If memory serves, red is for larger threads. I would put (blue) loctite on it though, if yours is anything like mine was when I helicoil'd it, the drill punched through the manifold into the air chamber which could present a small vacuum leak. Perhaps my manifold was just abnormally thin down there.
------------------------------------------------------------------ 1992 300ZX NA 5 Sp (Dead) 1990 300ZX NA Auto 2+2 (Dead) 1990 300ZX TT 5 Sp (Stock Turbos) (Est. 400 HP) 1990 300ZX TT 5 Sp (GT600R) (Est. 600 HP) 2004 G35 Sport 6MT (DD) 2008 Honda Civic (DD) 2014 Nissan Murano (DD) 1969 Chevy C10 (Toy) 1969 Chevelle (Toy) |