Worth renewing spark plugs?

S

speed12

Member
Evening all,

Well the Z4 didn't sell, had a few people interested but wanted rock bottom prices, and the only person offering full price was a scammer. So have decided to keep for the winter and sell next spring/ summer (oh what a shame.... :wink: )

So in less than two weeks I am taking the Z4 and my better half to Corsica via France, Belgium, Luxembourg, Germany, Switzerland and Italy. Last year she did a similar thing and averaged 37mpg. This year MPG is still reasonable however now that the car is around 8 years old and has done 43K I am thinking of renewing the spark plugs.

THis seems to be a much debated topic, do I leave as is (no real problems except for intermitteant missfire on start up), or do I spend £40 and get some new plugs, potentially improving MPG and smoothness?

I would probably be getting the NGK irdium plugs, though will need to buy a gap adjuster (special wire type not coin type), I can get 6 for around £35.

NGK and also BMW list the NGK BKR6EQUP as the OEM replacement, however on some sites it shows them with 4 electrodes, on others it shows them with just one?

Anyone got any experience on new plugs with a 3.0i? comments much appreciated.

Kind regards
 
speed12 said:
This year MPG is still reasonable however now that the car is around 8 years old and has done 43K I am thinking of renewing the spark plugs.

NGK and also BMW list the NGK BKR6EQUP as the OEM replacement
Click to expand...

good idea :thumbsup:

... 4 electrodes are correct.

regards,
Frank
 
Well worth it if they have been in for a long time, check the air filter as well.Mine ran like a new car after a Insp2 ( 49k miles).Even my missus noticed the difference.I rekon the plugs had been in for 4 years at least.
 
Trying to decide which plugs to get.

I hear BMW have moved away from the 4 pring Bosch plugs. Cant seem to find any of the equivalent NGK 4 prongs except for an american site. When I enter the part number I get the single prong platinums.. and for the price I may as well buy the single prong iridiums, trouble with them is re gapping them since it is very hard and brittle.
 
Well,

Just purchased 6 x NGK iridiums (6418 NGK part number), they list them as an upgrade from the standard platinum 4 prongs.

The gap is supposed to be pre set but I will check with some feeler gauges, general consensus on multiple websites is that for the M54 engine the gap should be 0.8mm (approx 0.032 inches).

Managed to get 6 for £32 including postage and packaging from ebay.
 
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