Will 03 crown Vic 4.6 PI fit into 02 grand marquis which had 4.6 civilian model


Asked by Jan 21, 2018 at 05:53 PM

Question type: Maintenance & Repair

Was told to keep oil pan and valve covers from old motor but from other
answers I see it may require injectors and throttle body from old motor also. If
it fits will it need a computer reflash

1 Answer


To answer this myself, we had to use the long block of the PI motor. Using valve covers, oil pan, oil pick up tube and screen because the size difference, exhaust manifolds also to hook into Mercury exhaust system. Throttle body, fuel rails from the Mercury but kept the spark coil packs from crown Vic , although after driving 50 miles it threw a code for catalytic converter which indicates the catalytic converter is insufficient on bank 2. The engine fit and runs well and in conclusion it will require a little tune up to get thru emissions test BUT it did work and that was a junk yard motor, compression tested only

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