rexracer

I just gone doing a compression test on my D16Z6. Cylinder 1-180 2-185 3-180 and heres the great one. Cylinder 4 is 130. Obviously something is fucked up and I was wondering if someone could let me know with the numbers I gave. I know what it could be, but can the #'s give you an exact is my question.

HMT-Admin

Its really unknown since, it could be a burnt valve, it could be broken piston ring lands on that cylinder, it could be a blown head gasket in that cylinder. You can either do a cylinder leak down test, (special tester) or just rip the head off and do a visual inspection, check the valves, check the headgasket, and fill the cylinder full of gas/solvant and see how much it leaks down. Taking a head off a honda is really easy, just pray you didnt do any serious damage.

Also, squirt about 2 tablespoons of oil into that cylinder and redo a compression test in that cylinder and see what happens to your #. If it jumps like over 30psi, you maybe looking at rings/pistons.

Jeff

rexracer

Ok, after that I wasn't really in the mood to do a wet test, but I'll try it tomorrow. Thanks for the help

rexracer

I forgot to ask, but are the 180's common compression #'s though?

HMT-Admin

165~190ish would be ok in my book

nyc86zc

My ZC was 180 across the board until I blew the ring lands. Then one went down to 100. Rev the engine and check your PCV line. If you see a lot of smoke and oil coming out then more than likely it's your ring lands. Mine looked like this:

R-MAK

yummy

chingro

do a leek down test