2004 Mitsubishi Eclipse 2.4 Valve tapping/clicking sound

  • 2.4L
  • 4 CYL
  • FWD
  • 105,000 MILES
I am really hoping I can figure this out here:
Recently purchased 3 generation eclipse 2004 4 cyl 2.4
It had a knocking sound coming from the bottom as well as from the top under valve cover. We took dropped the oil pan, the first cylinder rob bearing was gone and powdered up, the rest were fine but all 4 were replaced as well as it got shimmed up so there is no play at all, the crank was sanded off a little just to give it a more smooth finish even though it wasn't that bad. Then took off valve cover to find out all of the lifters but one were all burned out and no oil in them and they were all pressed in, replaced all of those to the brand new ones. Next took off the head, timing belt was off (it jumped a few teeth) replaced the timing belt, replaced the headgasket, replaced stem/oil seals, valves looked fine not bent at all. Everything else looked fine, most of the noise went away especially that lound one from the bottom, not the only noise im having is from under the valve cover and its definitely the lifters are knocking even though they are brand new and there is no play at rocker arm at all its all snug and tight. I changed oil 5 times already, the knocking starts at idle then when it warms up a little they quite down, then when start driving it is quiet at low rpm's like below 3000 but then when I drive it for more its making noise even below 3000, sometimes the noise gets quiter then when its warmer it get louder, but it never goes away. So now after 3 days I started getting the oil light on at idle, when I give more then 1000 rpm or when driving the light goes away. So that made me check my Oil Pressure with a gauge, here are the readings I got at different rpm's

Idle - 12 psi
1500 rpm - 32 psi
2000 rpm - 48 psi
2500 rpm - 54 psi
3000 rpm - 59 psi

Now the dealer said that at idle it should be 4.5 psi and after 1200 rpm it should be between 41 - 100 psi.
Does this make sense to anyone, is it my oil pump or is it my oil sending unit? Will it make my valves rattle like that?
Do you
have the same problem?
Thursday, April 24th, 2014 AT 5:00 PM

1 Reply

Oil pressure is fine a light normally only comes on at 4psi at idle. But the crank may be messed up if the bearing spun and the rod was blue. You may have alack of oil at topend or cam may be worn out. Normally when a bearaing goes the crank has to be turned and rod as well as bearing replaced. Not knowing what the cranks lookedlike or does now I can't give a better opinion.
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Friday, April 25th, 2014 AT 6:35 AM

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