AdsoYo

iTrader: (1)

I'm getting ready to start my new LS3. I primed the fuel pump to check for leaks, then unplugged the fuel pump to crank the engine and build oil pressure. I forgot to disconnect the coils so after about 1/2 second of cranking it fired right up. I immediately turned the key back off. On one hand I was absolutely stoked that it started so easily. On the other I'm worried that split second of run time with no oil pressure may have caused harm. I disconnected the coils and cranked again for maybe 10 seconds and it built 40 psi of oil pressure. Would any of you be worried about anything?

showdog75

iTrader: (8)

Send it

QwkTrip

iTrader: (23)

It is what it is, you can't change the past. Have fun with your engine. They install a bunch of lube, it wasn't completely without lubrication.

RevGTO

iTrader: (12)

Per above, I think you'll be fine, but the fear of doing damage is why you prime the pump before cranking.

Rich-L79

Not a lot of difference in cranking without starting to get oil pressure vs. cranking and starting to get oil pressure. What do you think happens when you start the engine after an oil change? A few seconds of no measured oil pressure then fine. There is enough oil and lube on things to compensate for those few seconds of no oil pressure.

LS1-IROC

iTrader: (4)

You are fine, I wouldn't worry a bit about it, just don't make it a habit.

Che70velle

iTrader: (6)

Every new vehicle at GM is started dry. No priming. Oil filters are dry. Oil in pan only. As mentioned above, it’s pretty much as such after an oil change, unless your prefilling your filter. This entire pre-lube an engine deal has gotten way out of hand over the last many years. If we are discussing a $100k dry sump endurance engine that is designed to go 600 miles, then that’s a different discussion, but for a run of the mill street engine build, pre-fill the oil filter and start it. You’ll see oil pressure in a couple seconds. Assembly lube is there for a reason.

rpturbo

iTrader: (47)

I'll say this. This year, I was involved in building a L33 for a guy. For whatever reason, the machine shop took the front oil galley plug out, and didn't put it in the box, so I didn't realize it was out. (He has never pulled them before on several other engines I've had done). The long and short is, that car was started probably 8 times, with assembly lube, and it was pre lubed once, before the issue was figured out. It never ran any crazy amount of time, but none the less it was ran.
That same engine was pulled because of another issue later in the year, and the bearings looked really good in it. As said, assembly lube is there for a reason, and they build oil pressure so quick anyway (when the plug is in) it's really not going to hurt anything.

pdxmotorhead

FWIW,, pre filling oil filters is not always better, it can trap a air bubble in the galley and filter between the pump and the engine.

If you've ever blown off an oil filter you'd know ,, the time it takes to move oil is faster than most imagine,
and there is a LOT of it when it leaves in a 50+ PSI spray pattern and you have to clean the engine bay..
Mine emptied the crankcase in about 30 feet at 50 mph. (nissan truck) Luckily the noise of it hitting stuff
was so loud I instantly turned off the key and got the clutch in.

When I was installing my l33 I just tipped the engine on the stand, on the passenger side and took
the big plug out of the oil galley on the driver side up front, and poured it full of a quart of oil and
put the plug back. On my first start I had 50PSI on the gauge as soon as it fired.