I am just rebuilding my engine and have been told that I have to run it at 2000 rpm for 20 minutes to start off with. Is this correct because I always thought that you had to take it easy to start off with.

Your thoughts please

2000rpm for the first 20mins is to bed the cam in and is highly recommended!

2000rpm isnt much especially with no load on.

David

[Edited on 29/4/09 by flak monkey]

i think that that is the requirement for the cam to bed into the cam followers on most engines

Normally you don't except if you are bedding in a new camshaft. The camshaft kit comes with a liquid that you pour over the camshaft, but sometimes you have no choice if the engine is tight.
Just make sure that you turn it over without the plugs in and check that you have oil pressure.

This was covered the other day, have a read of this.

linky

well that goes against what i "knew" and what main dealers tell you??? I wasnt planning on driving my engine too hard for the first mile .. and i dont fanc taking it to a dyno for its first run

Anyone work, or ever been to a car plant? No point running it in cause they thrash them to death in the plant.

But like said above run the cam in as its not oem.

See this page, especially the last paragraph.