WHAT IS THE REASON FOR EACH CYLINDER TO HAVE HALF THE COMPRESSION?

  • Tiny
  • birdy
  • 2004 Mazda 3
  • 168,000 miles

Did a compression test on each cylinder.
the minimum is 199psi
cylinder 1: 100
2: 120
3: 125
4: 100
when I first start the car it seems to shake, sputter. After the 2nd or 3rd start it fires up runs rough than smooths out.

the only code that is showing is cylinder 2 misfire, pulled plug.
plug is normal, checked all all were good
.

another question:

where is the casting number on the head?

Thursday, April 5th, 2012 AT 11:37 PM

2 Answers

  • Tiny
  • rasmataz
  • Member

Get a cylinder leakage test this will indicate where its leaking

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Thursday, April 5th, 2012 AT 11:42 PM
  • Tiny
  • David W Gillenwater
  • Member

Some of the answers people put on here are so bad. The 2.2 mazda doe' s not have a valve ajustment. And the smoking is from the head. The head has a valley. Where oil is kept at all times. And the valve train is there as well. Valve guide seals. Will crack. And oil will go into the cylinders. And this is where you get the smoke from. And some time they will not stop smoking. Notice on the exst. Manifold there are four caps. Take the caps off. And you will see the cylinder that is waisting the oil. Valve giude crack are brake and this motor will smoke up the town. The valve train is under the oil line. And that is why it will smoke. Notice when you pull the head there is a restrtickter there with the head gasket. It is about the size of a dime. Be shure you put a new one back in. It will come with the head set. If you dont put it back in it will put all the oil into the head. And empty the oil pan. These are very well built motors. And they are strong.

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Sunday, May 29th, 2016 AT 8:21 PM

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