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An excelent synopsis. I would only like to add that having the circulating coolant "wanded" using emission testing equipment will ID the smallest amount of head-gasket seepage.
There are three other sources for coolant seepage which might go unnoticed: (1) The Water (coolant) Bypass Inlet Pipe O-rings connecting the Water Passage to the Thermostat Case; (2) The O-Ring from the Coolant Connecting Pipe (under Intake Manifold) connected to the Thermostat base and the other end connected to a heater hose; and (3) The coolant hoses connected to the Fast Idle valve and the Coolant Connecting Pipe.
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Eyebrows
KMS Strut Bar
Enkei 16" J-Lips
Wings West Spoiler w/LED
Clear Corner Lens
Clear Bumper Lens
Clear Rear Side Markers
Brembo X-Drilled/Slotted
Stainless Braided Brake Hoses
Focus 2500 Driving Lamps
Gold Pkg
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