My wife's '99 Bonne 3800 has a weird ticking issue that comes and goes. I thought maybe it was lifters so I put a can of seafoam in the oil, drove it about 60 miles then had the oil changed and it didn't come back for about a week. Today it started doing it again but if you shut it off and start it again the tick goes away. The oil pressure is steady above 40 ticking or not so I'm stumped.
