Oil Pump Feckage

[Tony100]

I think the oil pump is goin on my g40 what are the immidate signs

I've got the feelings its on its way out when i belt the engine for say like 4-5 mins ,when i slow down it sounds like one half of my engine is lacking in oil theres a very fast loud tappin noise on one side of my engine itsd the superchager side?? any ideas? 

[hayesey]

get an oil pressure gauge connected up to it ASAP.  That's the best way of telling.

Maybe it's just a sticking tappit though, nothing really to worry about other than being annoying. 

[Tony100]

oil pressure guage?? hard to install???