Failed my oil consumption test and wanted to know what people would recommend doing while they're in there. Its a 2008 4cyl Rav4. They said they would check the water pump to see if it needs replacing. Suggested spark plugs which seems a given. Also suggested new valves due to burnt oil buildup at about $500. Not sure on that one. And they suggested timing belt but since these are chain drive I assume they mean tensioners? Anything else? Truck has 92k miles on it.