ClankBang
Internet Excogitator
You got it. I don't know if it is a definative test but if there are bubbles then you have Head Gasket Issues. In other words no false positives only false negatives.
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It had to happen sooner or later. I'm going to show my ignorance. What is the significance of bubbles in the coolant overflow tank? I'll assume this has to do with an HG issue? thanks again for all the help, brian.
FWIW my HG went in literally a minute... no signs.
....and it was my truck for 2 weeks prior to this
that's how my 4runner went, started smoking on the highway, pulled over in the middle of red mtn. and coolant was boiling out of it. I didn't think the later motors failed like that, I thought it was a more gradual failure. yours wasn't bubbling before that?