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! https://www.nopistons.com/forums/pub...IR#>/blush.png

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.

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

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.

My comp is hating me right now, I'll post the rest later.

s5 turbine housing https://www.nopistons.com/forums/pub...DIR#>/ohmy.png

S5 housing, SWEET !

Another pic....

Here's a pic of the engine bay, think my motor blew, thats why its all apart.

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?