I bought a 1987 VG30E S12 SE from Craigslist, I did a radiator cap leakdown test using the MightyVac before I bought the car, set it to 13psi and left it alone for 10 minutes, there was zero leak to speak of.
Then I wanted to get an exhaust sound video for the car after i removed the terrible awful broken muffler steel-wire install, so I made a quick video,
https://youtu.be/6R54DrH46OA - it looks like there is some definite white smoke coming from the exhaust.
I hooked up the leakdown test again, and it still tests perfectly, no leaks to speak of. I've also ran the car for 1-2 hours and the temperature gauge seems to work just fine, it goes from cold to hot at a steady slow pace until it reaches the middle of the gauge and them stops there, appears to be cooling just fine.
Is this just condensation? What am I missing?
Sorry if this is not the right forum subsection, feel free to move it if so, I didn't see a cooling system section.