Engine noise, oil pump problem?

[reza]

My 240SX suddenly is very noisy like a truck diesel engine. And it would not go away.I opened the Valve cover and found pieces of plastics everywhere...

Idle is fine, oil pressure is not there, I left my oil filter off, and no oil coming out. I am afraid the oil pump is gone.

I took picture of the timing chain, it seems fine. Maybe the guide is not, its hard to see from top.

Any ideas?

[180fan]

wow, that's pretty bad. If you can get a better angle of almost straight down see if the timing chain oil jet is still there. It may have been knocked out by the chain guide giving out which would explain your lack of oil pressure.

[reza]

Would this help?Where is this location of oil jets?

[reza]

Is the engine still okay? Is it worth changing the following: timing chain, chain guides, oil pump, clean up oil pan off. What other parts do I need?

[reza]

the valves...

[benemorius]

Don't bother doing anything else until you get the oil pressure back. How long did you let the engine run this way? Be specific. The difference between thirty seconds and ten minutes is the difference between you buying a new oil pump and you buying a new engine.

[reza]

Not too long, but I did start the car many times to check it.Hmm...What kind of damage would that be to the engine? And why the oil pump stop? Is it because of the plastics ? How do I clean the engine internals off plastics...

reza

[reza]

up

[benemorius]

up

Sorry. Missed it.

I would venture to say that as long as you didn't drive it that way or run it for more than half a minute at a time or rev it much over idle, you're probably more or less safe. Seeing as how you have no oil coming out the oil filter port, either your oil is too low to reach the sump, or your pump has just completely given up. The oil pump is VERY easy to replace on the KA24E compared to other engines. I'd go ahead and do it if I were you. Once you have oil pressure back you can assess the damage that may or may not have occured to the engine. Worst case is that you wind up needing a new engine after all, in which case you can take the new oil pump and use it on that engine instead. Replacing the oil pump on a used engine is never a bad idea.

There are probably hundreds of ka's out there right now running just peachy with a bunch of that plastic floating around in their oil pan. While it would be prudent to drop the pan and remove it, I've never seen it do any damage down there. It's too big to be sucked up by the sump, and too hard to clog it up.

[180fan]

However, you do have narrow passages where splinters of plastic can easily gum up the works. I'd suggest at least pulling the oil pan off and trying to spray in some oil to try to get the little bits of junk out at the very least.

[reza]

Alright....

I replaced the following: timing chain, chain guides, tensioner, cam sprocket, crank sprocket. Clean up all the plastic gunk in oil pan, clean up the oil pickup screen. So everything is good now.But I still have loud tapping noise from valve cover area.And RPM independent, I have this loud noise from rear of engine, near clutch area. It seems that something is loose, from time to time it would emit screeching noise, clanking, that I can feel in the shiftter.transmission seems fine, because if I just cruise with clutch in, tranning seems smooth.One thing that happen is during tightening the crankshaft bolt, I had put it in 5th gear. Then I can't take it out even with the clutch in, so did something got messed up?

Compression check comes to 190 psi cylinder 1-3, 160psi on cylinder 4.

I wonder if I have spun bearing. What would the sound of spun bearing like?

[reza]

[benemorius]

Did you replace the oil pump? If you did, then your lifters probably just need a bit of cruising time to refill with oil so the tapping will stop.

If the noise is not dependant on engine rpm or vehicle speed then it might just be something rattling around on the exterior of the engine.

[reza]

Yes, I did replace the oil pump, forgot to mention it. I leave the valve cover open and start the engine, yes, the oil goes up there no problem.

I am afraid its a rod knock. It sounds like coming in from below, I poke around the head and it sounds like it comes from there.

this is basically like a wood hammering the block.Sometimes the noise is irregular which I thought some came loose inside the bell housing, but clutch engages fine without issue.

car also sometimes stall as soon as I clutch in, so far driven about 5-6 miles only.

I wish I can post the sound.

Is there a way to peek inside the bell housing without removing the transmission?

Reza

[benemorius]

Sadly, after having an oil pump failure it would not be at all unusual for rod knock to develop. What you might try is to pull each spark plug wire one at a time while the engine is running. If the knock stops when you pull one of the wires then unfortunately that confirms the suspicion.

There is no good way to see inside the bellhousing without sliding back the transmission with the exception of removing the starter to see a glimpse of the flywheel.

[reza]

How is this rod knock be fix?Can I drop the oil pan to access where the rod connects with crankshaft? Is it something that I can do to replace the bearing there? Maybe sleeve it?

Reza

[rogoman]

How is this rod knock be fix?Can I drop the oil pan to access where the rod connects with crankshaft? Is it something that I can do to replace the bearing there? Maybe sleeve it?

Reza

To examine the rod/main bearings, the oil pan needs to be removed. If the bearing(s) wiped, they can replaced with the proper size. There is no sleeving of any sort for the bearings.

Is the knocking sound you're getting a metallic sound or a low frequency thud. A metallic sound would most likely be rod bearings while a thud would most likely be main bearings.