Mazda protege white smoke from exhaust

[a58]

I recently bough a used Mazda protege 2003 FS-DE 2.0L non turbo (150000miles) with what I tough was a blown head gasket. The car blew white smoke out the tailpipe and was low on power and couldnt rev above 2000rpm.
So I took the cylinder head apart and found an oily substance which I assume was motor oil. The intake and exhaust was full of black oil. The cat converter was clogged with burned oil so I replaced it. The intake valves looked cleaned but the exhaust valves were full of oily cruddy carbon deposit. So I pressure washed the head and cleaned it. I also relaped the the valves and replaced the valve seals. I cleaned the EGR vavle. And put the cylinder head and everything back together.

When I started the car the smoke came back but the power was restored because I replaced the cat converter. Upon further inspection I removed the spark plugs and found a layer of oil in all 4 cylinders. Oil is also barely making it way to the cam shaft. I tried doing a pressure test but receive what I believe to be false reading. 70 130 70 70. I doubt that these are accurate considering that I can easily go up hill and rev to 6000 with a problem. I dont think its the ring since they were covered in oil and the oil remain on the cylinder. I dont understand the problem because beside the burning oil, the engine sound normal. Why oil is flowing in all 4 cylinder?

I need help diagnosing the problem. Please help
I would rather avoid replacing the whole engine, but its potentially an option

(If posted this in the wrong section I apologize)

 

[MikeyP1990]

did you take the head to a machine shop so they could check it for being warped /hairline cracks?

 

[Prohero]

I recently bough a used Mazda protege 2003 FS-DE 2.0L non turbo (150000miles) with what I tough was a blown head gasket. The car blew white smoke out the tailpipe and was low on power and couldnt rev above 2000rpm.
So I took the cylinder head apart and found an oily substance which I assume was motor oil. The intake and exhaust was full of black oil. The cat converter was clogged with burned oil so I replaced it. The intake valves looked cleaned but the exhaust valves were full of oily cruddy carbon deposit. So I pressure washed the head and cleaned it. I also relaped the the valves and replaced the valve seals. I cleaned the EGR vavle. And put the cylinder head and everything back together.

When I started the car the smoke came back but the power was restored because I replaced the cat converter. Upon further inspection I removed the spark plugs and found a layer of oil in all 4 cylinders. Oil is also barely making it way to the cam shaft. I tried doing a pressure test but receive what I believe to be false reading. 70 130 70 70. I doubt that these are accurate considering that I can easily go up hill and rev to 6000 with a problem. I dont think its the ring since they were covered in oil and the oil remain on the cylinder. I dont understand the problem because beside the burning oil, the engine sound normal. Why oil is flowing in all 4 cylinder?

I need help diagnosing the problem. Please help
I would rather avoid replacing the whole engine, but its potentially an option

(If posted this in the wrong section I apologize)

well back when i owned a mazda6 my clogged cat caused axcess back pressure back into the engine causing the rings to soften and go bad on me, didnt take long for the engine to be toast. that being said get a diffrent compression tester to really see if u were getting a false reading. to my knowledge this motor shouldnt* run at all under 120, a compressions test on my MSP resulted in 170 across the board. And they are the same motor with the same compression ratio as yours. And think about it, if ur rings were bad ud burn oil and result in having oil in places oil shouldnt be, as well as possible oil starvation where oil should be.

 

[thuzil]

Redo the compression. 70 is really bad. You should not have oil in your cylinder.