Oils in plugs 1 and 3 wells (not from valve gasket) - Chevy Traverse Forum: Chevrolet Traverse Forum
 
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post #1 of 8 (permalink) Old 03-22-2017, 09:08 PM Thread Starter
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Oils in plugs 1 and 3 wells (not from valve gasket)

Hi,

2009- 137,000 - LS -FWD

previous history: two times ignition coils was replaced in 2014, replaced all plugs in 2014 when 100,000 and replaced all plugs again last month at 136,000

physical problem: oil in under plug 1 and 3 ( 1 is soaked ) others are cleaned. checked the valve cover gasket and no issue.

Any issue; felt misfire occasionally, and engine running unstable when going uphill. Some days no issue felt. P0420 come in and out

what might be an issue(s) and any options for fixing or diagnostic.


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post #2 of 8 (permalink) Old 03-23-2017, 10:13 AM
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Re: Oils in plugs 1 and 3 wells (not from valve gasket)

yours is a 2009...

but

Fluid in Spark Plug Tubes
March 25, 2013

A Check Engine light may be illuminated with misfire DTCs set, or a possible oil or coolant leak may be found, on some 2010-2013 Enclave, LaCrosse, CTS, SRX, Camaro, Equinox, Traverse, Acadia, Terrain; 2012-2013 Caprice PPV, Captiva, Impala; 2013 ATS and XTS models equipped with 3.0L and 3.6L (RPOs LF1, LFW, LLT, LFX) HFV6 engines. (Fig. 10)
On inspection, coolant or oil may be found in a spark plug tube. Determine if the oil or coolant is coming from the spark plug tube and not leaking into it from above. If the spark plug tube is leaking, replace the cylinder head, spark plug and coil.



Porous spots in the head created during manufacturing cause the leak. The spark plug tubes are permanently sealed into the head and are not replaceable.



If a cylinder head is replaced for this condition, mark the faulty spark plug tube before sending the head in for warranty or core so GM Engineering or the re-manufacturing facility can identify it.

2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.
2013 Equinox 3.6L - 60,000
2010 Traverse 3.6L- 127,000
2003 Trailblazer 4.2L- 180,000
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post #3 of 8 (permalink) Old 03-23-2017, 03:20 PM
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Re: Oils in plugs 1 and 3 wells (not from valve gasket)

Changed the plugs last August and found the same thing. Had both heads replaced under my service contract.






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post #4 of 8 (permalink) Old 03-23-2017, 03:32 PM
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Re: Oils in plugs 1 and 3 wells (not from valve gasket)

Pics worth a thousand words.
thanks RallyWgn.

What all 6 of mine looked like at 100,000




2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.
2013 Equinox 3.6L - 60,000
2010 Traverse 3.6L- 127,000
2003 Trailblazer 4.2L- 180,000
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post #5 of 8 (permalink) Old 03-23-2017, 06:43 PM Thread Starter
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Re: Oils in plugs 1 and 3 wells (not from valve gasket)

Thank You @RallyWgn and @rbarrios


@RallyWgn (what kind of driving experience do you have before replacing the heads?)

Do you guys think GM Dealer can figure out without whether only heads need to replace or the whole engine?
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post #6 of 8 (permalink) Old 03-23-2017, 08:01 PM Thread Starter
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Re: Oils in plugs 1 and 3 wells (not from valve gasket)

Quote:
Originally Posted by rbarrios


Fluid in Spark Plug Tubes
March 25, 2013

A Check Engine light may be illuminated with misfire DTCs set, or a possible oil or coolant leak may be found, on some 2010-2013 Enclave, LaCrosse, CTS, SRX, Camaro, Equinox, Traverse, Acadia, Terrain; 2012-2013 Caprice PPV, Captiva, Impala; 2013 ATS and XTS models equipped with 3.0L and 3.6L (RPOs LF1, LFW, LLT, LFX) HFV6 engines. (Fig. 10)
On inspection, coolant or oil may be found in a spark plug tube. Determine if the oil or coolant is coming from the spark plug tube and not leaking into it from above. If the spark plug tube is leaking, replace the cylinder head, spark plug and coil.

Porous spots in the head created during manufacturing cause the leak. The spark plug tubes are permanently sealed into the head and are not replaceable.

If a cylinder head is replaced for this condition, mark the faulty spark plug tube before sending the head in for warranty or core so GM Engineering or the re-manufacturing facility can identify it.

do you know which article or GM info links?
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post #7 of 8 (permalink) Old 03-24-2017, 10:10 AM
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Re: Oils in plugs 1 and 3 wells (not from valve gasket)

http://www.revbase.com/BBBMotor/TSb/...dPdf?id=181796

But only concerns 10-14 models...
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post #8 of 8 (permalink) Old 03-27-2017, 08:12 PM Thread Starter
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Re: Oils in plugs 1 and 3 wells (not from valve gasket)

Quote:
Originally Posted by darkstarmoto
nice thanks for a info!!!!
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