The thread may get deleted as I posted it on the Hardcore forum as well. But it is Chevy motor. Anyway..

Had a slight knock before trip to Moab to test new rig. Got to Moab Thursday evening. Ran a trail or 2 Friday and cut it short as the knock got progressively louder.

Removed the oil pan and the pickup tube was loose where the flange bolts into the block at the front of the motor.

Automatically thought this was the culprit of the low oil pressure and Rod bearing failure. Bought new bearings for the rear most rods (they were both damaged) but the crank was ok. Buttoned it up and it ran fine.

Then again today after about 4 hours the knock is back. I can hear it better at the rear which would tell me the same bearings are bad again.

Oil pressure at idle is 25pds. mid-throttle is 35-45ish I can get the oil pressure up to 50+ but that is moving at a good pace. Pressure was lower but not much before fixing the pickup.

What is a safe/good pressure for these motors. I did a google search and no luck.

I will wait to tear it apart again until I get home.

WTF is going on here.

I will buy a Oil pump from Summit and put that in as well but is there more than that wrong?

Rod caps were also fine.

anything else??

Thanks.

The thread may get deleted as I posted it on the Hardcore forum as well. But it is Chevy motor. Anyway..

Had a slight knock before trip to Moab to test new rig. Got to Moab Thursday evening. Ran a trail or 2 Friday and cut it short as the knock got progressively louder.

Removed the oil pan and the pickup tube was loose where the flange bolts into the block at the front of the motor.

Automatically thought this was the culprit of the low oil pressure and Rod bearing failure. Bought new bearings for the rear most rods (they were both damaged) but the crank was ok. Buttoned it up and it ran fine.

Then again today after about 4 hours the knock is back. I can hear it better at the rear which would tell me the same bearings are bad again.

Oil pressure at idle is 25pds. mid-throttle is 35-45ish I can get the oil pressure up to 50+ but that is moving at a good pace. Pressure was lower but not much before fixing the pickup.

What is a safe/good pressure for these motors. I did a google search and no luck.

I will wait to tear it apart again until I get home.

WTF is going on here.

I will buy a Oil pump from Summit and put that in as well but is there more than that wrong?

Rod caps were also fine.

anything else??

Thanks. Sounds like an incorrect o-ring of the oil pick up tube to oil pump it my be leaking back to the pan. You may have oil pressure but not enough volume. Or it may be sucking air. Post over on Ls1tech.com. They should now more about the Gen III engines.

posted on this over in the hardcore section