How many miles on these? 328i plugs

[OVERKILL]

Originally Posted By: ltslimjim
^I was thinking the same thing in my previous post...those things scream ANTI-SPARK KNOCK. lol

Observe:

Looking at that pic, I'm thinking these are pretty worn. The gap looks a LOT larger on the ones I pulled.

 

[meep]

I'll say 50,000 miles on them. the center electrode looks pretty worn, more than 30k but not horrid-bad either. May be the pic, but it looks like some wore more than others.

In general, nice, clean wear on them.

 

[ltslimjim]

Yeah, I'd agree with meep. Whatever the 'actual' mileage expected out of these, it's probably gone at least half over that expected mileage for the arms to be that worn back plus the electrode itself recessed.

On the bright side, there obviously isn't severe mechanical issues inside this engine to have still performed 'decent', albeit rather poorly, on the over-used plugs.

 

[OVERKILL]

Originally Posted By: tom slick
Originally Posted By: OVERK1LL
Originally Posted By: GMBoy
I always thought only Bosch made 4 prong plugs. Learn something new everyday..


I know eh? LOL!


NGK makes 1, 2, 3, and 4 ground plugs. The even make them with all 3 grounds connected with a triangle. The difference is that they are all for specific engines. The Bosch "+" series were marketed as a design for all engines.

I'd bet the plug design you pulled out are specific to your BMW.


Apparently all the newer BMW's come with this style of plug.

 

[OVERKILL]

Originally Posted By: ltslimjim
Yeah, I'd agree with meep. Whatever the 'actual' mileage expected out of these, it's probably gone at least half over that expected mileage for the arms to be that worn back plus the electrode itself recessed.

On the bright side, there obviously isn't severe mechanical issues inside this engine to have still performed 'decent', albeit rather poorly, on the over-used plugs.


Agreed, the engine appears to be quite healthy

 

[Vikas]

Sadly, even after replacing 140K plugs in multiple cars, I have never gotten any of that "new plugs" feeling.

I remember it used to me quite a difference with carburator and distributor e.g. 1983 Prelude.

- Vikas

 

[SteveSRT8]

Yep, these modern cars can just about make a spark off a pine log!

 

[mechtech2]

How do old or new plugs affect the car "holding a gear"?

 

[OVERKILL]

Originally Posted By: mechtech2
How do old or new plugs affect the car "holding a gear"?


They don't and I'm not sure how you extracted that from my post? I said it BUCKED while holding a gear, IE, it was MISFIRING under heavy load, low RPM. Changing the plugs got rid of the misfire.

 

[Vikas]

I had plugs worn so much that the gap had became more than doubled. Even then there was no misfire. Putting brand new spark plugs felt no difference. I am surprised that your NGK has already started misfiring; they don't look bad compared to new ones.

 

[SteveSRT8]

Same here, we have run OEM ACDelcos for well over a quarter million miles with no codes.

When changed, no perceptible difference.