Hey guys,

I changed spark plugs on my '07 Si this weekend and ran a compression test on all cylinders.
Here's what I got.
Cylinder #1, closest to timing chain - 190psi
Cylinder #2, #3 and #4 all showed 200psi

Car has 148,500 miles.

Are these good numbers?


Thanks all

 

they are good numbers as they are all pretty consistent with each other!

 

Great numbers! Especially considering the mileage. A bad number would be if you got 175 in the first cylinder. Whatever you are doing to maintain your car, keep doing it, because It's working. lol

 

Ideally you want them to be the same across the board, but 10psi difference is totally acceptable. You really don't want any more difference than that though.

 

Hi,
I hope this informations is helpfull for you and probably is for the right car. Since you have small variations on your measurments. I will agree with the rest of the members in this honda civic forum.
2007 Honda Civic 2.0L Eng Si
Engine Assembly (K20Z3 Engine) Pressure Check the engine with the starter cranking Minimum 930 kPa (9.5 kgf/cm2 , 135 psi)
Maximum variation 200 kPa (2.0 kgf/cm2 , 28 psi)