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Spark plugs #4473836
07/29/17 11:25 AM
07/29/17 11:25 AM
Joined: Nov 2016
Posts: 22
Ohio
Lignums Offline OP
Lignums  Offline OP
Joined: Nov 2016
Posts: 22
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
Re: Spark plugs [Re: Lignums] #4473849
07/29/17 11:55 AM
07/29/17 11:55 AM
Joined: Dec 2002
Posts: 4,154
The Garden State
Whimsey Offline
Whimsey  Offline
Joined: Dec 2002
Posts: 4,154
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

Re: Spark plugs [Re: Lignums] #4473853
07/29/17 12:04 PM
07/29/17 12:04 PM
Joined: Aug 2004
Posts: 4,642
Katy, Republic of Texas
blupupher Offline
blupupher  Offline
Joined: Aug 2004
Posts: 4,642
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 VT1100: Peak 15w-40/PSL/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI

Re: Spark plugs [Re: Lignums] #4473858
07/29/17 12:12 PM
07/29/17 12:12 PM
Joined: Jul 2017
Posts: 542
Texas (south)
FermeLaPorte Offline
FermeLaPorte  Offline
Joined: Jul 2017
Posts: 542
Texas (south)
Are they the original oneS?


Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.
Re: Spark plugs [Re: blupupher] #4473859
07/29/17 12:12 PM
07/29/17 12:12 PM
Joined: Nov 2016
Posts: 22
Ohio
Lignums Offline OP
Lignums  Offline OP
Joined: Nov 2016
Posts: 22
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
Re: Spark plugs [Re: Lignums] #4473863
07/29/17 12:19 PM
07/29/17 12:19 PM
Joined: Apr 2014
Posts: 1,254
South Central PA
Delta Offline
Delta  Offline
Joined: Apr 2014
Posts: 1,254
South Central PA
6th picture down almost looks like the porcelain has cracked.


'17 VW GTI 2.0T - 6MT - 9K - Edge 0w40
'15 Camry SE - 2.5 - 20K - PP 0w20
'99 S10 - 2.2 5MT - 155K - T6 0w40
Re: Spark plugs [Re: Delta] #4473864
07/29/17 12:20 PM
07/29/17 12:20 PM
Joined: Nov 2016
Posts: 22
Ohio
Lignums Offline OP
Lignums  Offline OP
Joined: Nov 2016
Posts: 22
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
Re: Spark plugs [Re: Lignums] #4473877
07/29/17 12:36 PM
07/29/17 12:36 PM
Joined: May 2016
Posts: 293
New England
NibbanaBanana Offline
NibbanaBanana  Offline
Joined: May 2016
Posts: 293
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.


1993 Ford E350 5.8L, 68K
2002 Ford E150 4.2L, 85K
2006 Chevy Aveo 1.6L 215K
2013 Kia Reo 1.4L, 101K
7500 OCI, M1 5-30 winter, M1 10-30 summer
Re: Spark plugs [Re: Lignums] #4473886
07/29/17 12:50 PM
07/29/17 12:50 PM
Joined: Jun 2015
Posts: 66
VA, US
SoNic67 Offline
SoNic67  Offline
Joined: Jun 2015
Posts: 66
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).

Re: Spark plugs [Re: Lignums] #4473887
07/29/17 12:53 PM
07/29/17 12:53 PM
Joined: Mar 2008
Posts: 5,841
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,841
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


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30


Re: Spark plugs [Re: bubbatime] #4473915
07/29/17 01:49 PM
07/29/17 01:49 PM
Joined: Sep 2008
Posts: 211
Cold Lake, Alberta, Canada
Surestick Offline
Surestick  Offline
Joined: Sep 2008
Posts: 211
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.

Re: Spark plugs [Re: SoNic67] #4473925
07/29/17 02:05 PM
07/29/17 02:05 PM
Joined: Nov 2016
Posts: 22
Ohio
Lignums Offline OP
Lignums  Offline OP
Joined: Nov 2016
Posts: 22
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
Re: Spark plugs [Re: Lignums] #4473961
07/29/17 02:51 PM
07/29/17 02:51 PM
Joined: Dec 2003
Posts: 9,805
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,805
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 :-)
Re: Spark plugs [Re: Eddie] #4473978
07/29/17 03:32 PM
07/29/17 03:32 PM
Joined: Nov 2016
Posts: 22
Ohio
Lignums Offline OP
Lignums  Offline OP
Joined: Nov 2016
Posts: 22
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
Re: Spark plugs [Re: Lignums] #4474079
07/29/17 06:38 PM
07/29/17 06:38 PM
Joined: Mar 2008
Posts: 6,837
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,837
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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