What motor is in it? Have you googled it to see if anything comes up? I would do a search for location of water on a 92 mazada(insert motor here) and see what results you get. It may be one of those that its inside of the motor have to remove some covers to find it or even the timeing belt on some cars or trucks. I am not much on foreign stuff, but if you got what motor is in it we can some looking to see what we can find out or maybe somebody here already knows.
Some water pumps on these 4 bangers are behind the timeing cover and behind the timing chain/belt inside the motor.
No they are not, I own 4 of these trucks. They do not have timing chains, only helical gears so I don't know what engine you think this is.
Here you go, water pump behind top pulley wheel.T4000T is an over bored T3500SL block with oversized liners.
Thats why I said some do, I know of one GM motor that does have it inside the motor behind the timeing cover.
So what, that's not what the OP asked. He asked about a specific diesel engine, (Mazda T4000) I answered the question, let it go.