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| Smashed electrod https://slantsix.org/forum/viewtopic.php?f=19&t=50455 |
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| Author: | lowbudget [ Thu Nov 29, 2012 7:20 am ] |
| Post subject: | Smashed electrod |
After making a 60 mile trip my 77 Aspen started running rough coming down Main Street. When I got home I pulled the plugs and found the electrode on the #2 plug bent over to the side and 1/4 of the insulator missing. So what happened?????? Both bolts on choke plate are still there. A quick comp check showed 85 PSI compared to 105 on #3 If I have time I'm going to pull the valve cover off when I get home tonight. Thanks In advance Mike[/img] |
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| Author: | Slanted Opinion [ Thu Nov 29, 2012 10:14 am ] |
| Post subject: | |
Well, we know that your plug to piston clearance didn't suddenly change, so perhaps the insulator cracked, fell down into the cylinder and got mashed into the electrode. I think I would install another plug, crank the engine over with the coil disconnected, and then remove the plug to see if it is undamaged. - Mac |
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| Author: | lowbudget [ Fri Nov 30, 2012 2:22 pm ] |
| Post subject: | |
I cranked it over with out plug before I stuck my compression gauge in it. I put a new plug in it and cranked it over, then started it and ran it a couple minutes. The gap was the same as when installed. I guess I will pull the head come spring and look at everything just for piece of mind. I would do it now but I'm headed back to work for 28 days. Thanks Mike |
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| Author: | Rug_Trucker [ Fri Nov 30, 2012 10:00 pm ] |
| Post subject: | |
Autolite? Champion? What brand? |
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| Author: | lowbudget [ Sat Dec 01, 2012 7:46 am ] |
| Post subject: | |
NGK's that have been in car for 10,000 miles at least. |
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| Author: | emsvitil [ Sat Dec 01, 2012 4:11 pm ] |
| Post subject: | |
Some detonation/pinging may have cracked the porcelain. Then it broke off, bounced around and bent the electrode. |
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| Author: | Supercharged SL6 [ Sat Dec 01, 2012 4:18 pm ] |
| Post subject: | |
More than likely the detonation took the top of the piston land off |
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