ok i just recently replaced my timing chain, tensioner, guides and gears on my 93 D21 4x4 KA24E. before i did this it did not burn One drop of oil. Now that ive changed thses parts the truck is burning oil. where i have to add a quart about every week. ive checked for leaks, and everything is dry. the truck has 79859 miles on it. The truck runs excellent, not a tick, sqeal or anything. So how would it burn oil now that ive changed the timing componants? I did a compression check, and it had almost perfect compression,(It was at 5% on the dial, and 0 means perfect) so i know that part is good. Anyone know what could have happened?