Oldsmobile Cutlass Supreme Engine Swap

Hello, I own a 1984 Oldsmobile Cutlass Supreme, 507c.i.d, 5.0L, 4BBL Carbureter, with a TH200-C (3-speed)Transmission. I want to know what the legal requirements are in California for an engine swap as far as the smog check is concerned.

My vehicle is registered as Non-Operational (Not Running). When I attempted to smog test it, it failed. I wanted to upgrade the engine prior to registration and I was wondering if there are any guidelines.

I want to upgrade my engine to a fuel injected one and hopefully '99 or newer. Along with the engine I hope I can be legally allowed to swap (original to new engine) the transmission (much more fuel efficient 5 or 6 speed), the exhaust (with O2 sensor, catalytic converter), the ECU/PCM, and the OBD2. I was wondering, if done correctly, if there are any restrictions aside from only passenger to passenger engines. I want to make this Oldsmobile Cutlass more fuel and emission efficient. Thank you for your time.

Answer:

While installing a more fuel efficient engine in your Oldsmobile Cutlass you will need to install all the emission components for that engine as well (including computer ECU and exhaust system). You may also install a matching transmission (5 or 6 speed, so long as it was designed to function properly with the engine of your choice).

After the swap is complete, your Cutlass will need to be inspected and smog checked by the California State Referee. The Referee will ensure that the job was done properly and that the new engine does not pollute. If all is well they will issue you a BAR label which will be placed on your Oldsmobile Cutlass' chassis which will be an indication that the vehicle is California legal and allow you to obtain subsequent smog tests at ordinary smog stations as opposed to the referee center.

In this case we recommend you speak directly with a State Referee before beginning this project. You can contact them by calling (800)622-7733.

posted by SmogTips Support