Change the cylinder head gasket

[Sniper]

You know, I am not real sure using a liquid to determine valve sealing is really all that useful.  One thing I learned in the Navy was that something watertight isn't necessarily air tight, but the other way around is. 

 

I mean, think about it, gasoline is "thicker" than air/exhaust gasses so less likely to leak by.  Exhaust gasses are under a lot more pressure as well so more likely to leak by.

 

I guess as a gross, I have nothing better to use check, it works to an extent.  A block off plate with a schrader valve and some soapy water would probably be more informative.

[Roofus]

The compression values of the 6 cylinders are equal and in the values of the workshop manual, I would be satisfied with this test ...😉