I have a 2001 Toyota Camry with a 2.2 liter 4 cylinder engine. it has good oil flow to the exhaust cam but no oil to the intake cam. the toyota dealer cant or wont get me an oil flow schemitic. I am rebuilding the engine myself. there appears to be a steel ball approx. 3 inches down the oil gally on the intake side. should it be there and can it be repaired?