0 compression in one cylinder!!!

[fwdtsi]

Ok, I compression tested my car today and found that every cylinder had 160 but one had 0 compression is this even possible. I guess it means my motor is F'd right?

 

[NOSLO2PT0]

Means something is ####ed. Either you holed a piston, or have bent valves or a dead lifter in that cylinder. Time to tear it down and figure out the problem.

 

[markmakeitso]

Before you tear it down I'd do a wet test. Pour about 1 tablespoon of engine oil down the spark plug hole of the low cylinder, wait a minute or two, then retry the compression test. Dramatic improvements will show worn rings as the problem.

 

[luv2rallye]

Extremely likely a valve stuck open (may be due to being bent). Pull off the valve cover and look if any on that cyl are stuck open. (If it is a piston hole, your oil will be messed up with gasoline and will be discolored.)

 

[xcelr8n]

same shit happened to me, didnt even bother to find out, because the other 3 cylinders were nothing to brag about either.
so just dropped in a jdm, and now im laughing at 155 across

 

[rph74]

Originally posted by luv2rallye
Extremely likely a valve stuck open (may be due to being bent). Pull off the valve cover and look if any on that cyl are stuck open. (If it is a piston hole, your oil will be messed up with gasoline and will be discolored.)

Agreed. This just happened on my 91.

 

[The Avengence]

happened to me too. turns out it was a piston melted

 

[StarDiamond]

u can hope for the better side and it might just be a fried ring

 

[turbowop]

You could also have a burned valve, like this: