No compression in cylinder number six

Hi,

Here is a guide that lays this out. However, there are a number of reasons which are the intake valve, exhaust valve, compression rings on piston, and then a head gasket issue.

You will want to do a cylinder leakage test. This is where you put the piston on TDC, put about 50 PSI of compressed air in the cylinder and then check the intake, exhaust, cooling system, and crankcase (oil fill cap) for air escaping. This will tell you where the air is coming out which means this is where your compression is escaping. This will tell you what component you will need to go in an replace:

https://www.2carpros.com/articles/the-reasons-for-low-compression

Let me know if you have questions. Thanks