Originally Posted By: A_Harman
Originally Posted By: fpracha
Originally Posted By: CATERHAM
Originally Posted By: ChattZX
Will do man. Do you have any personal tips on breaking in a new engine?
I don't recall but did you go all the way with new rings, bores etc?
If you didn't there's nothing special required, if you did there are some very good write-ups on the proper way to set the rings.
But basically you vary the rpm when crusing, increase the maximum rpm limit slowly for the first 2,000 miles. No excessive idling. After 1,500 - 2,000 miles periodically run the engine up to red line under full throttle once it is fully warm of course. I wouldn't consider tracking the car until you have about 5,000 road miles on it.
Very useful thread indeed!
Going by the above guidelines, if we consider large industrial power engines (1 MW), 1500-2000 miles equals approx 80-100 hours of operation. Can anyone confirm if in a large off-the-road "fully rebuilt" engine, the new Rings will set properly within the 1st 80-100 hours ?
If yes, how do we confirm that the rings are "setting properly" , and what will indicate that finally setting of the the rings is successfully completed ?
All comments are welcome and actual hands-on experiences are indeed warmly welcomed from all of you experts!
When I was an engineer at Cummins, our practice in breaking in the large industrial and heavy duty engines was to get them up to rated power as soon as possible after confirming good oil pressure and safe operating temperatures. Our general rule was that if you didn't get to rated power in the first 20 minutes of operation, the liners would glaze, and the rings wouldn't seat properly. High blowby and oil consumption was the result.
Many thanks friend for this helpful guideline.
Does it also apply equally to Diesel and Natural Gas fueled engines ?
If we did not do the procedure correctly, is there a definitive method to test for this specific fault (incomplete rings seating), other than a full tear down ?
We would really want to save the cost of tear down and be sure that it is the only solution if we must tear down, by first using some dependable tools you can point us to (before deciding for a tear down). All help welcome!