I've never had cooling issues since I built my stroker 10 years ago. My temp gauge rises smoothly as it warms up. The temp then stays consistent at around 170 / 180. A little higher in hard driving or traffic.
Lately its been suddenly rising from 180 to 210 over a minute or so and then falls back to 180 just as quickly. This will happen a few times during highway cruising with no change in speed or conditions to cause this. I assumed the thermostat was sticking so I got a replacement.
I got the 330-180 and when I was getting ready to replace it this is what I found inside. Isn't there supposed to be an opening in the center of this ring that the t-stat plugs as it opens / closes?
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