silvrhand

Well expensive weekend for me..

- car oil pressure dropped
- oil temp started to rise..
- and rod started knocking..

Oil looks like graphite.. joy.. Car was 2 quarts low on oil, and I don't have a leak looking for suggestions on where the oil went.. underneath the car is clean as a whistle..

- John

Durien512

damn.. sorry to hear man.... is there oil in intake, TB etc?

If its not leaking then in theory it was eating it right?... ( or was low period during a change obviously)

LMB-Z

More information needed. What were you doing just prior? Recent oil change? Miles on car? Year model? Mods?

Too-Fast

If not leaking oil and level was correct, then it had to have been ingesting it, rings or valve guides. Where you seeing any blue smoke on first start or while running?

silvrhand

yah it was either low on change, or when I pull it apart I'm going to find massive leakage somewhere internally past the valve guides or something else.

MTPZ06

Is the car an '09+ with 10.5 qt dry sump?

jb78L-82

More going on here than 2 qts down in the dry sump whether 8 or 10.5 qt capacity unless the car was on a track at 6-7,000 RPM. Even 2 qts down on a 8qt Z, just driving down the road would not spin a bearing causing the rod knock. The engine would have to be close to out of oil for the low oil to fry the engine.

blkbrd69

Bummer;
If an oil pump dies it can pull from tank but not scavenge back to tank, oil can be in sump. It will hold the entire tank. Pull sump drain plug with a clean big container.

jb78L-82

This suggestion seems very plausible...oil pump died....especially with dropping oil pressure and then rod knock.....

rio95

When's the last time you checked the oil level? 2 quarts would not be unheard of on these cars if you were toward the end of a change interval and beat on it a lot. I agree though that it doesn't seem like even 2 quarts low on your car would matter unless you had sustained g load.

njk4o5

this is impossible ls7's only die from dropped valves

Mr. Jean

Yup, sounds like you lost a pump. Sorry for your loss.

silvrhand

Some progress..

- measure the amount of oil drained out of the car.. 4 quarts, this was after I put 3 quarts in it when the rod started knocking.
- oil is like graphite, and has sparkles in it.
- top of engine is good had oil covering the heads..
- pistons look good other than #2 you can twist it in the cylinder right now, rod bearing looks gone.



oil should not be sparkly





















oil is more like graphite..

Brandon619

Funny comment, not a funny scenario hopefully that it's something simple but it sounds like a motor build. This is your excuse to build a stout motor?

colten79

Well at least you're not buying a complete different long block, so it could have been a lot worse..

MTBSully

damn. So essentially you are saying the motor had 1 quart of oil in it?!

silvrhand

Still don't know what caused the rod bearing failure but it's pretty obvious it failed, luckily I just dumped the clutch and pulled over and killed the motor before it got much worse...

Les

Wow, that was hammered! By using your head you saved yourself a major heartache. Well done, and good luck putting it back together.