Well I just changed my plugs this weekend, along with a bunch of other stuff, but I have a question about what I found. I have an '02 SSEI with 55000 miles first of all. When I pulled out the plugs I checked the gap on them before I put in the new plugs. I found three plugs with a gap of .070, two with .065, and one that was .060 Now I know that stock is .060 and that is what the new ones I put in are set at. I am just curious if this is normal?? Can the plug gap change over time like that?? I am the second owner so they may have been changed another time but I doubt it. The plugs I pulled out were all full of carbon and the threads were rusted out. I was just curious and thought I would ask.

I also changed the plug wires, put in a 180 thermostat, emptied the cooling system and put in new dexcool, put in new oxygen sensor and switched to Mobile 1 oil. Car seems to run a little better and start a little better. I filled the radiator up to just below the filler neck and filled up the resivor. I waited two mins. and toped them off again. I then ran the engine and AC for awhile. I toped it off again. I then let is set and the resivor was empty. Filled it up again and then again this morning I had to put some more in it after it sat. Is this common?? I think I have it full now though. I checked the drain plug, which is a pain to get to and it is just fine, no leaks.

Thanks for all those that provided info via my other posts and PM'*. I am new to my Bonneville and there are alot of things that I would normally pay someone to do but I have now done myself with everyones help. I just need to change the SC oil and I will have it all serviced.

What brand of plugs did you have in the car that you pulled out? That'* important. Brand and type.

For the coolant, that'* normal. Topping off a couple times is needed as the system burps out air from the thermostat change. Not sure if yours has it, but mine has a small bleed screw on top of the stat housing to bleed from, but it never gets it all. I just top off a couple days later.

Supercharger oil is a snap. Some tips and tricks in Techinfo on that.

The plugs I took out were the stock AC Delco plugs. They looked just like the Iridium AC Delco plugs that I put in it new this weekend. I just couldn't believe that they were all different.

As for the radiator I did bleed the air out but it seems it is still settling. No big deal.

Mine where gapped upwards of .75 when I replaced the stock plugs at 112K.