. Bosch platinum is promoting a design with way too many pitfalls, I have never had these plugs run better overall than something else (Denso, Champ, Autolite, Bosch Copper, NGK Ir) though I could tune for WOT racing with them and they were robust, but never worked "great" or "dang Good" on a Lamda-controlled PCMO.
I changed the original AC plugs in my 03 Bonneville 3.8 NA at 150K miles. They looked just like the ones in your pic. I researched all of the double, triple, voodoo, etc plugs, but when one gets 150K out of a set with nary a misfire, it seemed foolish to not replace them with the OE plugs. I did. I'll change them at 250K this time, though. I would have changed them sooner, but the MPG never changed and had no symptoms of bad plugs.
Newer AC Delco are now made by NGK.
Hmmmm, completely flush center electrode....
Might want to check that one out.
Hmmmm, completely flush center electrode....
Might want to check that one out.
The Bosch platinum plugs I took out of my i30 after 40k miles of service (prior service had been done by previous owner) had the 'flush' center electrodes, but they weren't flush, the electrodes had worn/receded into the ceramic. Didn't look good for sparking, though they all looked perfect otherwise.
I replaced them with NGK v-power copper plugs. The occasional miss at idle in gear went away. By occasional I mean sitting in gear idling at a traffic light it felt like one cylinder would miss every few seconds.
To OP, those plugs aren't pretty but look great for 100k of service. The double platinum tips did their job.
I replaced them with NGK v-power copper plugs. The occasional miss at idle in gear went away. By occasional I mean sitting in gear idling at a traffic light it felt like one cylinder would miss every few seconds.
To OP, those plugs aren't pretty but look great for 100k of service. The double platinum tips did their job.
No running problems?
We have a 190E that had running problems, and we finally pulled the plugs, and found pits where the electrodes should've been. I'd say you're doing fine, but it doesn't hurt to check the gap.
Here's what they looked like. if you look close, you can see the lack of electrode.
We have a 190E that had running problems, and we finally pulled the plugs, and found pits where the electrodes should've been. I'd say you're doing fine, but it doesn't hurt to check the gap.
Here's what they looked like. if you look close, you can see the lack of electrode.
I never let any of my plugs go longer than 40K miles. They are cheap and easy to change. Why risk seized threads and poor economy/performance just to save a few bucks? lol
Originally Posted By: SteveSRT8
Chrysler uses NGK plugs, fine wire Iridiums to be exact, in ALL 6.1 liter engines.
Get your info correct before posting it as fact.
And we have run +4's in a dozen different vehicles here. Neon, Sunfire, Horizon, GMC trucks, Built up Chevies, etc.
Never a problem. Worked just fine for a LOOOOOONG time.
That engine is the exception for sure. You will find Champions as the factory plugs on many, many Chrysler and Jeep engines.
Chrysler uses NGK plugs, fine wire Iridiums to be exact, in ALL 6.1 liter engines.
Get your info correct before posting it as fact.
And we have run +4's in a dozen different vehicles here. Neon, Sunfire, Horizon, GMC trucks, Built up Chevies, etc.
Never a problem. Worked just fine for a LOOOOOONG time.
That engine is the exception for sure. You will find Champions as the factory plugs on many, many Chrysler and Jeep engines.
A quick look across the LX platforms shows that the 2.7 and 3.5 also use fancy schmancy platinums.
Only the 5.7 uses Champ Coppers. Admittedly that's one of their highest volume production motors for sure, running in Jeeps, Durangos, 300's, Chargers, Magnums, etc.
I'm sure this makes Champs the champ!
Only the 5.7 uses Champ Coppers. Admittedly that's one of their highest volume production motors for sure, running in Jeeps, Durangos, 300's, Chargers, Magnums, etc.
I'm sure this makes Champs the champ!
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