Spark Plug, several options, which one?
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Spark Plug, several options, which one?
My mechanic had previously installed AC Delco #46. He said they were one size hotter than the 45's specified. He said since the engine is old and worn, the hotter plugs will help burn off the oil (it smokes a little). I only use the truck on the farm, never driving at much more than an idle. Not sure what gap he set them at, but seems like .030
Engine is a 300 six, 1977 f150 4x4
I just pulled the AC's and installed Champion since the AC's were old. The champions are 21, copper plus heavy duty gapped at .030. Other plugs are gapped at .042 but this plug specifies a smaller gap for some reason. Are these a good plug to use or should i use something else?
What do you think about the #46 from AC? Gap on either?
thx, dave
Engine is a 300 six, 1977 f150 4x4
I just pulled the AC's and installed Champion since the AC's were old. The champions are 21, copper plus heavy duty gapped at .030. Other plugs are gapped at .042 but this plug specifies a smaller gap for some reason. Are these a good plug to use or should i use something else?
What do you think about the #46 from AC? Gap on either?
thx, dave
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Joined: Jan 2001
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From: Virginia
The mechanic is correct, the 46's are hotter. So if you are having plug fouling problems, then it would help. .030 is a little bit tight though. I would gap them according to the spec on the radiator sticker. .042 sounds like it's more in the neighborhood.
Plugs are like battery brands, etc. Everybody has there own opinion. Some people hate Champion and say they are only good for lawnmowers. Some people will not run a AC plug in a Ford. I have run all different types, and have not seen a real difference.
The only plug I have been impressed with lately was the Bosch platinum 2. I did not put them in a Ford 300 six. I put them in my wife's Honda, basically because the plug I wanted was out of stock. I have changed the plugs twice since we have had it, and have found it's a "plug eater"(the plugs wear fast in this engine).
I wanted to upgrade to a platinum because they wear longer, but had to settle for these type plugs. They are very weird looking, and you can't gap them. and they are a little bit expensive. But I have never had that car start as easy and run as smooth as it has with these plugs. Will it work with your engine? Maybe, maybe not.
Plugs are like battery brands, etc. Everybody has there own opinion. Some people hate Champion and say they are only good for lawnmowers. Some people will not run a AC plug in a Ford. I have run all different types, and have not seen a real difference.
The only plug I have been impressed with lately was the Bosch platinum 2. I did not put them in a Ford 300 six. I put them in my wife's Honda, basically because the plug I wanted was out of stock. I have changed the plugs twice since we have had it, and have found it's a "plug eater"(the plugs wear fast in this engine).
I wanted to upgrade to a platinum because they wear longer, but had to settle for these type plugs. They are very weird looking, and you can't gap them. and they are a little bit expensive. But I have never had that car start as easy and run as smooth as it has with these plugs. Will it work with your engine? Maybe, maybe not.
