1. Running a mix of 89 & 91 octane gas
2. it IS a 1.9 block that was rebuilt to 2.1
3. the previous engine did have a problem with the #1 cylinder
destructing.

So, maybe I have piston slap, bad injector, and a clogged coolant
pipe too?    Maybe i should just push the thing off a cliff and save
myself the worry?