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Just after the "run it for 20 minutes for new cams" "The second part of breaking-in an engine isn't really that important. I don't believe in driving under 60 MPH or keeping the revs below 4,000 RPM for the first 500 miles. What I usually recommend is that after the cam is broken-in, go drive up a hill a couple of times, slowing and accelerating as you go up. This builds-up heat and puts a variable load on the engine which helps seat the rings. Pussy-footin' a new engine can cause the cylinders to glaze and the rings may never seat properly. As far as revving the engine? Go for it! You don't think we build race engines and drive them for 500 or 1,000 miles before we rev them up do you? Heck no! As soon as the cam is broken-in, it's at the red line, going down the track! What you want to avoid on street engines besides pussy-footin' around is getting on the highway and going the same speed for extended periods of time. It doesn't matter if it's 40MPH or 70MPH, just don't hold it there. Instead, vary your speed, pass a few people and then slow down for a bit, and then speed back up. This varies the engine load and helps things seat-in better. Be sure to change your oil and filter after the first hundred or so miles because when an engine breaks-in, little tiny, fine particles of metal are wearing-off inside and floating around in the oil. This is all pert of the break-in process and is totally normal."
Your powers are useless! I'm wearing my tinfoil underwear! |
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