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Old 05-15-2020, 06:23 PM   #1
Scooby Newbie
Member#: 514784
Join Date: May 2020
Location: So cal high desert
Default Engine gets too hot (I'm stumped).

So I just bought a 2006 Forester XT. This is my second Forester. My other is a 2007 n/a.
The xt has 117,000 miles on it. I am noticing that if I really hit the gas on a hill it seems like the temperature gauge starts going up in sync with the throttle. I mash the gas and the needle starts going up fast but as soon as I let off it starts going down immediately. I burped the system with a spill free funnel 4 times now and every time I keep getting a bunch of air out of the system. I pressure tested the cooling system today and it held constant pressure for a half hour no problem. I've also block tested it about four or five times and it's not telling me that it's a head gasket. I also see no smoke or anything out of the exhaust. The thermostat was replaced about 20,000 miles ago with an oe model according to the receipts that came with the car. The bottom radiator hose gets hot so I'm pretty sure it's opening and the fans also seem to kick on when they should. The weird thing is is that I drove the car 600 miles home after I bought it and it didn't start to get hot at all until halfway home. I watched the gauge like a hawk so I never let it get above 2/3 on the temp gauge.
does anybody have any ideas on what this could be or how I could go about troubleshooting it? I feel like I've exhausted most of my resources here.
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