Filled it up with distilled water, there's a slow but steady leak coming from the hose that is attached to the bottoms of the expansion tank. It's either the hose, the connection between tank and hose, or the actual tank.
Also burned like 1.5L of oil LOL.
But I did end up mounting my new tailights, and found out that it came with new gaskets. Welp just received my order of a set too. Anyone want a set of e46 taillight gaskets?
Only issue I found was that when mounting a relay box, the rear liner doesn't fit anymore.
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