yes, delco iridiums are oem.

 

I was replacing my spark plugs AC Delco iredium, on 06 H3. I did cylinder # 2 first-just easy access, then went to cylinder # 3, removed spark plug, no problem but putting the new one in it felt tight so I backed it out and tried again but still felt the same.. So I proceeded on to cylinders # 1, # 4, and # 5, all smooth and easy. I'm back on # 3 but not sure what to do, can thread it maybe 1/4-1/3rd in and then it's really tight. Any suggestions?
athlexce
New User


Posts: 1
Joined: Sun Sep 23, 2012 8:37 am
Vehicle: 06 H3

 

If anyone has this problem, I used a 14mm extended spark plug thread chaser and it fix he problem...FYI

 

Thanks for the tip.
Chris

 

Just getting ready to change the plugs on my 2006 H3 and was wondering if anyone knows the proper torque? I looked up the torque specification for a 2007 PT Cruiser (Just happened to have that Hayes manual at hand) and they call for 156 inch pounds - sounds about right for an aluminum head.

Any suggestions?

Thanks!

 

So I was able to change 4 of the 5 plugs (went with AC Delco Iridium plugs). The fifth one is the one closet to the radiator. There is a plastic tray or "wire loom" that sits over the coil pack and there doesn't seem to be enough room to get the coil pack out without moving the wire loom.

There are two plastic fasteners inside the loom (again its more like a plastic tray). The fasteners are white in color and look like 3/4s of a circle. The spin around, but spinning them doesn't seem to loosen them, or put them in a position where the loom can be lifted slightly. That's all it needs to do is to be lifted slightly.

Any suggestions?

Thanks.

BTW, I figured out the torque for the plugs - I went with 12 foot pounds, if I did it again, I'd probably go with 14 because 12 foot pounds doesn't seem that tight.

 

guys after reading this thread I am changing this weekend...BUT looking at these for 89K miles any opinions?

Thank you in advance.

 

Changed mine at about 75k miles because I thought it was about time. Runs the same.

 

I tell you what.. The dealer replaced my head, sensor and plugs and I did not notice any gas mileage improvement whatsoever. Down the road I might pull them to make sure they are gaped right.

 

Since you guys insist upon keeping this 2009 thread alive, let me sum it up for you:

1) Spark plug change for all H3s is 100,000 Miles, change them before that and you are just pissin away $$;
2) Use OEM ACDelco plugs; and,
3) Aftermarket super duper special spark plugs (insert brand name x here) are not going to create any performance increase in a high capacity discharge computer controlled distributorless ignition. Spark timing, length and intensity are all computer controlled. The GM systems put out tons of Juice and the ACDelcos are engineered to take it. The plug itself is simply the conduit, today a good one is measured by its ability to reliably withstand long service, it can ONLY do what the computer tells it.