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Hello and thanks for using Just Answer.I will try my best to help you with your question.
The pipe the comes out of the intake manifold behind the thermostat and goes to the back of the engine is part of the lower intake manifold.
It is not serviced separately.
Can you give me a link to that web site on line?
Or the web addresses?
Does your tube look like the one in the picture below?
Do you have a 12 valve engine or a 24 valve engine?
The 12 valve will have spark plugs in the cylinder heads near the exhaust manifolds.
The 24 valve will have spark plugs in the center of the valve covers.
Ford had 2 different 3.0L V6 engines in 1999.
Ok. Big difference.
Ask the mechanic if this pipe the section the thermostat sits in or is it the pipe the goes from the thermostat to the water pump.
Below is what the 24 valve looks like.
And below is what the 12 valve looks like. It will have a coil pack mounted on the front valve cover near the engine.
It's getting late, and I have to work tomorrow. I'll be back online tomorrow afternoon.
Thanks for the pictures. I had to compair it through 3 different manuals to locate the pipe.
Ford calls it the lower radiator hose pipe assembly.
Check out this picture below.
Is this the diagram you saw on the Ford website?