Argess

I havn't figured out why the loss of oil pressure yet, but here's the history:

1/ oil light came on
2/ driver continued on for a few miles until engine seized when he idled down
3/ pics show 2nd rod bearing babbit seized to crank (I can polish it !!!...maybe....). Bearings had spun...tangs gone
4/ oil pan was full of oil
5/ oil pump tested by hand and pumps fine
6/ oil pump driveshaft intact
7/ installed oil pump drive shaft from underneath. Would not turn, so cam sensor seems OK. Turned engine by hand, and oil pump driveshaft turned properly
8/ oil filter was last part removed....comletely empty...no oil.....not a drop....very weird.

I'm wondering if there are any press-in plugs in the oil galleries between the oil pump and the filter, but I still suspect the cam position sensor as my only test on it so far was pretty Mickey Mouse.

Any ideas what caused the loss of oil pressure?

jwko

Have you pulled the camshaft synchronizer assembly and looked at the gear? Assembly could have seized. Broke cam shaft maybe?


*edit

Missed this when I first read post.

Argess

I've found out more. I checked 4 of the 6 rod bearings and all are bad....most are spun....some rod journals are beyond a simple clean-up. However, all main bearings are like new.

The cam synchronizer is perfect as well as the cam gear teeth. It's all starting to look like the engine was over-revved, a rod bearing let go, and then the oil pressure dropped causing the other rod bearings to go.

A few pointed questions to the driver, and it turns out there was an over-revving condition a little before the idiot light came on. Apparently the transmission was set to "Low" to see if the front tires could be spun and the revs got a little high.

So does that make sense, ... mains OK, rods all gone, and due to over-revving?

Unless I find something up top broke and allowed the oil pressure to drop off, I'd say it was due to the over-revving. 16 year olds.......smart enough, but don't always use the brain they've got......tough to be a teenager I guess.