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Old 10-19-2008, 04:25 PM
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Tiny bubbles, (603 pre-chambers)

When I wash the engine (yeah, my Wife says so too) and start the car, I get tiny bubbles around the pre-chamber (on the side with the little dimple in the bore, about 4:00). I first thought this was a bad thing, noticed it on #2 cylinder, but now I notice the water bubbles a tiny bit around all pre-chambers. Maybe water goes down and boils out? Happens right away with the engine cold (block-heater warm).

Does this seem normal? I swear it leaks a little compression through there, but the car idles fine and could hardly be leaking on all cylinders the same. Just the one spot, around 4:00, next to the little notch.

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Old 10-19-2008, 07:06 PM
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Don't worry about it, a lot of them do that.
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Old 10-19-2008, 07:09 PM
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I vote that the pre-chamber sealing rings are getting old and tired. The amount of the leak is insignificant, however, when compared to the volume of the cylinder and the very short time span available per stroke.

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