Just purchased a 1996 OB with an EJ22 Engine and Manual transmission. From a little bit of digging I have gathered that the 1996 and older EJ22 engines have hydraulic valve lifters that do not require adjustment and would thus be very unlikely to make a ticking noise. That leads me to believe that my oil pump may be failing, because I've heard it can have a distinct ticking sound when nearing failure. Sound is most noticeable at idle, seems to come and go at random intervals. Ticking sound may be present while driving in gear, although that is harder to hear definitively. Anyone know if that is an indication of oil pump malfunction?