Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

Spark plug wear

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
Post Reply
flybobbie
Lifer
Lifer
Posts: 4015
Joined: Sat May 25, 2013 8:27 pm
Location: Stourbridge

Spark plug wear

Post by flybobbie » Sun Jan 07, 2018 9:09 pm

Replaced spark plugs on my 23i.
Single electrode with a platinum fine wire in the centre.
40k since last fitted and the fine wire has all but gone.
Will try post picture.
Image
Thought might give some idea how long they last.
Wasn't giving any problems, but seems to run very slightly better since change.
Certainly last longer than the days of leaded petrol.
Attachments
plug.jpg
plug.jpg (75.89 KiB) Viewed 526 times

mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Spark plug wear

Post by mcbutler » Sun Jan 07, 2018 9:45 pm

Well yeah, of course it runs better with new plugs :poke:
Mark
Plymouth
E89
35i
Carmine Red
Black leather

mcbutler
Senior Member
Senior Member
Posts: 2551
Joined: Fri May 26, 2017 3:40 pm
Location: Plymouth

Spark plug wear

Post by mcbutler » Sun Jan 07, 2018 9:45 pm

mcbutler wrote: Sun Jan 07, 2018 9:45 pmWell yeah, of course it runs better with new plugs :poke:
Do you use super unleaded or regular, just out of interest??
Mark
Plymouth
E89
35i
Carmine Red
Black leather

User avatar
Smartbear
Lifer
Lifer
Posts: 13685
Joined: Wed Feb 05, 2014 6:54 pm
Location: a barn in Somerset

Spark plug wear

Post by Smartbear » Sun Jan 07, 2018 10:52 pm

flybobbie wrote: Sun Jan 07, 2018 9:09 pmReplaced spark plugs on my 23i.
Single electrode with a platinum fine wire in the centre.
40k since last fitted and the fine wire has all but gone.
Will try post picture.
Image
Thought might give some idea how long they last.
Wasn't giving any problems, but seems to run very slightly better since change.
Certainly last longer than the days of leaded petrol.
I don’t know wether it’s an optical illusion but they don’t look the same? The ceramic insulator seems to be at a different height :?
Rob
Image

e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

flybobbie
Lifer
Lifer
Posts: 4015
Joined: Sat May 25, 2013 8:27 pm
Location: Stourbridge

Spark plug wear

Post by flybobbie » Sun Jan 07, 2018 11:28 pm

They are both the same, one is resting at a slight different angle. I noticed that later when i looked at picture.
Having said that i now notice the lower diameter of the electrode can be seen. Did save one old plug will check to see if it's the same as the right one.

Well it is different. The left is NGK R5 BMW the right a Bosch 0 242 236 510 with shorter ceramic.

Mix of unleaded and super.
mcbutler wrote: Sun Jan 07, 2018 9:45 pmWell yeah, of course it runs better with new plugs :poke:
But it might have made no difference thou.
I think when cold and initial pull away it doesn't judder any more.

Post Reply