OBS Oil Pressure

[Chris.G.Jr.]

ok so my truck has always done this when we first bought it we replaced the oil pump and the pressure gauge reads about 60 when driving but when stopped at idle it goes down close to 20, sometimes its a bit above and sometimes the needle bounces at idle.
Is this normal? or what should it be reading?

under throttle not going uphill

this is stopped at idle

thanks

1995 chevy silverado 5.7 tbi

 

[Keeler]

Looks fine to me.

Sent from my teepee

 

[Chris.G.Jr.]

thats what im hoping i just didnt quite know bc my parents 03 yukon xl with 5.3 doesnt do it nor does my buddies v6 2000 silverado

 

[Ginger]

its perfectly fine, at first fire up the oil is thicker, making more pressure.

should start around 60, once your warmed up, mine was always around 20 idling, and 40 when on the gas,


rule of thumb, you want 10psi for every 1000rpm

 

[Tylers88]

My OBS will idle at 40 PSI cold and run at 60-70 PSI when the oil is cold, once everything is warmed up it will idle at 10-15 PSI run at 40 PSI under light throttle and 60 under heavy acceleration. You are just fine, in my experience, the LSx engines seem have a little higher oil pressure than the old gen I small blocks.

 

[SamCarroll]

exactly how mine is. 20 idle/40 gassing. 50-60 cold start

 

[Chris.G.Jr.]

weird thing is tho after i start it and drive it for a while it does go down between 40 and 60 (closer to 40) when cruisin but when i give it the least bit of gas itll jump up to round 60 is that weird? or is it just bc its under throttle?

 

[Ginger]

it will jump up under throttle because you are making it pump oil harder because of increased RPM

 

[2005_Silverado]

yup, oil pump is engine driven, so the higher the rpm, the more/faster its pumping

 

[Hunter.]

My Zr2 does the same thing.

 

[2005_Silverado]

my NBS does too.

Del taco run - YouTube

 

[Moore]

if your truck does THIS

you should be worried LOL

 

[Chris.G.Jr.]

used to have that problem before i replaced oil pump lol bish wasnt getting shit worth of oil pressure

 

[Jared]

ohhh lawdy muhleek

 

[Chris.G.Jr.]

was waitin for him to comment lol

 

[Ginger]

could also be the oil pressure sensor. just a thought. for malik,

yours is perfectly fine chris

 

[Chris.G.Jr.]

this would be normal correct?

and a question i put some of the ac stop leak stuff in the system and while my truck was running it kept idleing up and the oil pressure would rapidly go up and down and the ac compressor would be spinning then all of a sudden stop for a sec then start spinning again

 

[Ginger]

yes that pressure is normal. how far would it move the rpm's change a little when the compressor kicks on and off. that ac stop leak is garbage would have taken it to a shop with a ac machine and have them look

 

[Chris.G.Jr.]

yes that pressure is normal. how far would it move the rpm's change a little when the compressor kicks on and off. that ac stop leak is garbage would have taken it to a shop with a ac machine and have them look

it would only jump 1-300 but i had it in a shop and the guy said the compressor was leaking and i figured thats what needed to be replaced but now im not to sure whether or not thats the only thing that needs replacing or not...

 

[Tylers88]

yes the compressor shuts off and starts back up, it cycles the compressor to regulate pressure in the system. that stop leak shit sucks BTW