Pretty sure you should start looking toward worn rocker arms or shafts, or valve stem guides. The guide seals may still be holding out, but the guides 'could' still be worn. And, the 6G72 was never really a quiet engine.


1987 Raider - Roxy
1988 Mighty Max 2.6L Turbo - Pearl
1997 Mountaineer V8 - Freddy
2000 Excursion V10 - Freya