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Registered:
May 2002
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Spark Plug dramas
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Sat, 15 June 2002 12:45
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There has been a funny smell coming out of the exhaust so had a look at the spark plugs to see if it was running rich. Instead of a black carbon deposit, I find a strange rusty brown deposit. Mechanic tells me that the plugs are overheated. So I might try a colder plug.
The plugs were NGK Iridiums and had been used for about 15,000Km. I always thought Iridiums were long life but after some reading on the Denso website, only OEM Iridiums are long life. I assume this is somehow the same with NGK
Standard plugs - approximately 20,000km
Platinum plugs - approximately 80,000 - 100,000km
Iridium Power high performance plugs - approximately 15,000 - 20,000km
Iridium Original Equipment long-life plugs - approximately 150,000km
What is surprising is that the NGK Iridiums costed about $16.80 each!
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Location:
Newcastle
Registered:
May 2002
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Re: Spark Plug dramas
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Sat, 15 June 2002 12:56
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i hate to say it but a rusty brown colour sounds preety close to perfect
if they are black they are not cumbusting fuel properly ie a rich ratio and carbon deposits are forming if they are white there is too much heat ie lean. if you can look in the back of a haynes repair manual it gives a spark plug chart telling you what the colours mean
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I supported Toymods
Location:
Perth WA
Registered:
May 2002
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Re: Spark Plug dramas
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Sat, 15 June 2002 13:15
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Accoding to the NGK (Aust) website, they indicate irridium plugs can last (up to) 160,000kms!
They seem to say that their precious metal electrode plugs last quite a bit longer than standard.
http://www.ngkspark.com.au/products_spark_plug_ind ex.htm
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Location:
Wollongong
Registered:
May 2002
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Re: Spark Plug dramas
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Sat, 15 June 2002 14:20
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Plugs can go orange coloured due to fuel additives, or could even be normal. I pulled out my 100,000km NGK-R platinums and they were orange-ish in colour.
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