Which engine do you think is more "bulletproof" and why?


Asked by Feb 09, 2017 at 12:46 PM

Question type: General

Which is the best out of the two: The GM 3800 Series 2 V6 such as the one
found in an Impala LS or the Ford 4.6L V8 such as the one found in the Crown
Victoria P71?

3 Answers


I would give the nod to the Ford 4.6, but both are pretty good engines, the 3800 upper intake is weak at the EGR port, a source for coolant to get into the oil pan, and the lower intake gaskets are plastic (depending on year), you would need to replace them with GM's aluminum set. It seems most of the faults with the 3800 series II are with the intakes. I currently have a P71 with over 320,000 miles on it, and it still runs great - on it's original timing chain and head gaskets. You really can't go wrong with either engine. The transmissions however - if you want to get to 300K with these you'll go through about 4 transmissions lol.

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Yeah the P71 engines are very high torque engines. The transmissions can't really take all the torque. I have an Impala with the 3.8L and I recently had to replace the entire upper intake because when I tried to start my car one cold morning the engine backfired and the intake literally exploded. I replaced it and now it runs as good as new. You get the best of both worlds with both engines. They definitely both have plenty of power though!


The Ford Triton engines are almost bullet proof. The weak point is plugs that blow out but I have two 5.4 Tritons with a combined total of 350,000 miles with zero issues other than replacing a few ignition coils.

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