My compression test results

[Infinitrium]

The car was warmed to full operating temperature, then I changed the oil. 2 hours later, the car was warmed again to full operating temperature, then left to cool for an hour. I hauled out the plugs and screwed in my compression tester. The results:

Number 1: 180
Number 2: 177
Number 3: 170
Number 4: 175

How do those numbers sound? We had a bit of difficulty getting a number off of number 3, the needle rose slower than on the other 3 cylinders. There's an awful lot of dirt and grime around the spark plug holes so maybe it wasn't seated all the way?

[nonamekid]

Those number look good. The big thing to look for when doing a compression test is to make sure there is not more than a 10% drop between the highest compression cylinder and the lowest. In your case you had a drop of 5.88% which means your in good shape.

[darkdan]

If you blocked the TB open and got accurate numbers those are very good.

[Infinitrium]

I don't know about blocking it open, but I did hold the pedal to the floor while I was cranking it over. Is that the same? What is factory specs for compression on the B3?

[darkdan]

Yeah, that's blocking it open.

I'm not sure of the factory specs. But the important thing like he said is within 10% of eachother.