Back in may of this year i ended up with a leaking lower intake gasket i ended up having a stoke while driveing bosses truck my blazer sat until this last weekend when i change gasket oil and filtergot it back together when its cold and i start the motor it has good oil pressure but when motor warms up oil pressure drops to about 20 dont want to drive till i figure out whats going on any ideas what to do not working and dont want to tear it up being stupidthanks in advance

 

its not bad to have 20psi oil pressure, these engines require a minimum of I believe 10 for every 1000rpm.
Does it go up at all when the RPM's increase?

 

Not much main concern is all the sludge sitting in there do i need to do another flush to get it back rite i took it for a spin around the block and it was trying to make internal noisewhen i say around the block i mean less than a quarter mile

 

Should i do a motor oil flush or pull pan and see if screen is clogged and its a 4x4

 

You can try doing a motor flush, but I personally have never liked them. Pulling the pan is a huge pain since you have 4wd.

 

what is the best oil flush to use because i hear that they mess up alot of other things to

 

I have always used gunk in the gray bottle! But 20psi is fine with theses motors they only need 8psi at an idle, just as long as the pressure rises over idle u should be fine

 

Not when it gets driven around the block and oil pressure is about on 0and a little motor ticking

 

Put a quart of ATF in, run it just above idle for about 45 min in park, listen to the radio.
Do an oil change and see what happens. Of coarse if you hear anything strange shut her down!

 

I'm afraid the last time I saw that well, it involved a new motor happened with mine low pressure then dropped 0psi while driving than shortly after blew itself apart have u tried to hook up a manual gauge? To test pressure.... But since u are hearing noises I'm sure it's only a matter of time!!! I hope not for your sake