I was just wondering if any of you knew what might be causing the strange wear on my exhaust valve spring retainers. It is a steel retainer on a flat tappet cam that started with 145lbs seat and about 375lbs actual open pressure. They were all bought new and the last freshen up they were fine, polished looking surface only.
Things to keep in mind:
• Only the exhaust retainers look like this (intakes look normal)
• I experimented with tighter valve lash (as tight as .024” recommended was .030”)
• It was not coil bound (.180” away from exh and .170” int)
I’m getting to buy new springs and titanium or tool steel retainers so I would like to know what caused this before I buy and install new parts. Is it just wear from a long life? If so why is it only the exhaust retainers when this cam has more lift on the intakes? Anybody have thoughts or ideas for me?