2nd Generation Specific 1986-1992 Discussion

Series 4 Or 5?

Old 06-25-2004, 03:45 AM
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I've got a 4-port that has the stock Hitachi 18S-2S turbo(the fat one)& supposedly this means it's a series 5 motor, but I'd like some confirmation or some way to absolutely ID this engine....no other marks available on the exterior. THANKS!
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Old 06-25-2004, 10:58 AM
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Take some pics. That will be a lot easier. Specifically the top of the rear iron, and where Mazda 13B is written on the rotor housings.
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Old 06-25-2004, 11:05 AM
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s4 has a threaded hole in the front of the center housing for the knock sensor,

s4 also has 2 bolt metering pump, aluminum 2 bolt thermostat neck, the turbo/ manidfold flange is at an angle



s5, has threaded holes above the spark plugs for the knock sensor, 3 bolt metering pump, 3 bolt plastic water pump neck, turbo/manifold flange is vertical



theres more than that, those are the easy ones
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Old 06-25-2004, 02:19 PM
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Hey all. I was wonderin' the same about my engine and turbo. So here are some pics. Other people can base off of them too.
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Old 06-25-2004, 02:24 PM
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My comp is hating me right now, I'll post the rest later.
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Old 06-25-2004, 02:39 PM
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Originally Posted by Wankleteer' date='Jun 25 2004, 11:19 AM
Hey all. I was wonderin' the same about my engine and turbo. So here are some pics. Other people can base off of them too.
s5 turbine housing
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Old 06-25-2004, 03:03 PM
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S5 housing, SWEET !

Another pic....
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Old 06-25-2004, 03:05 PM
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Here's a pic of the engine bay, think my motor blew, thats why its all apart.
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Old 06-25-2004, 03:07 PM
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Here's those holes you were talkin' about there, dont think there threaded though? Rats nest is kinda in the way, heh.
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Old 06-25-2004, 03:15 PM
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Originally Posted by Wankleteer' date='Jun 25 2004, 12:07 PM
Here's those holes you were talkin' about there, dont think there threaded though? Rats nest is kinda in the way, heh.
s5 motor i bet, prolly a jspec?
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