I just put a d15b vtec in my 91 dx. Is there a need to break in the motor, since it has been sitting in a salvage yard or wherever before I got it?

 

There's really no break-in period since the motor isn't a freshly rebuilt one. Just give it a few miles before you start really running it hard. I tend to change the oil and do a coolant flush after about 1000 miles on a motor that has been sitting for a while but that's about it. After that it's just normal service.

 

k, thanks