Guys,
The time has come to break in a newly rebuilt aaz.......new pistons, bearings, rings, valves, springs etc, but using the old crank and cam shaft.
I have read this break-in FAQ, but would still like a little more clarification on the specifics of loading the engine, how long and how much load, and the rpms I need to hit, to CORRECTLY break in this engine. I have one chance to get it right.
http://vwdiesel.net/forum/index.php/topic,33755.0.html So my questions are......
1] Do I let the engine come up to temp [ have the fan cycle on / off once ] gently with no load, and then begin driving it?
2] Loading the engine.......how long should the "load" runs last at first? 3 or 4 seconds? I have low to moderate hills I can go up and down, about 6 percent grade. I do have some longer hills [ like a full minute to drive up, or longer ] with steeper grades I can drive, but they are 20 mins away from home.
3] When to begin increasing the duration and steepness of the load runs? After 30 mins of the short loads runs? Longer?
4] I understand that the negative load is as important as the positive loading of the rings for break in, so coasting down a hill in a gear that allows for engine breaking is good? How often do I need to do negative load runs?
5] RPM's. After the engine has warmed up, what rpms should I be reaching? Up to 3000 rpm? Up to 4000 rpm? Short bursts or?
6] Cooling of the rings / engine between runs......is this achieved by gentle driving for a period of time? If so, for how long to "cool" the engine before doing another loading run?
7] How long should this first driving session last? And what about subsequent driving sessions? Longer than the first? An hour? Less / more?
My rig is a samurai, heavier than stock, lower gears and 33" tires. Engine is bone stock aaz, Ko3, no fuel mods [ yet ]. Loading the engine will come easier with this weight and gearing vs a jetta or golf.
Thanks for your input. As mentioned, I have one chance to do this right.