As long as you didn't hear any knocking or any other persistent, terrible noises, and/or you didn't run it for a long time while it's hot, you should be fine.
It doesn't sound like you caused any damage. 
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ASE-certified technician by day, metal musician and computer nerd by night, and avid Nissan HB lover
1997 D21 XE KA24E 2WD 5-spd - 190,000mi
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