Lower oil pressure

Hello forum, I tell you that my Chevrolet Pick Up S 10
has me with doubts because the needle of the oil pressure almost to zero and the compression also goes down enough so far I made a change of oil and filter is the only symptom since the engine does not heat up and turn on to the first one does not tremble or take too much smoke. I ask if you have any idea how to check that fault
greetings and thanks

You have to lower the carter because it is entering air now testing by raising the truck x the front well high then enclose it if the precions go up is that it has a leak x the oil or pump collector but it has to do if placing it so you follow the fault you have to see the horn of the lift tree

Do you have to notice 2 things to determine your problem
1. When you see that the needle falls to zero. Does the aiming begin to sound?
2. When the pressure falls to zero, at that time removes the plug where the oil is thrown into the engine and observes whether the oil is splashing or not.

If the aterns sound or if it stops splashing the oil then your problem is actually in the lubrication system.

Perform these tests and comment on the results so that we can continue to help you.

Hello Argo if you have an oil precion clock as you take the measurement of it if it is by Teflonada Manguerite or copper pipe: To know if the pump at the pump is throwing something unscathed with the connection of the same and that someone to start if the pump works correctly should throw a good oil stream (cover with a cloth)

Well it sounds logical I will do the tests you recommend and I will give you news