The ACDelco CR43TS spark plug typically has a gap specification of 0.040 inches (1.0 mm). However, it's important to verify the specific requirements for your vehicle, as gap settings can vary based on the engine type and manufacturer recommendations. Always consult the owner's manual or a reliable source for the correct gap setting for your application.
check with your parts house to get the gap for your particular application.
Spark Plug (ACDelco R45TS) [Gap @ .035” for points distributor, .045” for HEI distributor]
.045 " is the correct gap.
0.035 inches for CR43TS or R43TS AC Delco spark plugs
Spark plug gap for a 1977 Corvette using ACDelco R45TS is .035
ACDelco #41-601 conventional spark plug gap .060"
If your're using ACDelco Platinum Spark Plugs the gap is .040".
Platinums are gapped at 0.60, and iridiums are typically gapped at 0.40... you shouldn't try to change the preset gaps.
Under the hood you will find a placard with the Spark Plug Gap listed.
Depends on the spark plug you use. The ACDelco part number R43TS6 uses a .060" gap.
you will need some ratchet swivels or wobbles but more importantly some short (1/2" - 1&1/2") extension if you can get them. doesn't look like you can over insert them, plugs pulled out were ACDelco CR43TSM, I replaced them with CR43TS, noproblem, did not look like they could be over inserted. Haynes manual lists gap for plug as .035" you will need to gap plugs before installing if using the acdelco cr43ts plugs hints: A small mirror be helpful to get a good view of the plug holes as you stand at your front bumper and face the engine, the upper right of the six plugs will be very hard to reach because of the steer column; to make this easy get a second person and have one stand in front of the car to guide the fitting, and have the other person crouch by the front driver side wheel well and reach the plug with the ratchet fitting/extension (6" or so)
ACDelco conventional spark plug 41-601, .060