Mazda did once use a supercharger of a very unusual design that used pressure waves from the exhaust to create depressions in the chambers of a rotating honeycomb. The one I saw was belt drive and because the belt was slipping slightly the supercharger was out of synch with the crank and the loss of power was dramatic. Replacing the belt and correctly tensioning it restored full power.
Maybe your car has this type...
SOURCE: mazda millenia problems
here are a few problems to look out for:
Check-engine light: Check engine light comes on due to carbon buildup on the exhaust valves of 2.5L engine. (1995-02)
Engine noise: Some engines make a metallic tapping noise requiring a new friction-gear spring on the camshaft. (1995)
Headlights: The headlight drain hoses can get kinked by the aiming screws causing fogging. (1995-96)
Keys: It may be hard to turn the ignition key because the steering shaft is not positioned correctly. (1995)
Steering problems: The steering wheel may be off center requiring adjustment of the tie rods. (1995).
You can also have a look at the following website where some owner have given their opinions on owning one. http://www.carsurvey.org/reviews/mazda/millenia/r68654/comments/
SOURCE: supercharger in a 2.5 engine
Superchargers are very cool stuff, but they are very expensive to buy, difficult to maintain and if the engine is not in top notch condition and specially prepared for the extra cylinder pressures likely you will blow it up shortly after installing it. I used to build blown fuel engines and know what goes into them, and what happens to them (even the most expensive and best prepared have short lives.) Granted a street unit wont make the boost I'm familiar with but the result is the same. So, even if you can find a kit somewhere, be prepared to own a pile of scrap metal shortly thereafter...
SOURCE: How to remove and install a supercharger in a 96
The supercharger is bolted to the engine and driven by the fanbelt ,with a pipe in from the air filter and then a pipe out to the inlet manifold ,so after finding how to slacken belt adjuster its just a simple job to unbolt the supercharger ,but i have never done one on this model so i couldnt tell you what and where the bolts are .sorry to let you down but i havent worked on every car made .
SOURCE: What is the engine size on a Mazda Millenia 98,
They had two motors that where supercharged, they were a 2.0 liter 4 cylinder and a 2.5 liter v-6.
SOURCE: How to replace valve cover gaskets on a 2000 mazda
just look at the valve covers some are held in place with 6 bolts some only 3 do one at a time and keep working area clean and free of dirt n grease. clean valve cover good and have clean hands when handling gasket, and there your done just replace and bolt down , check bolts again for tightness in a couple weeks.
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