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#4473836 - 07/29/17 11:25 AM Spark plugs
Lignums Offline


Registered: 11/25/16
Posts: 21
Loc: Ohio
I have a 2004 Buick Lesabre 3.8 with 178,000 miles on it. I changed the plugs last night, as it was running a little rough under load going uphill or getting on the highway. I also changed out the fuel filter, which wasnt clogged all the way, but could hardly blow through it. Since those two things were changed it runs great.

When I pulled the plugs out I noticed some discoloration that I have never seen before. Was wondering if any of you guys have seen plugs like these.













_________________________
1998 Chevy w/t 1500 4.3
2004 Buick Lesabre 3.8
2006 Gmc envoy xl 5.3

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#4473849 - 07/29/17 11:55 AM Re: Spark plugs [Re: Lignums]
Whimsey Offline


Registered: 12/22/02
Posts: 4049
Loc: The Garden State
If those plugs were in for the full 178,000 miles they did great. The color looks maybe a little lean and it looks like the platinum tip wore down, not surprised though. You got your money's worth out of them grin.

Whimsey

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#4473853 - 07/29/17 12:04 PM Re: Spark plugs [Re: Lignums]
blupupher Offline


Registered: 08/27/04
Posts: 4423
Loc: Katy, Republic of Texas
Yeah, how many miles are actually on the plugs?
As for color, no idea aside from looking online at plug charts.
_________________________
1994 Honda VT1100C: Peak 15w-40/TG/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI


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#4473858 - 07/29/17 12:12 PM Re: Spark plugs [Re: Lignums]
FermeLaPorte Offline


Registered: 07/25/17
Posts: 472
Loc: Texas (south)
Are they the original oneS?
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Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.

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#4473859 - 07/29/17 12:12 PM Re: Spark plugs [Re: blupupher]
Lignums Offline


Registered: 11/25/16
Posts: 21
Loc: Ohio
10,000 miles. We bought it used as a training vehicle for my son who will turn 16 in November. I hate to assume anything, but I am assuming with the fuel filter being clogged, it was running in a lean condition off and on, and was probably running like that for a while. I changed the plugs when I bought the car last year.
_________________________
1998 Chevy w/t 1500 4.3
2004 Buick Lesabre 3.8
2006 Gmc envoy xl 5.3

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#4473863 - 07/29/17 12:19 PM Re: Spark plugs [Re: Lignums]
Delta Offline


Registered: 04/20/14
Posts: 1150
Loc: South Central PA
6th picture down almost looks like the porcelain has cracked.
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#4473864 - 07/29/17 12:20 PM Re: Spark plugs [Re: Delta]
Lignums Offline


Registered: 11/25/16
Posts: 21
Loc: Ohio
Originally Posted By: Delta
6th picture down almost looks like the porcelain has cracked.



I noticed that too.
_________________________
1998 Chevy w/t 1500 4.3
2004 Buick Lesabre 3.8
2006 Gmc envoy xl 5.3

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#4473877 - 07/29/17 12:36 PM Re: Spark plugs [Re: Lignums]
NibbanaBanana Offline


Registered: 05/23/16
Posts: 292
Loc: New England
I would have said a couple of them look a little on the rich side. None of them really look lean to me.
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1993 Ford E350 5.8L, 68K
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2013 Kia Reo 1.4L, 101K
7500 OCI, M1 5-30 winter, M1 10-30 summer

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#4473886 - 07/29/17 12:50 PM Re: Spark plugs [Re: Lignums]
SoNic67 Offline


Registered: 06/06/15
Posts: 66
Loc: VA, US
The white porcelain means that they where running hot. Maybe the wrong temperature range... maybe something else like running lean (that would increase the temperature).

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#4473887 - 07/29/17 12:53 PM Re: Spark plugs [Re: Lignums]
bubbatime Offline


Registered: 03/18/08
Posts: 5627
Loc: South Florida
Those look pretty bad for 10K miles.

One of the plugs look like it has a lot more oil burn than the others, so that cylinder probably has bad oil rings or oil seal.

That being said, its a beater for your son. As long as it runs ok, I would just run it as is until you trade it in.

Thats a good car for a 16 year old. Has a big back seat shocked
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#4473915 - 07/29/17 01:49 PM Re: Spark plugs [Re: bubbatime]
Surestick Offline


Registered: 09/10/08
Posts: 204
Loc: Cold Lake, Alberta, Canada
Originally Posted By: bubbatime


One of the plugs look like it has a lot more oil burn than the others, so that cylinder probably has bad oil rings or oil seal.



That cylinder could be the one that gets most of what the PCV puts out which will include some oil.

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#4473925 - 07/29/17 02:05 PM Re: Spark plugs [Re: SoNic67]
Lignums Offline


Registered: 11/25/16
Posts: 21
Loc: Ohio
Originally Posted By: SoNic67
The white porcelain means that they where running hot. Maybe the wrong temperature range... maybe something else like running lean (that would increase the temperature).




I have been looking for information as to what heat range that year of 3.8 takes but have been unsuccessful finding anything. The ngk plugs I just bought have a heat range of 5 the description.
_________________________
1998 Chevy w/t 1500 4.3
2004 Buick Lesabre 3.8
2006 Gmc envoy xl 5.3

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#4473961 - 07/29/17 02:51 PM Re: Spark plugs [Re: Lignums]
Eddie Offline


Registered: 12/07/03
Posts: 9569
Loc: Florida, Cape Coral
They look decent to me and show no or little evidence of problems. Replace plugs and enjoy. No sense over-thinking this. Ed
_________________________
CX5 Touring 2.5L :-)

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#4473978 - 07/29/17 03:32 PM Re: Spark plugs [Re: Eddie]
Lignums Offline


Registered: 11/25/16
Posts: 21
Loc: Ohio
Originally Posted By: Eddie
They look decent to me and show no or little evidence of problems. Replace plugs and enjoy. No sense over-thinking this. Ed



That is my thinking, I was seeing what you guys thought is all.
_________________________
1998 Chevy w/t 1500 4.3
2004 Buick Lesabre 3.8
2006 Gmc envoy xl 5.3

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#4474079 - 07/29/17 06:38 PM Re: Spark plugs [Re: Lignums]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 6175
Loc: USA
For a traverse V6 engine where the rear plugs can be impossible to access, I like to use iridium ones that last over 100k, so you don't have to go back there again.

NGK Laser iridium or Denso Long-Life or TT

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