QuantumRift
Been here awhile...
Hey, never mind - I was able to replace the plugs this afternoon....I was able to figure this out and didn't need the long hex - I was able to use a 10mm deep well 1/4" drive socket. On a scale of 1 to 10, with one being easiest and 10 being most complex or difficult, I would give this a rating of about 3 with my skillset.
Basically it involved removing the air intake ducting from the inlet box. Removing the six (6) 10mm bolts (that have a hex key hole) that are DOWN in the dee[ holes on the top of the plastic intake plenum. There are two 10mm nuts in the front as well that hold the front part. Then you have to disconnect a few hoses with pair of pliers (they are readily apparent, such as the PCV hose, the throttle body coolant hose, etc), and on the driver's side there 's a wire bundle you need to unsnap from the two anchor points on the manifold.
One CAVEAT: The two bolts at the very back of the plenum, when you loosen them, do not try to REMOVE them from recessed holes. They basically hold down the back and they are not 'captive' in those holes, you can lift them up a bit, and if you drop them they'll disappear down the back of the engine.
Once you get it all disconnected, you only have to raise the driver's side of the plenum about 6" and towards the driver's side a couple of inches. It will give you enough room to access the plugs on the driver's side. The right side plugs are easy to to get to as well.
One done, reverse the procedure. Since this was my first time and I was being slow and methodical, it took me a couple of hours. After doing it once, though, I think it could be done in under an hour, easy.
My Genny has about 75,000 miles and the plugs looked visibly worn and in need of replacement.
Basically it involved removing the air intake ducting from the inlet box. Removing the six (6) 10mm bolts (that have a hex key hole) that are DOWN in the dee[ holes on the top of the plastic intake plenum. There are two 10mm nuts in the front as well that hold the front part. Then you have to disconnect a few hoses with pair of pliers (they are readily apparent, such as the PCV hose, the throttle body coolant hose, etc), and on the driver's side there 's a wire bundle you need to unsnap from the two anchor points on the manifold.
One CAVEAT: The two bolts at the very back of the plenum, when you loosen them, do not try to REMOVE them from recessed holes. They basically hold down the back and they are not 'captive' in those holes, you can lift them up a bit, and if you drop them they'll disappear down the back of the engine.
Once you get it all disconnected, you only have to raise the driver's side of the plenum about 6" and towards the driver's side a couple of inches. It will give you enough room to access the plugs on the driver's side. The right side plugs are easy to to get to as well.
One done, reverse the procedure. Since this was my first time and I was being slow and methodical, it took me a couple of hours. After doing it once, though, I think it could be done in under an hour, easy.
My Genny has about 75,000 miles and the plugs looked visibly worn and in need of replacement.
I wouldn't think it's all that different. The two bolts, if you can shine a flashlight down in there and look, may have hex-center holes, but a thin-wall socket should work as well. 
