what is the best spark plugd for my riviera 455 ? when I install the plug what should be the torque? thanks mathieu
There's a couple schools of thought - How does your motor differ than stock? If stock... - Champion RV17YC - NGK UR-4 (I just purchased these and will be installing them this weekend) Gap at .035'' If not stock, whatcha got :Brow: PS - no need to make them too tight, and make sure the threads are clean when you install the new plugs.
Put them in finger tight, then tighten 1/16 of a turn, that's it. They are tapered seat plugs, it doesn't take much.
Stock gap for a 70 455 is 30/1000. They may have changed it later with HEI and so forth I do not know. Torque is 15 ft ib.
