83-85 12A Engine Numbers

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These are the Part Numbers for 83-85 12A Engines. These are just the majority of the ones we list. We are able to "build" about any combination possible with our computer -- just give us specific requests, and we can come up with a pretty exact estimate of the cost.

The "Build Level" chart is at the bottom of the page

Note: Core supply is variable, please call prior to ordering your engine.

For 83-85 12A engines the cost of a full gasket set is included in the price of the engine. We use the gaskets/seals needed to assemble the engine, and send the remaining ones with the engine - that way you have essentially all the gaskets needed to finish the installation.

Mazda no longer sells any 12a rotor housings. This means that the "B" through "F" engines can not be built. Call for specific information if you need a quality 12A engine built with new rotor housings!

83-85 12A
Part Number Description
MZTX-12-4A00 "A" Level
MZTX-12-4B00 "B" Level
MZTX-12-4C00 "C" Level
MZTX-12-4E00 "E" Level
MZTX-12-4F00 "F" Level
Click here for Explanation / Cost / Images of Street Porting
Click here for 13B 4-Port Street Ported "bolt-in" engine packages for 83-85 12A chassis.
Engine related services such as balancing can be found here.


Note: ALL Engines have NEW Apex Seals, NEW Oil Control Rings, NEW Corner Seals, New Side Seals, ALL Springs are NEW, All Gaskets and "O"-Rings are NEW, with NEW Front and Rear Seals.

Parts Build Level / Parts Chart
New Rotor Housings No Yes Yes Yes Yes
New Rotors No No Yes Yes Yes
New Stationary Gears No No No Yes Yes
New Large Oil Pump and Chain No No No Yes Yes
New Eccentric Shaft No No No Yes Yes
New Side Housings No No No No Yes
Used Parts A B C E F
Lapped Side Housings Yes Yes Yes Yes New
Used Rotor Housings Yes New New New New
Used Rotors Yes Yes New New New
Used Stationary Gears Yes Yes Yes New New
Used Eccentric Shaft Yes Yes Yes New New
Used Oil Pump and Chain Yes Yes Yes New New

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