I recently changed valve cover gasket and spark plug seals. I`m not sure but is it possible to put the spark plug seals backwards? Also I`ve got this weird sound coming out of the engine now like a squeal, seems like its coming from the dipstick, when the noise starts I would lift the dipstick a bit and it would stop till its in place again. Anyone else have this problem? Sound is very annoying.

Replace your PCV valve.

I have just replaced it recently but I will again it doesn`t hurt its a cheap part

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Changed the pvc still alot of pressure and noise. Any ideas?