Quote:
Originally Posted by ls1nova71
Pretty sure that 4.8's and 5.3's use the same head gasket, so the tag doesn't always match. The easiest way to find out if it's a 4.8 or 5.3 is to pull the heads, but you can pull a spark plug and shine a flashlight in the hole to see if the top of the piston is flat or dished. Flat is 5.3, dished is 4.8.
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So when I shine a light down the spark plug hole I am not seeing anything really. Do I need to spin the motor a bit to bring the piston down to the bottom of the stroke? Pulling the plugs I noticed the drivers side set of plugs were black and the pass were white chalky look to them. Throught that was a bit odd.
I am just a bit worried pulling the heads since I have not done it before. Seen it in videos and... well on TV. I have all the tools; just might have to do it. Can I reuse all the head bolts or do I need new ones if I pull them. I assume I would just be pulling the bolts, checking then putting everything back together, with new head gasket of course.
My PCM came back as a 4.8 from a 06 Tahoe...Makes me worried and I think I need to be absolutley sure.