just did compression test on my o3 evo what do you think?

175,175,175,150

 

I think you need to do it again, that last number is a little scary.

 

Yah If I recall thats even (much) lower than the last time you PM'ed me with the value.. Try it again..

 

At 49,850 miles, mine was 163,155,154,154. Thats not good is it?

 

its showing signs of wearing out with those low numbers.

 

its really hard to find a cheap $30 compression tester that reads good. as long as the comp. numbers read consistant, then your good
mine reads 160, 155, 155, 155. even when i added oil, it didn't change.

 

I need to test mine sometime soon... great reminder.

 

Did you use my How-To? I hope some one got some use out of it. https://www.evolutionm.net/forums/sh...d.php?t=154364

 

Here are some numbers from an evo that I am troubleshooting for a friend... let me know what you think.

167, 170, 169, 0 psi

I havent added the oil yet to see if pressure goes up, but I just wanted to ge those numbers out there for input.

 

if the engine shows 0 psi will will not come back up and if it does it will be very low. he either burnt a compression ring/scored cyl wall, or bent some valves in that cyl
Chris

 

Planning to do this soon.
How long do you need to crank the engine over to get a accurate reading? 2-3 seconds?

 

What would be the correct path in determining which of those it could be, I would imagine taking off the valve cover and inspecting the valves, but any input would be helpful, thanks. BTW, after oil add it remained at 0psi, which is what I figured it would do but wanted to complete the test.

 

Seems that after 4 or 5 bumps from the cylinder hitting TDC it would stay the same.