Join Date: Sep 2000
Location: Washington, Michigan USA
The flare-nut fitting (pipe-to-carb inlet fitting) leak can usually be cured by applying a light coat of teflon pipe joint compound (NOT teflon tape) to the threads on the male fitting - not as a sealer, as the seal is at the flare, not at the threads, but to reduce thread friction in the plated fitting, which will allow it to tighten up more, exerting more pressure on the actual mechanical seal at the flare surfaces (assuming the seal surfaces aren't damaged).
The other potential leak site (inlet fitting to carb, which uses the thin metal gasket) can usually be cured by removing the fitting and applying a good thread sealer (like ARP) to the fine threads on the fitting and re-installing the fitting with a new metal gasket.
Both methods have worked for me in the past, with no recurrence of leakage.
'69 Z28 Fathom Green