Quote:
Originally Posted by labrador
I wonder if the oil pressure drop from the camshaft ledge problem lead to the ticking sound or if the HVA oil leak lead to the wear in the camshaft ledge?
I am inclined toward the ledge cause an oil pressure drop. Does anyone know if the updated cylinder head comes with new camshaft ledge(s) and camshafts?
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Unrelated. Camshaft ledge seal leaking oil due to wear will cause vanos errors and some drivability issue.
Air getting trapped HVAs just cause noise until air clears, no codes or drivability issues at all.
The ledge seal doesn't supply oil to the HVA's, only to the VANOS unit. Lifters have oil galleries in the head supplying oil to them as far as know.