Compression numbers, Are they bad, possibe bad pistons?
Posted: June 14th, 2008, 11:16 am
So, I did a compression test to se what i got. I'll do a recap first; I'm struguling with an abnormal use of engine oil, I've replaced head gasket and valve stems w/new seals.
So the nubers: 150, 130, 145, 145, 170, 165 psi starting from 1 through 6.
so all is fairly low. I did pour a smal amut of engine oil in the nr 2 cylinder, and it jumped to 265 psi (witch is way to high).
So how bad are my numbers? And could it be bad pistons? I'm also wondering if it could be a cracked block?
Norwegian81
Just a sidenote; Before I put all the spark plugs back in I figured "why not put a tiny amount of oil in all the cylinders, it cant be harmfull since mazda says it's ok." well I did, I connected all the plugs and started the engine. The engine startet fine, and faster than it normaly does, then... I had my door open and a cool breze was blowing and alot of smoke filled the car. I went out of the car (stil running) and looked at my exhaust thick white smoke was comming out of it and filling my yard, it got less and less, but the smoke (visebility around 5m) was heading towards my neighbor who hopefully wassent sitting outside or having any windows open. In short, I have now found out what to do to realy piss somone off
So the nubers: 150, 130, 145, 145, 170, 165 psi starting from 1 through 6.
so all is fairly low. I did pour a smal amut of engine oil in the nr 2 cylinder, and it jumped to 265 psi (witch is way to high).
So how bad are my numbers? And could it be bad pistons? I'm also wondering if it could be a cracked block?
Norwegian81
Just a sidenote; Before I put all the spark plugs back in I figured "why not put a tiny amount of oil in all the cylinders, it cant be harmfull since mazda says it's ok." well I did, I connected all the plugs and started the engine. The engine startet fine, and faster than it normaly does, then... I had my door open and a cool breze was blowing and alot of smoke filled the car. I went out of the car (stil running) and looked at my exhaust thick white smoke was comming out of it and filling my yard, it got less and less, but the smoke (visebility around 5m) was heading towards my neighbor who hopefully wassent sitting outside or having any windows open. In short, I have now found out what to do to realy piss somone off
