is a break-in necessary?

[c!v!c]

I'm in the process of putting a B16A SiR-II into my Civic, and I've seen some stuff around about limiting RPMs for a long time, and then pissedoffsol says take the car to a dyno and get it tuned... but I've gotta drive this car all of the time, and I certainly don't have the money to get my car dyno tuned, I spent all my cash on the motor.

What I don't get is why a break-in is necessary since the motor has been used before, and nothing has been changed internally, it's a simple swap. Or am I just reading wrong and the break-in stuff is for motors with new parts?

 

[AHHVTEC]

well this is just me but if its a used motor i would put about 100-200 miles on it then i would drive it like normal, or whatever

 

[allspoolin]

yeah i wouldent do a complete "break-in" run on it, just drive like a grandma for a few miles and see how everything is working, leaks ect. then drive it like smokey and the bandit

 

[phunky.buddha]

If the engine is completely stock and running the correct ECU for the engine, there's no reason to tun it no a dyno.

 

[hcivic.com]

take it easy for the first week to make sure nothing ticks or leaks, ect. Then kick the shit out of it

 

[TurboMirage]

why not save up and swap it when you can afford dyno time?

 

[formby]

Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power

 

[hazzardboy95]

Thats what I did, I got a motor from hmotorsonline, it already had maybe 25,000 miles on it and after it went in I let it run for a while sorted out the issues and then started driving it like It like I use to drive it.