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Just got done with my install, topped off while running, revved to 2k rpm, went for a test drive and she stayed at 199 for most of the drive but crept up to 208 after going up a Long Hill. Parked it at home and left the hood open to cool off walked back by and saw this.
Just got done with my install, topped off while running, revved to 2k rpm, went for a test drive and she stayed at 199 for most of the drive but crept up to 208 after going up a Long Hill. Parked it at home and left the hood open to cool off walked back by and saw this.
I think I got some air out, at least I saw air bubbles in the tank. Went for a ride and it didn't get as hot granted it's 10-15F cooler ambient today. It's still cooling off after my ride but it's been parked for at least 2 hours and it's not as flat as it was the last time.
At this point take the simplest route pull the thermostat, rebleed leave it out and go for drive. You could have a problem with the thermostat, rad cap or the bleed hole in the thermostat could be blocked. The hose collapses because of a vacuum created when the engine cools if it still does it with the thermostat out.
Try running with the cap 1/4 to half turn loose, leave the thermostat out, if you still get a flat hose it could just be the hose or something else preventing normal coolant flow.