Engine Noise, oil pump, balance shaft?

[tyhoppy]

Ok. I bought a motor used off of a guy and replaced the balance shaft and timing belt. the first time I started it up it made a noise like a lifter or valve or something. I replaced the lifters and it still made the noise. So, I did a compression test and it has good compression all across the board. I took the timing cover off to find the balance shaft belt was broke. I pulled the old belt out and started it up to see if it still made the noise and it did. Took off timing belt and when I turn the oil pump pull back and forth it kind of makes a noise, but only when I slightly move it back and forth. The noise got louder until around 3,500 rpm and the got real quiet. Please help. Also, how do I know if my oil pump is bad? and I'm thinking i'll just remove the balance shafts while i have it torn down this far. Any and all help is appreciated. thanks alot.

 

[HIGHPSI4]

You may have spun the oil pump balance shaft bearing out. Pull the oil pan and give it a look. You will need to pull the pan to pull the oil pump anyway.

 

[tyhoppy]

Just want to make sure... will main bearings make noise? I didn't think they would... Should I change the main and rod bearings while I'm in there or not? I have no idea how many miles is on this engine...

 

[havoc742]

If it was rod bearings it would do it all the time, or at least it did on my 2G 7 bolt and the 6 bolt I put in it.

You may have spun the oil pump balance shaft bearing out. Pull the oil pan and give it a look. You will need to pull the pan to pull the oil pump anyway.

+1

 

[tyhoppy]

I know rod bearings get louder when you rev it up. But I asked about mains.