Hi, my name is Rob and I'm with Pulido's Automotive in Jacksonville, Fl. My partner here ownes a 1995 Landcruiser that I need a little advice on a noise it's making. The truck was using about 2 quarts of oil in between oil changes. We had the engine completely rebuilt by a local machine shop. They found there was two separate oil rings that were frozen and said that was the reason for the oil consumption. They cut the block to .40 to "clean it up" and replaced all pistons, rings, bearings, etc. The cylinder head was sent to a local cylinder head rebuilder for complete valve job, pressure test, resurface, stem seals, valve adjustment, etc. We installed all new oil pump gears, power steering pump rebuild kit, you get the picture. We did everything that we could while engine was apart, including water pump and timing chain stuff. To make a long story short, the engine has a definite valve train noise coming form the valve cover area. Oil pressure is good, it doesn't appear to be using any more oil. The cylinder head company came to our shop and rechecked the valve clearance, and shim integrity. They found six of the valves to be too tight. Toyota couldn't supply the exact correct shims so the tech "ground" the shims and checked them with a micrometer. After all this, the noise is still there. When you take off the plug wires one at a time to kill the individual cylinders, the noise stays as well. On cold start, the noise is more pronounced, and gets lighter in the first ten seconds of running. Everyone is pointing the finger at the other, and we have gone as far as to take it to the Toyota dealership. They removed the valve cover and made several recommendations as far as distributor gear lash, cam gear lash, etc. None of these have made any difference. We are not in the motor rebuilding business, but do our fair share of cylinder head gaskets. Other shops refer cylinder head work to us as well, so I think we have a good base knowledge of how it "should" work. My question to you is, have you ever heard of such a thing after a rebuild? Has going .40 over caused this issue? It sounds just like a miss adjusted valve train to me. Is it possible that the machine shop ( or our tech for that matter ) may have bent a camshaft slightly when torquing the caps down or something like that? We are pulling our hair out over here. 2000.00 dollars later, it doesn't use any oil, but sounds like a diesel. And helpful hints or suggestions to look at it from another angle would be a HUGE help. Thanks in advance.