i have a 93 trans am lt1 my oil psi is 50 55 sometimes when engine gets hot drop to 30 psi if i step on the gas my dipstick pops out and oil comes out i change the pcv valve and the same thing oh and if i turn on my car and leave it on for like five min i take the dipstick out and a lot of presure come out .

 

Excessive blowby on the rings is the common cause. But there is no reason the system should hold pressure for 5 minutes after you shut it down. When the system generates more blowby than the PCV system can handle, the pressure should vent through the rubber hose that connects the passenger side valve cover to the throttle body.

Are you sure you have the PCV valve installed in the correct direction? You don't have a S/C, do you?

The pressure in the crankcase has nothing to do with the oil systems operating pressure. Oil pressure is measured in the passages in the block. The crankcase pressure has nothing to do with that. It is supposed to operate close to ambient atmospheric pressure.

 

yes i installed my pcv valve correct my car has been heating up lately to.i been told that maybe i have a blown head gasket...my car was fine ontill i change my optispark

 

Replacing the Opti, assuming you indexed the splined shaft correctly to the cam sprocket, and got all the plug wires back on the correct terminals, will not:
-cause the engine to overheat - how hot is it getting (in numbers)?
-cause the head gasket to blow - why do you think it is blown? Symptoms?
-cause excessive pressure buildup in the crankcase

How long ago did you replace the Opti? Why did you replace the Opti? Did the engine start and run smoothly after the Opti was installed?

Is the engine modified in any way, or is it totally stock?

Let the engine idle. Take the oil fill cap off, and hold your hand over the fill tube to see if you feel air puffing out of the fill tube. Then listen at the fill tube for a "chuffing" sound.

Is the hose from the passenger side valve cover installed correctly, with no kinks? Is it connected to the correct nipple on the side of the throttle body? With as much pressure as you have, the plastic elbow would blow out of the valve cover, or the hose would blow off the throttle body. You did put the PVC valve on the driver's side of the intake manifold, and not in place of the plastic elbow on the valve cover?

 

it will heat up almost to the red 250 but i turn it off before it gets there.
i change my optispark 5dayt from now cause my dad wash my engine when i wasent here and he dident know he wasent sopose to change opti started right up... stated heating up after i put it back it all back together.
i used my car today dident heat up but i just droved it like 3-5 miles dident use the hell out of it.

ill do a vid and sent u the link so you could see what it does
ill try the things you told me to do tomarrow

thanks for the help

 

the overheating could be an air bubble in the system, did u properly bleed the radiator after reinstalling the water pump? as for positive crnk psi... pcv or vacume lines not hooked up corect?

 

i did what you told me to do i put my hand on the valve cover hole and it puffs air out if i hold my hand there for a bit and relese it it blows lots of air out...wat does that mean

 

It means you have some serious compression leakage into the crankcase. I would do a leakdown test as it is probably getting by the rings.

 

and how do i do a leakdown test

 

Rent a leakdown tester from an auto parts store, and follow the instructions. If you are totally unfamiliar with a leakdown test, have a reliable shop perform the test.

 

Easily found with Google.

 

if some thing turns out to be bad what part(s) am i looking at and how much $$$$$ am i looking at to repare

thanx

 

If the cylinder seal is shot, you are looking at a complete engine removal and teardown. What is needed is dependent on what is found. Could be very pricey if you don't do your own work.