2007 Hummer H3 cant find spark plugs for my 2007 Hummer H3

Tiny
CWBSTEVENS
  • MEMBER
  • 2007 HUMMER H3
Engine Mechanical problem
2007 Hummer H3 6 cyl Four Wheel Drive Automatic

where are the spark plugs on my 2007 hummer h3?
Tuesday, June 2nd, 2009 AT 3:49 PM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
If you have the inline 5 cylinder, It has a large plastic box on the top of the engine. This box has two 10mm bolts that anchor it on the passenger side of the valve cover, , the hose clamp on the tube at the throttle body, and the hose clamp at the air inlet pipe after the mass airflow sensor. There is a pcv tube connected at the rear, it just pushes on either the cam cover or the chamber, just remember it on reassembly or a check engine light will result. There are 5 coils, held down with 10mm bolts, completely loosen the bolts and remove the coils. It is not necessary to electrically disconnect them, and they are all the same. The plugs are below the coils, 5/8" socket gets them out.
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Tuesday, June 2nd, 2009 AT 9:32 PM

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