Oh Oh, #5 plug again.Bent electrode again. I do notice a shiny spec right on the bend of the electrode. Now what, Trouble? Aluminum from piston? What would cause only this cylinder to do this? Piston hitting plug? Electrode isnt smashed, but gap is closed to approx .010.
Bent spark plug electrode update
- Thread starter skids
- Start date
magicv8
Well-known member
Of course the piston is hitting it. If you dont have domed pistons, you have a bearing or wrist pin problem in need of attention. If you do have domed pistons - say 10.5 to 12:1 compression - you need to index the plugs.
allcoupedup
Well-known member
Skids - Did you ever mention which plug you are using? Some plugs have extended tips.
Brian
Brian
- Thread starter
- #4
plugs
I'm using AC Rapdifire #7, but today I got some R45's. About a 1/4" less protrusion into head. These will work just fine I'm sure. But, I never had this problem before, till recently. Maybe the Rapidfires were OK, but maybe by reinstalling them a few times, the gasket got compressed too much and allowed plug to protrude too far into head. Sound probable?
I'm using AC Rapdifire #7, but today I got some R45's. About a 1/4" less protrusion into head. These will work just fine I'm sure. But, I never had this problem before, till recently. Maybe the Rapidfires were OK, but maybe by reinstalling them a few times, the gasket got compressed too much and allowed plug to protrude too far into head. Sound probable?
magicv8
Well-known member
I use r45s extended tip plugs, but I specified dished pistons so that I can run 87-89 octane - high test in the mountains.
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