Rep Power: 0

Originally, someone was supposed to replace the head gasket on my car for me because I was busy. I don't think they did the head job correctly. After a compression test, I got these results:

• Cylinder 1: 125-127 psi
• Cylinder 2: 50 psi
• Cylinder 3: 24-26 psi
• Cylinder 4: 160 psi

So, I took off the head. Pistons in cylinders 1 and 4 are almost squeaky clean, but 2 and 3 are burnt and dirty. There's coolant all around, and I believe there's oil too. Could it be that the head wasn't done right, or could it be an issue with the pistons? The car would overheat but start up just fine before shutting off if I let it get too hot. I have attached photos below to help paint a clearer picture.

 
Rep Power: 222

Clean usually means burning coolant but with the compression that low there's definitely an issue with the head or block between 2 and 3. Or valves but I doubt it.

 
Rep Power: 0

Bet, thanks for the reply, so burning the coolant is good its just something that could be wrong with what you said then?

 
Rep Power: 222

Burning coolant is not good.

 
Rep Power: 224

How much do you trust the person who did the head gasket? I think they did something terribly wrong.

 
Rep Power: 367

maybe head was warped and not milled