Originally Posted by jm8881
As long as the engine is the same year or newer than the Jeep and any emissions system that the 2.9 uses is present and the engine was in a vehicle with the same weight class as the jeep AND it was inspected by a referee then it's a legal swap.
There are definitely some gray areas.
BAR's website for engine swaps in CA:
The biggest problem, unless this Jeep was originally a federal 49 state car:
"A federal Environmental Protection Agency (EPA) certified (federal or 49–state) engine cannot be used in a vehicle that was originally certified for California."
Best case scenario is that this is a 49 state Jeep and the engine was swapped from a 2001-2002 Mercedes Sprinter that was also a 49 state US spec car. If this Jeep was originally from California it'd have to have the engine from CA only, and not from Europe.
It looks like the Merc 2.9 5 cylinder is the MO602 (http://en.wikipedia.org/wiki/Mercedes-Benz_OM602_engine
), which from what I can tell was never offered in the US. Even if it was, it was made from 1985-2002. I guess this engine with 500 original miles is NOS? And no pictures of it? Seems odd.
The WJ came with the OM647 2.7L in Europe, and the Sprinter came with a 2.7L engine here in the states. Maybe he's really using this engine which would make WAY more sense.
More rules from BAR:
"Don't mix engine and vehicle classifications which will degrade the emissions certification standards. For example, a heavy–duty engine cannot be installed in a light–duty exhaust–controlled chassis even if they have the same displacement."
Even if he did source the 2.7 from a Sprinter, this rule will cause problems since it's unlikely that the Sprinter and GC are the same class. Chances are the 2.7 diesel is higher duty, but you never know.
"Mixing and matching emission control system components could cause problems and is generally not allowed. Engine and emission control systems must be in an engine–chassis configuration certified by the California Air Resources Board (ARB) or U.S. Environmental Protection Agency (EPA). The engine must meet or exceed the requirements for the year and class of vehicle in which it is installed."
I'm not saying it's impossible, it's just a ton of hoops to jump though which might be why this car is for sale now. It'd be strange to put this much work into a Jeep just to sell it with only 500 miles on a brand new engine. Stranger things have happened though.
I have a friend who installed an LS3 in his RX-7 and it cost him many thousands of dollars to get it to pass visual smog inspection. He had to have the catalytic converters exactly the same distance apart as they were in the Corvette the engine came out of, as well as the same length of hose from the charcoal canister, EVAP purge, etc. And that is putting a CA spec e-rod engine into a 49 state federal rotary powered car that barely passed CA smog when it was brand new. I wouldn't even want to think about what's required to install an engine from a different country. BAR is hardcore with what they allow on the roads in CA.
However, if the engine is really a 2.7 out of a CA spec Sprinter and it's the same engine as the 2.7 in the Euro WJ then this all starts to make more sense.
In fact now I'm thinking I should look up prices of the 2.7 to swap into my WJ when my 4.7 eventually kicks the bucket.