Finally fixed (I hope) the coolant leak on the 2ZZ in the MR2.  As I mentioned in this post, I had found several of the store brand (Chinese made) coolant rubber plugs to have sprung leaks.  I went ahead and ordered a whole slew of Toyota OEM plugs and clamps just in case I have any future issues.  As you can see below, the Toyota plugs are much thicker and are a better grade rubber.  The OEM clamps are also of better quality and are easy to install with the included clip that keeps the clamps open until you release it.

Batch of new Toyota plugs and clampsPlug comparison New plugs installed


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