THECACKLER
Full Access Member
I have rebuilt my 7.3 with Turbo Pistons & Rings and Melling HP high Chrome Nickle content Sleeves in all eight cylinders. I am breaking it in with John Deere 10w-30 Break-in Oil to help prevent Cylinder wall glazing. I have just over 100 miles on the engine now and have been loading it up fuel & heat wise as much as I dare on a fresh engine. I am loading my 18' trailer with our household stuff in preparation to make another (moving) trip up to Northern Michigan. I would like to change oil back to 15w-40 Rotella T as soon as is safe but I am very concerned about glazing the cylinders which would necessitate a complete tear down to re-hone the cylinders.
The Engine has two small leaks at the main crank seals but no others. Is this normal on a fresh engine? I hope this is attributable to new engine blow-by and will subside as the rings seat. I'm keeping my fingers crossed.
My big question is how long or how many miles must I run this engine until I can be sure the rings and cylinders are broken in. I am looking for the "safe zone" when and where I can put a little heavier oil in the crankcase. How will I know?
The Engine has two small leaks at the main crank seals but no others. Is this normal on a fresh engine? I hope this is attributable to new engine blow-by and will subside as the rings seat. I'm keeping my fingers crossed.
My big question is how long or how many miles must I run this engine until I can be sure the rings and cylinders are broken in. I am looking for the "safe zone" when and where I can put a little heavier oil in the crankcase. How will I know?