93 4.3 /w oil pressure guage/oil pump..somethin else?

[BlazinUP]

hi.....
iv got a 93 s10 4.3 w..141k..runns perfect...no bad sounds at all.
sounds like it should wether at cold start up or warm.
at start up the oil pressure guage is at about 50 at idle....
after it warms up it will fall to 10-15 at idle.
while driving the guage showes 30-40.
what im wondering is....why such the flux in reading@ different temps?
iv seen some guages that never go below 40.

anyone else have this happon?
is my oil pump.....guage bad.....i could use some help....PLZ
im running 5-30 castrol synthblend....if that helps.

thanks

[rochma3]

my 95 runs at about 15 to 25 at idle and at 35 t 40 while driving and dont have any problems

[rlith]

Your gauge sounds normal but the analog gauges on the 1st gens arent the greatest.... Look into replacing the sending unit (about 8 bux) They go bad as a matter of course... I have the same engine as you, typically it runs at 60 while cold, then drops to 20-25 at idle...

[BlazerLT]

Originally Posted by BlazinUP

hi.....
iv got a 93 s10 4.3 w..141k..runns perfect...no bad sounds at all.
sounds like it should wether at cold start up or warm.
at start up the oil pressure guage is at about 50 at idle....
after it warms up it will fall to 10-15 at idle.
while driving the guage showes 30-40.
what im wondering is....why such the flux in reading@ different temps?
iv seen some guages that never go below 40.

anyone else have this happon?
is my oil pump.....guage bad.....i could use some help....PLZ
im running 5-30 castrol synthblend....if that helps.

thanks

Completely normal.

Cold oil = thicker = higher pressure

Warm up = thins out = lower pressure.

[BlazinUP]

i figured as much....again...as the engine never knocks or makes lifter noise etc.
ill get that sender looked at.....
and the cold thick oil...warm thin makes sence.

thanks for the input all

[BlazerLT]

There is nothing wrong with your sender, don't replace it.

It is sensing properly, why are you going to swap it out for?

Common sense bro.....

[BlazinUP]

i was wondering.....were the first gen guages...
faulty/inaccurate in some way?or just poor in quality.

then again teh truck is a 93....guess i should just be happy theres no noises...and the guage seemingly works.

[BlazerLT]

All sending units are prone to failure in any year.

You only replace them if they are faulty. Some go for the lifetime of the truck, some last maybe 50,000miles.

[s10blazerman4x4]

i have a problem kinda of what he is saying
in my 91 rite around 1000 a miles my oil gauge will drop from rite around 40 to 0 even though the stick says its in operating range and if you had the quart it goes back up to 40 would this be the sender

[BlazerLT]

No , that is low oil level.

[s10blazerman4x4]

but still why if it is good on the stick because it is high in the operating range would the gauge read zero and be flucuating like making a turn equals zero then straiten out your up around 20-40

[rlith]

Either weak pump being affected by sloshing or bad sending unit. Replace the unit and see if that works (only 5 bux)

[BlazerLT]

Good luck getting to it though, it is a bitch to reach.

Make sure you have a good assortment of tools.

[s10blazerman4x4]

for what the sending unit is it gonna be fun to do i was thinkin it might be that because my that guage always seem to be wantin to mess w me because you would think if the stick is well in the range it would translate