compression numbers

[Glenroy Wright]

I did a compression check on my car because of it starting hard. I did both a dry and wet test. My numbers are cylinder 1 – 50 psi dry 60 wet, cylinder 2 – 60 dry 80 wet, cylinder 3 40 dry 60 wet, and cylinder 4 55 dry 70 wet. cylinder has small leak about 4 psi in 3 mins according to gauge. I know the first question would be if it was done right/if the gauge is good i tried it on a truck and came back with a normal range of 120 + psi. I also know I have to replace headgaskets could this be caused from just that? any help or advice would be very welcomed thank you

Topic

[Richard Kirshy]

You do not state the mileage on the engine.
But being that low across all cylinders could be wear from the rings,valves, valve seat or a poor fitted head gasket.
Suggest you do a leak down test on all cylinders to pin point the cause.

[Glenroy Wright]

the mileage is about 127k. i was told but i don’t believe that the headgaskets were replaced less then 7 k ago. I don’t have any oil loss or coolant loss besides when it has overfilled the over flow tank. when i last drove the car everything was normal no loss of power no smoke and no odd sounds. the only leak i know of is in the fourth cylinder and it is small. And what would be the chances of both head gaskets going at the same time? I am more looking if i should change the head gaskets and see what is wrong or should i change the engine?

[Richard Kirshy]

Before you decide to do anything..
As I said, do a leak down test and narrow down the cause of the low compression.
Then with knowing what is the cause, you can decide on the best course of action.

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