need to know how to break-in lower end

[highraven99]

well as the title says i need to know break in the new rod and main bearings. if some one could let me know that would be great

[NoRalPh]

Unlike the Ring-to-Cylinder Wall "lapping-in" that takes place on a new engine, I don't think there's anything to "break in" on the Crank & Rod Inserts....

Just drive it!

[GoldieStroker944]

rule of thumb just drive it like you normaly would and check the oil to make sure it doesent use any of it

[highraven99]

thanks guys my repair manual only gave instructions for a full rebiuld and this was my first lower end rebiuld.

[GoldieStroker944]

i work for a john deere dealer and when we do an underhaul the basic rule of thumb is always run the machine as it would run under normal conditions if you have a heavy foot then drive like that and everything will come out ok did you check clearances and everything?

[highraven99]

yep clearences were checked, torque was double check. put it back together slow and easy so i had no chance of damaging anything also.

[01flatbed]

2000 rpm for 15-20 minutes on first start up then drag her to her knees and run her hard lol thats what my teacher here taught us.

[NoRalPh]

Originally Posted by 01flatbed

2000 rpm for 15-20 minutes on first start up then drag her to her knees and run her hard lol thats what my teacher here taught us.

For just Bearings? - Nonsense.....

[GoldieStroker944]

Originally Posted by highraven99

yep clearences were checked, torque was double check. put it back together slow and easy so i had no chance of damaging anything also.

sounds to me like you have a good idea of what you are doing you are good to go

[GoldieStroker944]

Originally Posted by 01flatbed

2000 rpm for 15-20 minutes on first start up then drag her to her knees and run her hard lol thats what my teacher here taught us.

yes this is true when seating the rings and when doing a complete oh but for just bearings not really nessessary