before anything, know that i have searched thoroughly and have not found what i am looking for in any posts or anywhere else i have looked.

i have no heat and its starting to get cold, also this affects the ability for the truck to defrost. i have an '89 t4r body with an '86 22rte engine, i got the truck and engine apart from one another and having never worked on either i have gotten by on guesswork. now im stuck, when i routed the hoses i could not find a return for the heater so i ran it in a loop since the truck used to have a rear heater option and the heater valve has a t, this has not worked.

i am at a miss where the return is, and the truck is running fine, coolant isnt spewing anywhere, i dont remember seeing one when the engine was out of the car on the hoist. honestly i didnt think about it, can someone provide me with pics or info, currently there is a single tube which comes out of the waterpump, past the turbo, under the exhaust manifold and out the rear to just below the heater, it looks as though there should be another somewhere there. i have 4 fsm's, a chiltons and a haynes and they are not helping.

There is one in and one out for the heater core. There is a tube on each side of the motor, one on the driver side as you described and another on the passenger side. that mounts under the water temp sensor, and routes under the intake manifold and to the back of the motor. See the attached pic:

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thanks a whole lot, ill reply with results soon

ok, ive been looking into this in my free time and upon removing the heat shroud from the exhaust manifold i found that the tube i saw originally was the pressure input side which comes from the temp sensor and wraps aroung the engine behind. however there is no return what so ever, except that which runs from the waterpump to the turbo, which looks as though (if i follow the diagram above) the turbo uses the return port for its own coolant return. im thinking maybe theres a waterpump from a standard 22re on this truck and maybe the turbo water pump has 2 ports. in any case, after removing the exhaust heat shroud, i can see no tubing going past the turbo on the driver side, can i make my own return by drilling the water elbow or radiator, has this problem shown itself to others? thanks for any input

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