Ooops, you are correct. I was thinking of Lq4 and 9. Cast iron block. Aluminum head....No GM 5.3L ever had cast iron heads, which is where spark plugs are installed.
*There was a couple years (1999-2000) that the LQ4 6.0L did have iron heads
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I'm gonna say that LGZ "catch can" is working if there was no oil in the intake.Hugh drop in fuel econ. Went from 19 down to 15/16 per. As for the Valves, It was Carbon up. No oil in the intake. With the amount of Carbon on the plug, to me seems a bit rich, but it is cold in Michigan.
5 THINGS YOU SHOULD KNOW ABOUT SPARK PLUGS.The five things you should know about spark plugs include information on anti-seize, corona stain, gapping fine wire, torque and copper spark plugs.ngksparkplugs.com
Well the install instructions for GM OE don't say to use anti sieze either:5 THINGS YOU SHOULD KNOW ABOUT SPARK PLUGS
NGK spark plugs feature trivalent plating. This silver or chrome-colored finish on the threads is designed to provide corrosion resistance against moisture and chemicals. The coating also acts as a release agent during spark plug removal. NGK spark plugs are installed at the factory dry, without lubrication or anti-seize.
Anti-seize can act as a lubricant, altering torque values up to 20 percent, increasing the risk of spark plug thread breakage and/or metal shell stretch. Thread breakage can sometimes involve removing the cylinder head for repair. Metal shell stretch changes the heat rating of the spark plug and can result in serious engine damage caused by pre-ignition. Do not use anti-seize or lubricant on NGK spark plugs. It is completely unnecessary and can be detrimental.
This is on NGK, Not AC Delco. Auto Parts: GM OE (Professional) Iridium Spark Plugs | ACDelco
No where does GM say do or don't.
I'm from the old school days. Aluminum Head needs just a tickle of the gray stuff.
Well the install instructions for GM OE don't say to use anti sieze either:
Visually inspect spark plugs for signs of wear. Follow these steps for removing spark plugs for inspection, servicing or replacement:
Auto Parts: GM OE (Professional) Iridium Spark Plugs | ACDelco
- Grasp the spark plug boot and gently rotate it 90 degrees counterclockwise. Pull the spark plug boot and cable away from the spark plug. If necessary, use a spark plug boot removing tool. DO NOT grab or violently pull spark plug cables.
- Brush or air blast dirt away from the well areas before removing spark plugs. CAUTION: Use goggles to protect eyes from debris when applying compressed air to spark plug wells.
- Use the correct deep socket size to loosen each spark plug one or two turns. NOTE: To remove spark plugs from aluminum heads, allow the engine to cool. The heat of the engine, in combination with a spark plug that is still hot, may cause the spark plug threads to strip the cylinder head upon removal.
- Remove each spark plug and place each one in a tray by cylinder number. This will help identify and relate any unusual condition to the cylinder involved.
- Apply dielectric grease into the boot area to reduce the chance of exterior tracking on the buttress tower of the spark plug. This grease also promotes a good heat transfer between the spark terminal screw and boot terminal.
- Before installing new spark plugs, use a gap guide to make sure your new spark plugs have the correct gap.
- Install spark plugs or glow plugs to the proper torque per the manufacturers’ specification.
Yes, I know they don't. Thus I did say this. (See above)No where does GM say do or don't.