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Old 01-23-2013, 09:08 PM   #1
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Angry Coolant leak at Inlet Tube at Back of Intake Manifold

Well, this was not one of Ford's better ideas. I have a 98 F150 4.6L . At the rear passenger side corner of the intake manifold there is an inlet tube for coolant. This is connected to the heater core. This inlet tube is pressed into the manifold itself, and when it springs a leak you have to remove the intake manifold to fix it. I got a leak.

So I did remove the manifold. A new inlet tube goes for about $29. To get the old one out I had to use a torch to heat up the area of the manifold the inlet tube is pressed into. Then to install the new one I had to do the same thing. Heat the manifold, press and pound the new one in. It bent.

So out with the new one. I then used a tap to thread the hole for 3/8 pipe thread. Then I just screwed in a length of pipe, popped a hose and clamp on it and that was that. Then I put in new gaskets for the manifold, the air intake, the EGR vacuum line.

All for a pinhole coolant leak. Thanks Ford engineers. Brilliant.
'98 Lariat Supercab Styleside 4x2, 4.6l V8 Windsor Automatic, 160,000 miles.
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