Nissan 370Z Forum - View Single Post - How do you break-in your new engine?

AH370Z · 08-22-2009, 11:01 AM

I will be doing something based on this

1. Start Egine and drive off when engine rpm drop
2. Drive easy under 2500rpm until Engine is completly warmed. Check Oil Pressure
3. WOT to 5000rpm/Engine break back down repeat x 5 in 2nd Gear
4. Repeat Step 3 with 3rd Gear
5. Drive low rpm for several more km varying rpm
6. Repeat 3 and 4
7. Drive low rpm for several more km varying rpm
6. Park Car and cool down
7. Repeat above 2 more times

So the first 32 kilometers are the most important, because this is all the mileage required for a new engine to seat the piston rings, by performing WOT, it will create the maximum temperature and pressures for the engine and components to fully expand to their maximum size, so they can wear and seat in properly. But keep in mind, too much heat buildup, resulting from Full Throttle or Full Acceleration during the first 32 kilometers, will cause glazing or heat welding between parts in the engine, resulting in loss of performance. The engine should not be floored until everything within the engine has set, and the engine has been run thru its paces, gradually running thru the whole RPM range, preferably rite after 1000kms, it is best to floor the car, just after the 1st oil change, to finally break the engine in completely.

08-22-2009, 11:01 AM	#3 (permalink)
AH370Z Base Member Join Date: Jun 2009 Location: Australia - Sydney Posts: 168 Drives: 11' 370z, 13' E92 M3 Rep Power: 16	I will be doing something based on this 1. Start Egine and drive off when engine rpm drop 2. Drive easy under 2500rpm until Engine is completly warmed. Check Oil Pressure 3. WOT to 5000rpm/Engine break back down repeat x 5 in 2nd Gear 4. Repeat Step 3 with 3rd Gear 5. Drive low rpm for several more km varying rpm 6. Repeat 3 and 4 7. Drive low rpm for several more km varying rpm 6. Park Car and cool down 7. Repeat above 2 more times So the first 32 kilometers are the most important, because this is all the mileage required for a new engine to seat the piston rings, by performing WOT, it will create the maximum temperature and pressures for the engine and components to fully expand to their maximum size, so they can wear and seat in properly. But keep in mind, too much heat buildup, resulting from Full Throttle or Full Acceleration during the first 32 kilometers, will cause glazing or heat welding between parts in the engine, resulting in loss of performance. The engine should not be floored until everything within the engine has set, and the engine has been run thru its paces, gradually running thru the whole RPM range, preferably rite after 1000kms, it is best to floor the car, just after the 1st oil change, to finally break the engine in completely.