My friend just did a compression test on his 91 civic si that has a D16a6 block with the D16z6 head. 2 of his cylinders read a 125 while the 2 other cylinders read at 175, so he was wondering how those numbers looked for the engine he has and what could possibly be the problems.

 

Numbers are not good...

Do a leak down test aswell... That may help shed a bit of light on the situation.

 

thanx, ill let him know, hes gonna stop driving the car and tear it down to find out more.