Guest essox Posted May 30, 2016 Share Posted May 30, 2016 I'm having trouble getting my valves to quiet down even after adjusting to .002 clearance. Oil flow seems good. I had the head redone with new guides, valves but not the springs as they appeared to be good and I suspect were tested for proper tension. The work was done by Napa. I told them I wanted the guides replaced with hardened guides so I could use regular non leaded gas. I looked at the box the "new" guides came in and they say G-384 and looks like NOS. My question is---- did they replace them with what I wanted or just replaced them with stock guides and that would explain the noisy drive train? Should I try lead additive or mystery oil (how much) to see if that helps? My silent 8 is not so silent. Tks Link to comment Share on other sites More sharing options...
DonMicheletti Posted May 30, 2016 Share Posted May 30, 2016 The guides will not cause noise. It may not be valves - a lot of other things can cause clatter Link to comment Share on other sites More sharing options...
ILIKECARS53 Posted May 31, 2016 Share Posted May 31, 2016 not sure what you asked for but you should have asked for hardened valve seats to use unleaded gas. Link to comment Share on other sites More sharing options...
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