.054 inch ( according to motorcraft . com )
the gap spec is .054
I was looking at one of the Ford websites and it shows : For a 1955 Ford Thunderbird , 4.8 liter / 292 cubic inch 8 cylinder engine : ( the spark plugs are gapped at .035 inch )
you need to set your gap to .054
According to one of Fords websites : For a 1989 Ford Thunderbird , 3.8 liter V6 engine : The spark plugs are gapped at ( .054 inch )
According to one of Fords websites : For a 1993 Ford Thunderbird , 3.8 liter / 232 cubic inch V6 engine : The spark plugs are gapped at ( .054 inch )
No , on the 1996 Ford Thunderbird , the 4.6 liter V8 engine is : The 8th " character " of the VIN is a " W " ( which means the engine was manufactured in ROMEO , Michigan ) It seems backwards to me that " 6 " indicates the 4.6 liter V8 manufactured in Windsor , Ontario , Canada and that " W " is the 4.6 liter V8 , Romeo , Michigan engine , but that's the way Ford has it
.054 inch ( according to motorcraft . com )
Using the 1972 Ford Thunderbird as an example : The 460 cubic inch / 7.5 liter V8 engine : ( has spark plugs gapped at .035 inch )
According to the 1996 Ford Thunderbird owners manual and fordparts.com for the 4.6 liter V8 engine ( Motorcraft FL-820 engine oil filter )
According to a website I was looking at : For a 1996 Ford Thunderbird : 3.8 liter V6 ( 17 city / 24 highway ) 4.6 liter V8 ( 15 city / 23 highway ) Miles per U.S. gallon
I was looking at one of the Ford websites and it shows : For a 1967 Ford Thunderbird , 7.0 liter / 427 cubic inch V8 engine : ( the spark plugs are gapped at .035 inch )
www . motorcraft . com ( no spaces ) shows : .054 inch spark plug gap for a 1986 Ford Thunderbird 3.8 liter V6 engine