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Long story short…
I developed this noise yesterday.
Little history on the car.. has 109k on the body, 8k on the motor. it has a junkyard engine with a remanufactured head on it, that i did last march. It has about 8,000 miles on it now and has run perfectly. No misfires, check engine lights, surges, stalls.. nothing. not even a single leak!
Yesterday I came across this noise. it’s very intermittent. It went away completely for an hour, and then this morning it was back for about 3 mins and went away until it warmed up, and then i took the following video.
http://www.youtube.com/watch?v=djeZy84lw_k
You can hear the worst of the noise around 2:30 and its pretty much staying all the time now.
I’ve tried for hours to find this noise.. i have the timing cover off, serpentine belt off, ive checked the water pump, timing belt tensioner, behind the inspection shield at the flywheel, under the boot to the clutch fork, put my stethoscope at the oil pump and every place i can reach on the block.
i’ve checked the oil multiple times on the dipstick, drained the oil and sifted through it with no metallic particles of any kind. Havent cut the filter yet, but i dont see anything worthy of doing so. I pulled the lifters out from the head, and they are perfect.. no camshaft scoring and no metallic wear. Oil pressure is reaching the top of the head.. i ran it without the valve cover on and oil sprayed everywhere.
My next step is to drop the pan and check for a loose rod bearing or anything making metal to metal contact. It is definitely engine speed/rotation related. But it has me stumped because it comes and goes randomly. The car runs perfectly otherwise. All plugs are clean and no damage. It’s not a dropped valve seat.. already played that game. that’s why i changed the engine last time. lol
Any other suggestions? Its definitely something rubbing/hitting metal to metal.. i want to think its a worn bearing, but without looking i cant tell. Its the only thing i didnt change with the junkyard motor.
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Quoted From WOTStang:
I thought that too.. I pulled them out and even ran the car without the rocker arms and lifters installed on #4, and the sound was still there.
A broken valve spring is likely. I’ll have to pull the valve cover and check it again. I dont think its oil starved on the top end, i can only run the engine for about 20 seconds before covering everything in oil with the valve cover off.
I hope it is a spring. Another thing that comes to mind for them 1.9 and 2.0 S.O.H.C. engines is a valve seat that is moving. Been there also. If that is the problem, when she lets loose time for another complete engine swap.
One 1.9 I had, started missing like a bad plug, and or wire. Changed them and ran fine for a few days, then started missing again. Thought maybe injector problem. Came and gone for a few weeks and then grenated the cylinder. Although,I do not remember hearing that noise before that happened. Just remember that noise from bad lifters, good luck.#4 looks like it’s burning some oil but your description and video suggest there might be something loose inside the engine and given it’s history you may be looking at a replacement, I don’t know if I would bother with an engine that’s already been pieced together but if money is a factor I can understand why you would want to fix the one you have however if the rings are also worn and you need to do some machining to make it right then you may end up spending a lot more to try and fix what you have properly.
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