Quote:
Originally Posted by Christ
^Engine switching fact sheet from EPA, cites relevant laws and paperwork.
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States can (and often do!) have different requirements than the EPA.
In CA, you
cannot legally swap an older engine into a newer car. It used to be that you could do that as long as you had all of the emissions equipment (with a broad definition of that!) from the chassis. Even earlier, you could do that and use the emissions equipment only from the engine. But they changed the rules to say you simply cannot do it now.
You cannot swap truck engines into cars, nor vice-versa.
You can swap a newer engine into an older car, but you must have all of the emissions equipment that came on the US-spec car the engine is out of. (So in theory, all of the B16-swapped Civics in CA are using Del Sol VTEC engines, including intake, exhaust, ECU, and so on.)
The regulations can be a real hassle to untangle, which I suspect is a major reason that there are so many registered cars that would technically be illegal if one followed the letter of the law.
-soD