TOOMUCH

when the engine ,KA24DE-T, is at around 950 -1200 rpms there is a lot of tapping noise and i really cannot be sure where it is. But it goes away when the rpm is raised, oil pressure is a little less than 25 lbs. at low rpm but just over 50 at higher rpm. Now on my cam clearance i do have a couple that are a couple thousands tight and a few that are wide but only a couple of thousand like .001" or .002" but at low rpm it sounds bad almost like a deisel. please any advise would be helpfull.

rogoman

The tapping noise could be a combination of fuel injector ticking and large valve lifter clearances.

With the motor fully warmed up, here are the lifter clearances:
Intake: 0.31 - 0.39 mm (0.012 - 0.015 ")
Exhaust: 0.33 - 0.41 mm (0.013 - 0.016 ")

TOOMUCH

does not seem to be lifters at most i've got .002" to large in a couple of lifter and it seems to be coming some ware around the # 3 and 4 cylinder below intake would a bad rod baring cause something like this because it is very loud unless i put some rpm to it. Is there something I could do to try and pin point because it does not seem to be coming from around the valve cover it seems to be loudest below intake around #3 and 4 cylinder? I had ka apart to put new pistons and ring and the rod bearing looked real good but maybe i had one spin on me is it possable that that is the noise i am hearing is because i am electrical and controls type of person just like working on fine cars can't afford real mechanic so please any help would be very very appreciated.

rogoman

Yes it could be a bad rod bearing. A bad rod bearing has a sharp metallic sound rather then a ticking sound. Pull off one spark plug wire at a time, while the motor is idling, to find the bad cylinder.