Compression Ignition Addict
Join Date: Jun 2007
Location: Grand Ledge Michigan
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Do mineral spots around the overflow always indicate Blown HG's?
I louded my Looney tune last night before I went into town. Truck ran great and I did a few full throttle take offs to impress my buddy who never rode in my truck before. I was under the hood today when I saw a few white spots around my overflow bottle just like my 04 did when she blew her HG's. I also noticed that the previous owner had the recall done where Ford installed a sticker on the side of the bottle to show the coolant level much lower. I also noticed my coolant was just about to the top. I removed enough to get it down to the new indicator mark and put my street tune back on and took her for ride. No spots when I returned.
Might the problem have been too much coolant in the bottle or more likely blown HG's? My up pipe is welded shut by the way.
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