00 gt conv Posted May 27, 2022 Share Posted May 27, 2022 Hello New guy here I ha e a 00 mustang gt convertible the guy I got it from says he thinks the motor has been changed how do I find out witch motor I have in this car 4.6 or a 5.4 Quote Link to comment Share on other sites More sharing options...
00 gt conv Posted May 27, 2022 Author Share Posted May 27, 2022 Motor identification help 4.6 5.4 Quote Link to comment Share on other sites More sharing options...
akirby Posted May 27, 2022 Share Posted May 27, 2022 Mustang GT never had a 5.4L. It’s a 4.6 Quote Link to comment Share on other sites More sharing options...
00 gt conv Posted May 27, 2022 Author Share Posted May 27, 2022 Yes I know that the guy I got the car from said the motor was changed he thinks it came out of a ford truck that's why I was asking how to go about identifying what was in the car Quote Link to comment Share on other sites More sharing options...
Harley Lover Posted May 27, 2022 Share Posted May 27, 2022 I asked a friend who knows both engines well, he said: - pull a spark plug and get the part number (4.6 and 5.4 used different plugs) - most 4.6 had aluminum intake and 5.4 had plastic intake Hope this helps. Quote Link to comment Share on other sites More sharing options...
00 gt conv Posted May 27, 2022 Author Share Posted May 27, 2022 Mine has a plastic intake. And I know the freeze plugs for the 4.6 will not fit they are too small so that being said I'm assuming it is the 5.4 I just didn't want to order parts for the wrong motor thanks Quote Link to comment Share on other sites More sharing options...
ESP08 Posted May 27, 2022 Share Posted May 27, 2022 1 hour ago, Harley Lover said: I asked a friend who knows both engines well, he said: - pull a spark plug and get the part number (4.6 and 5.4 used different plugs) - most 4.6 had aluminum intake and 5.4 had plastic intake Hope this helps. The 5.4 used a 22 heat range and the 4.6 used 32s, but the plugs are fully interchangeable. If this was an engine swap project I'd be surprised if he's using OE Motorcraft 22s in the 5.4, never know though I guess. The 5.4 is physically wider, if it's still using the Mustang GT-style intake manifold do you see any adapter plates between the intake and heads? How wide is the engine cam cover to cam cover? Quote Link to comment Share on other sites More sharing options...
00 gt conv Posted May 27, 2022 Author Share Posted May 27, 2022 They are not any adapter plates between the intake and heads.... I will measure the cover when I get home. And the motor is wide Quote Link to comment Share on other sites More sharing options...
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