Have a oil leak problem and want to check Pcv problem is I want to know where is it?? Does anyone know. Thanks for any help p.s. 05/v8

Checking is real simple, use an old latex glove over the oil fill hole and start the engine. If the glove inflates, replace the system.

The V8 is a bear to work on, but not the PCV. It is the black round thing on the rear valve cover. Unlike most other volvos, the v8 does not have a flame trap/catch can pcv system. It's just the valve and the hose that links it to the intake.

So long as you use synthetic motor oil, you should be OK.
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Keeping it running is better than buying new

Thanks klusc. By round thing at end of cover I assume you mean the the round plastic piece on the diver side of engine with 2 bolts looks like 10mm.does the air intake has to be removed?? Thanks

Air intake stays in place. So long as the glove test works(deflates) you shouldn't have to do anything.

I would only worry about changing the synthetic engine oil every 5K miles. The oil must be kept clean, otherwise you will have trouble with the CVVT solenoids - there are 4 of them.
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Keeping it running is better than buying new