ZYUL8r

Gosh...I am having this problem on a New 2012 C6 with 4500 miles. Could the oil pump really be bad? wow

The pressure is at zero on startup...its not noisy...but once i give it one solid rev to 3k or so the oil pressure pops right up to 40 or so...If i do not do this my oil pressure just sits at zero..however i do notice my oil pressure at idle is between 13 to 18 psi....hmmm...geez i really would hate to take my car to the dealer.

Also if i shut the car down...then start it right up the oil pressure is fine...but if i wait longer than 15 min or so it starts up at zero. Wierd...I waited 10 min once and it was fine....don't understand that.

I hear it's a tough job and not far away from the same tear down that a cam swap would take.

Well any ideas before i take it to the dealer tomorrow?

Found this thread in a search:
http://forums.corvetteforum.com/c5-t...post1580895198

SG4206

My guess is the sender unit ; not the pump.

taken19

Has the car been torn apart? You haven't done a cam swap, timing chain or oil pump upgrade, right? If so, I would suspect the pick up tube o-ring.

If the car is stock, most likely the oil pressure sender as stated above.

08VRZ06

Take it to the Dealer..... Its still under warrenty so let them deal with it.

Mark

JCtx

If bone stock, and just started doing that, it's probably the sending unit or gauge. If DIC digital reading is the same as the gauge, then my money is on the sending unit too. If it was my car, and the part is not too expensive, I'd change it myself due to my distrust in service departments. But I know the best thing to do is to take it in and let a dealer find your problem. I'd, however, wrap the crap out of my car everywhere, to avoid stains, scratches, scuffs, and any other such thing that of course was there before if it happens . Good luck man.

Luv2Fly

I would let the dealer fix it. A quick test to see if it is a pump or sender is take off the oil fill cap and look in while someone starts the car. If you see some oil splashing around you know the pump is working.

iluvmyc6

as others have said, it's possibly the sending unit.

Other possibility is the o-ring on the pickup tube may have been torn on installation. it is probably 1 of these 2 issues.

ZYUL8r

So I took my car out to the dealer this morning...
(Yes the car is completely stock, and never opened up)

I turned it on...oil press was 0

I let it idle...it was starting to get noisy
and then the pressure jumped all of a sudden and it began to sound normal.

Drove it fine with no issues, cold oil, high pressure.

Asked the dealer to do an oil change....i changed it at 1500 mls...now it has 4900...and they are going to look at the OP sender tomorrow.

So far the dealer has been quite nice and helpful.

I cringe and taking my car to dealer service departments, i've never had a good experience with any service dept. anywhere...I usually do all my own work.

Hopefully this is different. Thanks for the replies, they gave me peace of mind as i drove it 15 miles to the dealer.

Will post updates soon.

bud miller

compare guage with the reading on your DIC...or HUD both can show oil pressure...and see if all the same...might indicate its in the guage not the pump..

ZYUL8r

yeah DIC and guage are reading the same. So maybe its the sender...but letting it sit at zero and hearing noise...eeesh...i mean it didn't get loud but it seemed like it was about to...but then the pressure jumped up and quieted it down.

taken19

That would make me worry as well. Especially if the noise goes away when indicated pressure goes up. Press the dealership to look into that. Otherwise you may have bigger problems later.

Gearhead Jim

If the oil press is 0 at start but jumps up a while or after you rev the engine, you could have a sticking relief valve.

08VRZ06

If it is noisy when the oil pressure is at zero and then gets quiet when there is an indication of oil pressure, then my guess would be that you really don't have any oil pressure.

I would bet a sticking pressure relief valve........

Mark

JCtx

THAT is a totally different picture man. Forget the sender or gauge. You have an internal lubrication problem. I'm not that familiar with the lubrication system on this engine, so can't comment on that. But a sticking pressure relief valve makes sense to me. I wouldn't use the car other than driving it to dealer to get fixed. Looks like the oil pan has to come out. Hopefully an easy job. Good luck, and please keep us posted.

ZYUL8r

Ok so after reading all these great posts i decided to call the dealer, as they were pursuing an issue with the sender, and I saw the notes the service tech wrote down, and he didn't note the part about the noise.

Turns out that (while i don't know how true it is) that he was about to call me (really?) and before i could tell him my concerns he told me i needed a new oil pump, and that he was sorry but it would take a week to get my car back. (GEEZ) I know its a big job....but then i started getting stories about tools needed at other chevy dealers...yadda yadda
...really standard dealer verbage...

I just interrupted him politely and told him just make sure the job is done thoroughly and done right and i'll be happy...

Soo a very major service at about 5K.....BUT im lucky i didn't kill my engine before noticing....(I've went through a dealer engine replacement with my 370z due to catching about 60% water in the fuel..WHAT A HASSLE!)

I may have had this problem a long time before...because pretty much everytime i start my car i give it some gas while the guages are spanning ....doing this would hide the problem...because the car has to sit at 0 for a few seconds before the chime.

I just so happened one day to start the car without gasing it and got the chime for low oil pressure...

Im assuming the relief valve is for the oil pump and that the replacing the oil pump replaces the relief valve. Is that correct?

Dirty Howie

I would be very concerned that you have some internal damage from the multiple starts with no oil pressure. Ask them what the noise was. Ask them to verify that there is no damage of any kind. Not sure how they would do that. Have them verify that your oil pressure is good.

I would be asking for a new motor ........


DH

ZYUL8r

I know the noise was valvetrain clatter as oil wasn't making its way up...but before it could get too loud the pressure came on.

Synthetics kinda stick to parts better...so im sure my engine is fine....

I know exactly what a oil starved engine sounds like....and it doesn't last long.

It never got to that point. But we'll see....updates soon.

Dirty Howie

Good luck. I started up my C5 one morning to let it warm up. Went in the house. Came back a while later and noticed there was no oil pressure (oil pump malfunctioned). Needed new engine


DH

fnsblum

I would send an oil sample to Blackstone after the repair is done before the oil is changed. Later! Frank

tjwong

Why would it take a week to do the job. Its a 4 hour job at best and thats if the guy is real slow, the pumps are usually in stock at their regional GMSPO warehouse which in my case is Reno NV and is only 2 days away.