22re break in?

[stormtaco]

i have heard a couple of ways now 2000K rpm for a couple of min. normal idle 3 times at 15min, what is the most preferred way thanks james

[corax]

before you start it: pull all the spark plugs, hook up a battery charger (to keep the battery voltage up) and crank it until the oil light goes out. This way you're filling the oil galleys with no load on any of the bearings.

no load, 2000 rpm for 5-10 minutes then shut the engine off <- this is to breakin in the camshaft

for engine break in do NOT baby the throttle, you have one shot at getting the rings to seal properly and they need the high cylinder pressures to do it - once the machined finish is worn off the cylinder walls everything is broken in and done

this guy gets it (http://www.mototuneusa.com/break_in_secrets.htm)

What&#39;s The Best Way To Break-In A New Engine ??
The Short Answer: Run it Hard !

Why ??
Nowadays, the piston ring seal is really what the break in process is all about. Contrary to popular belief, piston rings don&#39;t seal the combustion pressure by spring tension. Ring tension is necessary only to "scrape" the oil to prevent it from entering the combustion chamber.

If you think about it, the ring exerts maybe 5-10 lbs of spring tension against the cylinder wall ...
How can such a small amount of spring tension seal against thousands of
PSI (Pounds Per Square Inch) of combustion pressure ??
Of course it can&#39;t.

How Do Rings Seal Against Tremendous Combustion Pressure ??

From the actual gas pressure itself !! It passes over the top of the ring, and gets behind it to force it outward against the cylinder wall. The problem is that new rings are far from perfect and they must be worn in quite a bit in order to completely seal all the way around the bore. If the gas pressure is strong enough during the engine&#39;s first miles of operation (open that throttle !!!), then the entire ring will wear into
the cylinder surface, to seal the combustion pressure as well as possible.


The Problem With "Easy Break In" ...
The honed crosshatch pattern in the cylinder bore acts like a file to allow the rings to wear. The rings quickly wear down the "peaks" of this roughness, regardless of how hard the engine is run.

There&#39;s a very small window of opportunity to get the rings to seal really well ... the first 20 miles !!

If the rings aren&#39;t forced against the walls soon enough, they&#39;ll use up the roughness before they fully seat. Once that happens there is no solution but to re hone the cylinders, install new rings and start over again.

[stormtaco]

cool cool thanks for the info :thumbup: