: Plug Gaps



frmg0014
02-07-09, 03:05 AM
Our specs says that normal gap of our spark plugs for the Cateras range from 0.35mm to 0.43mm.

Is it better to keep it at the lowest setting (0.35mm) since they will eventually get wider with the mileage? or a bigger setting? Does anyone know what the optimal or factory gap is? :hide:

R-Caddy
02-08-09, 07:02 PM
The standard gap is 1mm, or 0.040". I had bought a set of Iridium NGKs and they were set a 0.060" (1.5mm). At least that's what they said. When I checked the gap, it was at 0.030" (0.75mm) !!! So I regapped them to 0.040". The car seems to be better on gas. Either that or my foot just got a little bit lighter. A combination of both is also very likely :)