460 Burning Oil After Rebuild
Okay, here's the deal... I got my 1973 460 rebuilt by a local highly recommended rebuilder. Got it rebuilt right, pretty much stock, RV cam, .040 over with .040 pistons and moly rings. Put about $4300 into engine work. The builder told me to keep the break in oil in it for 500 miles (the oil came with a COMP cam kit), and I've had it back for almost 2 weeks and I'm right at the 500 mile mark. He didn't give me any other break in tips, just drive it. I've driven it pretty easy for the most part. Varying RPM ranges while driving (no highway cruising for more than a few minutes), and I haven't pushed it past about 3200 RPMs. I have gone WOT for a few seconds at a time, and I got the feeling the builder had pushed it some too while test driving it by the comments he made about the power. Going by the dipstick, it looks as if the engine is about a quart low on oil. Is this normal for an engine breaking in?
I haven't noticed any oil smoke. When it's cold, maybe the first 4-5 minutes before it gets to full operating temp, and I get on the gas more than about a 1/3 off a stop it seems to throw out a little black smoke, but I figure that's probably unburned fuel because the engine is cold. That goes away after it's warmed up well.
I'm going to be changing the oil tomorrow morning. I'll be running conventional 10w-30 (break in oil is also 10w-30) for the first oil change, then going to synthetic after that. This is by direction of the builder.
How long should it take to "break-in"? Are the rings still in the process of seating?
I'm planning on talking to the builder tomorrow, but I would like to hear some other opinions also. It may also help to be more informed (from you all) before I talk to him so I know the right questions to possibly ask. I'll report back what he says too.
Any answers or advice are appreciated! Thanks in advance!
Last edited by BigBlockFord; 11-06-2013 at 10:15 PM.