Does you mean "brake" cylinder ??? If so, maybe you have the same problem as I had few months ago, one of my cylinders hadn't the hole inside, Ive never seen something like that before... We had to drill the hole to make the cylinder working well...
View attachment 8554
View attachment 8555
Intake manifold gasket, they come loose if the exhaust bangs on the inner wing,
I'l check it