Hello Thank you for the advice have a new vacuum advance on order.An added problem now is the rattle I was hearing on start up,now occurring more often.Before only on first start,some cold starts no rattle.Is a gem reco about 35000 klm Was using oil, may have been run low before I bought it.Have adjusted tappets added morey to oil,was using water so seal up in the radiator.Can a bearing problem be isolated as the cause without pulling the motor apart to check.any other possiblities, checked cam chain when doing tappets.Is it much of a hassle after engine removal to just replace bearings with sump removal or should whole engine be stripped down what would be cost effective.second hand mt $900 I fit.Or credit card overload with workshop full reco at $4000 drop in and pick up. Not really an option for an 89 hilux, Any advice appreacated Thank you