parks450

iTrader: (17)

Just finishing my 6.2 swap in my 06 sierra. Motor is a 2008 non dod, with a ls2 timing cover. Short block was left alone but has new lifters, gaskets through out since a btr stage 4 cam was installed. I can't get oil pressure. I mean zero... I pulled the sensor out and it is dry as a bone, turned it over with no sensor in it and no oil. Pulled the valve covers also and no oil there either. I ran it for about a minute as well looking for leaks etc luckily I checked the oil pressure and away the had nothing so I shut it off inmediately.

Wondering where to go from here, I plan on pulling the pan and seeing if I notice anything obvious down there first before I pull the cover and pump. Let me know what you guys think.

A.R. Shale Targa

iTrader: (2)

Pump O ring torn.

saccitycorvette

iTrader: (3)

I agree with Targa. Pull pan and check pick up O ring.
Did any one mess with the rear main cover? Maybe the Barbell is missing. Just a thought since usually even if the O ring on the pick up is damaged it will still have low oil pressure.

Thanks
Christian

parks450

iTrader: (17)

I would have thought the same... but I pulled the pan o- ring is fine, no rips nothing. To be honest not sure on barbell, rear cover was off for gasket and seal. It has new cam bearings as well. Here are some pics of oil drainage from pan...

saccitycorvette

iTrader: (3)

Is that a bunch of metal in the oil?

parks450

iTrader: (17)

I'm thinking the relief valve is stuck open. Yes that is metal in every oil. Not sure where it is from though since no oil was circulating at all. Only thing I can think is I cut the tabs off the 4l80e and I didn't have the dipstick tube in. So I think some metal or aluminum gothe in through there. It was everywhere when I got done.

RixTrix

Crank bearings, checkum....

parks450

iTrader: (17)

^ definitely, won't get the chance to until next week but I am going to pull a couple rod caps and mains and check them

A.R. Shale Targa

iTrader: (2)

What about the O rings on the underside of the valley cover sealing off the oiling towers ????

parks450

iTrader: (17)

Honestly not sure what those are shale Targa? This site my first gen 4 motor and I am not the one who had it apart. Would you have a pic by chance?

RixTrix

If the oil filter is dry the pump is not pushing any oil.

Im fairly sure the metal in the oil is the "Bad Thing" [tm].

If so, I'd pull it all apart to wash it and polish the crank rather than just spinning new bearings into it.

parks450

iTrader: (17)

[QUOTE=RixTrix;19451063]If the oil filter is dry the pump is not pushing any oil.

Im fairly sure the metal in the oil is the "Bad Thing" [tm].

If so, I'd pull it all apart to wash it and polish the crank rather than just spinning new bearings into it.[/QUOTE

I will definitely check it, at yhis point I don't think it was but I will check. Going to pull a few caps and mains to see if it's from them. I am preying it isn't but I'm not getting my hopes up with the amount of shavings in the oil.

A.R. Shale Targa

iTrader: (2)

Here you go

grubinski

I had to buy an engine priming kit and prime my crate engine the first time I started it.

RixTrix

If you put some Vaseline in the oil pump gears before you install it it will always pump oil right away.

ImprovedRacing

Whatever you do, I would pull the fuel pump fuse next time you turn it over so you don't start the engine without oil. It will also allow you to prime the oiling system before starting it.

Sounds like the oil pump isn't pumping anything. In every other scenario you would at least get a little bit of pressure. Is it a new pump?

parks450

iTrader: (17)

I did that in the beginning, no luck. I have done it is the past to and it didn't register until it was started. No its not a new pump, came with the motor has 80k miles on it. Bought It from a guy I know and told me it was a running engine. Come to find out he just took someone else's word and didn't hear it run.

parks450

iTrader: (17)

Well took a few rod caps off, All good so far. Will do rhe rest tomorrow along with the main caps. Bearings also had a good amount of oil on them. I could see the cam lobes as well and they had oil dripping off them. So i gues the oil pump is working? What could cause no oil to get to the heads?The oil filter was full as well.

I'm stumped at this point.

A.R. Shale Targa

iTrader: (2)

Pressure is resistance to movement
If those lifter towers are not sealed off
There's a HUGE leak. Everything is being supplied
With oil but with no pressure. Thumb on the end of a garden
Hose scenario........

parks450

iTrader: (17)

Gotcha, I'll check those first thing before anything.