Weird leakdown test issue

[NHerron]

All cylinders are perfect in compression test. All same number.

1,2,and 4 cylinders are perfect on leakdown.

#3 is weird. I plug it tester and goes to zero, complete leakage.

I hear air coming from #1 plug hole (NONE OTHERS). Rotate cam and stops leaking from #1 but still at zero. AFTER a minute or so, the damn thing fixes itself and gauge goes up to perfect <5% leakage.

Any wizards have the idea as to what is going on?

 

[NHerron]

Alright it's solved.

I took the valve cover off to see the lobes position.

I rotated to tdc again with lobes up and all is well. Perfect leakage.

Lesson learned, just take the VC off next time plus it's easier to rotate engine since cam has hex for wrench...

 

[motomattx]

Dont rotate the engine using the hex on the cam, it will jump time on the cam gears.

 

[bling5tatus]

Yeah the timing belt isn't a tool for rotating a stopped engine. MotoMattx is right.