No compression in cylinder six

Good afternoon.

If you have no compression, it could any of the following:

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

1. Burned valve or valves.

2. Hole in a piston.

3. Broken valve spring on the valve.

All these need to be checked to confirm.

Most likely the head will have to come off to determine the failure. You may want to consider replacing the engine with a good used engine.

Roy

So it's a most they have to take out the engine?

Most likely, yes.

It looks like either an overhaul or replacement.

Roy