bojangles

I can't find my old thread...... But I have my '13, 427 Vette in the shop.
My current oil pressure readings are:
start up cold: 55 psi
temp warmed to 210:
2000 rpms in 1st gear: 47 psi
1600 rpms in 4th gear: 37 psi
1300 prms in 5th gear: 25-27 psi
at idle 700 rpms: 11-12 psi
Is this normal?? I'm getting frustrated but if it is normal... I'll get over it.
Thanks

EVRose

I don't have a 427 but for my LS2 those are all normal except the 11-12 idle. I'm in the mid to high 20's for that.

TxLefty

I don't have a 427 either, but those numbers look reasonable and compare generally with any modern high performance engine I've been around.

ATC399

Over 7400 miles on my 13Z and I have never paid any attention to the oil pressure

NotVincent

Those are only slightly higher than mine before my engine was replaced due to an issue with the connecting rods. Best you take it in to your dealer ASAP.

qwknuf6

all the readings look low , my 2013 Z06 hot idle oil pressure is 25 to 30(600 rpm) , cold start is very high (80????) , cruise oil pressure is 53-55 (1200 to 1400 rpm ) when warm .

NotVincent

Those are exactly the same readings I have now on my replacement engine.

TxLefty

I did forget about the dry sump set-up and that could make difference. My cruise pressure on a wet sump LS3 is a little over 40 psi.

red4twenty7

hey neighbor are you going to be at Mystic lake vette show this weekend?
here are my readings for my 427 vert, this is at full warm up after 15 minutes.
idle is 28psi
5th gear driving 55-60 57 psi
6th gear driving 65-70 52 psi
I just turned 2900 miles on the beast

Trotter

My 427 has 4800 miles. I have not tracked the higher rpm PSI's but when I have glanced over, I think they are a little higher than yours. Where my concern is hot idle. I am consistently between 18-21 PSI. Add to that I have the same slow crank that others on here have stated (only when the engine is hot) and a slight miss at idle. My gut tells me I might be headed for issues.

For those that have had their engines replaced due to low oil pressure, did you also have the slow crank when the engine was hot?

American Heritage

the idle pressure is way low... What pump are you running? what are your bearing clearances set up at?
what the oil look like, shiny/glittery?

bolivar

Most cars with oil pressure 'idiot' lights will turn the light on at under 5 pounds. I think the pressure is fine.

Too-Fast

To the OP: I have a 2011 Z06, I live in Houston. In 98 to 101 degree ambient temps, my oil pressure never drops below 30psi at idle and I see 70-80 psi at the higher RPM's. I would be concerned if my oil pressure dropped as low as you are experiencing at idle.

pickleseimer

I bought my 427 vert new, and with info on this forum I'm aware of oil and oil pressure related issues. Some of those on the forum who have had issues requiring a trip to the dealer have reported that the pressure pattern changed before the engine either made noises or seized. My takeaway on those observations is that if the oil pressure pattern changes for no good reason then you may have problems in the near future.

Mine since new shows 70-75 lbs on cold startup (oil temp 70 degrees). After warming up to 195 degrees, 2000 rpm and higher shows 50 or above depending on RPM, 1400 rpm pressure is 45, and hot idle is 22-23. I believe the service manual says the lowest normal pressure for this engine at hot idle is 7 lbs (I'll have to check that when I get to the shop). Engine makes no noises. Hot starts have always shown a slightly lower cranking speed but you have to be watching for it to notice - I've guessed that this may have more to do with the pistons being tighter in their bores when hot but I may be whistling in the dark as I'm not sure if this has anything to do with it.

I did the first oil change at 1300 miles. Now with nearly another 1300 miles on the car it will be time to change again and I'll be looking closely at the drain oil and maybe sending it off for analysis. One thing I do notice is that the oil is cleaner on the dipstick now at the second 1300 miles (still golden color on a white paper towel) than it was on the first 1300 miles - kind of expected I guess but not very indicative of anything unexpected. I check the pressure a couple times each time I drive the car and don't stress over what may happen. If I see a change in these pressure patterns, then its off to Bud's.

jovette

Just got back from driving my 427 to warm it up so I can change the oil. I have 13,600 miles on it, and @ 196 degrees oil temperature, my idle pressure is 21 lbs., 37 lbs. @ 1,000rpm, and 52 lbs. @ 2000rpm. Cold idle pressure is 70 lbs.

LMB-Z

I have an 06 Z06. My oil pressure on a cold start is 70-80-psi. After warm-up, idle pressure is 40-50 psi. I think yours is low.

crAzy

My LS7 in my 06 Z runs around 23-24psi I think around 700-800 rpms. Every 10psi per 1,000 rpms is what is said in the manual that is safe.

pickleseimer

The 2013 FSM, page 9-590, specifies the following minimum oil pressure with the oil temp at 212 degrees F for the LS7:

24 psig @ 1,000 rpm

35 psig @ 2,000 rpm

38 psig @ 3,000 rpm

The FSM states that these readings are taken with the EN-21867-16 adapter and EN-21867 pressure guage, or equivalent.

wrh3

My car has ~500 miles and these numbers are what I see.

bojangles

Thanks for all the comments.
I'm going to keep 'hounding' the dealership. I have purchased 12 vehicles there in the last 10 years
Bojangles