Drained the coolant and thoroughly flushed everything. There was absolutely no gunk or sludge anywhere (except a bit of dirt dislodged from backflushing the heater core). Replaced the thermostat and gasket with new (OEM) after testing/verifying it in a hot water bath. Also replaced radiator...
I'm glad to hear that! Makes me feel a bit better, but still confused as to what these silver floaters are.
I took a good look at it and the radiator is pretty spotless. I pressure washed it (as good as I could without removing anything) a couple months ago and it's still clean from that.
I'm...
Great read! Thank you for linking this. I think I will do a Blackstone OA but from what my symptoms are, I think a blown HG is very unlikely. I went ahead and hooked up my "burp coolant funnel" thing and ran the engine for ~30 minutes with heater on max and rear heat on. Revved to 2500rpms a...
That's interesting... Maybe I'm misremembering what he told me, but I could have sworn that he said "it blew the head gasket but was professionally repaired". Maybe he was just referring to the prior owner (ie your mechanic)?
I don't routinely check the coolant at the cap, so it could have been...
The overheating used to be both on the highway (uphill, AC on) as well as idling (AC on). I modded the fan clutch (45mL of 20k cst oil) and that seems to have resolved the issue while on highway, but I'm still overheating while idling with the AC on. And by overheating I mean ~225, just enough...