-87 wolf w/ 81k miles
-small coolant leak, about a quarter sized drop of coolant every
couple of days
-head gasket replaced at about 70k

I went to go check the engine oil, added a quart of 10/30w oil then
parked it in the garage. A week went by before I pulled it out and
then my waterbox started making noise. pistion slap, I think. It
wasnt a knocking noise. I didnt let it warm up completely because i
had to pull the steering rack to get a replacement and was running
short on sunlight. it does not go away when i rev the engine, it
just doesnt sound as loud and I didnt let it warm up. The temp in
NYC also dropped into the 30's.

-What is the potential cause of the sound?
-What are my potential problems if the sound doesnt go away?
-Will I grenade my motor?

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