LSxChevelle

iTrader: (4)

Well B-Rad2's oil pressure randomly dropped down to near red on the gauge so we installed a new LS6 oil pump (unported) today. Fired the car up and it went to 40 psi and higher when revved. Went for a quick drive and lost oil pressure. Wtf? What needs to be checked first? The pick up tube seemed to seat in the pump nicely and no other things seemed odd. Any ideas??

Ackattack1

iTrader: (7)

maybe the gauge is bad?

TwoFast4Lv

iTrader: (8)

I would have to say put a real gauge on it. I have seen it happen a few times where the gauge or sending unit freaked out.

If those check out there are a few areas deeper to look at and none of them easy while the engine is in the car

smokinponcho73

iTrader: (6)

when rod bearings go dont you loose alot of oil pressure?

WAHUSKER

iTrader: (4)

That's weird! Is it rattling like it really has no oil pressure Jason?

B-RAD2

It really doesn't sound bad. This started after i got it tuned. the oil prssure is fine at start up(when cold) but it drops once i get up to normal temp. On my way home last night driving down the freeway it was just under 20psi. When i stopped at a red light it dropped to just over the red.

Ellis- are you thinking about cam bearings??? I only have 40k on the motor

firehawk618

iTrader: (14)

Sounds like the oil pressure sending unit.

Do like ellis said and put a regular mechanichal gauge in and take it for a drive.

At least eliminate that possibility. Seen many factory sending units act glitchy and do things similar to what you're describing.

smokin_powerstroke

I hate to say it but when muff daddy had the 408 built that is now my car he had the same issues. Turned out that the original builder didn't check the line hone on the block and that caused the main bearings to go bad

TwoFast4Lv

iTrader: (8)

Brad lets get the gauge on it and see where that takes us.

KrautBurner

iTrader: (5)

we don't talk like that

B-RAD2

Ok so i need to pick up a gauge then... Just get one from the auto parts store???

smokinponcho73

iTrader: (6)

Im pulling my motor this weekend, thinking its a bearing

muff daddy

iTrader: (10)

guaranteed its the mainbearings. mine acted the same way. i just hope your crank is salvagable.

B-RAD2

i'm still getting oil up top

99blancoSS

iTrader: (115)

not another sick engine! sorry to hear