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92 f150 5.8l overheating when driving slow!!

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92 f150 5.8l overheating when driving slow!!

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Old 05-16-2018, 11:15 AM
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Default 92 f150 5.8l overheating when driving slow!!


Rebuilt engine in my truck. Purchased a bored out .30 over block that had a Ford racing cam for trucks. Was told the block was from an older vehicle but wasn't sure from what. I removed the egr and air injection. Reused my old head's. The water pump for my truck wouldn't fit so I had to get one from an 80's truck. Installed headers and put it in the truck. I set timing at about 12degrees btdc. It would warm up and overheat. I took the thermostat completely out to rule it out but still gets hot. Changed the radiator and installed electric fans. If I'm driving about 30 the temp gauge won't even move. But under 30 or so it heats up and will peg the gauge. I'm running the stock computer and injectors and all that. It idles a little rough. I changed plugs and wires to. I love the truck and want to keep it but I don't know what's going on. Please help!!
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Old 05-16-2018, 11:48 PM
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Usually when buying head or intake gaskets there are cut off years for compatibility . With that out there, could the block water ports not match up with the heads?
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Old 05-16-2018, 11:51 PM
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Also just another thought, you might have a standard rotation water pump with a revere rotation belt routing.
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Old 05-16-2018, 11:55 PM
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Two good points. I'm gonna look into both of the parts. (Water pump/ gasket kit)
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Old 05-17-2018, 09:47 AM
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So after doing some research I figured out that the 84 f150 water pump that I had to put on my 92 f150 "mutt" engine is spinning the wrong direction. They changed directions for those years. Now what do I do ha ha. I can't really reroute the belt because everything else will most likely spin the wrong direction.
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Old 05-17-2018, 12:17 PM
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The timing cover & water pump have to match the belt routing. For serpentine belt, you MUST use a reverse-rotation (driven by the flat side of the belt) cover & pump. That means '88-96.
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Old 05-17-2018, 12:21 PM
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A timing cover from a 92 block should fit the old style block?
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Old 05-17-2018, 11:42 PM
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The only change to the block I can think of was the addition of bosses for roller lifters & a knock sensor in the late 80s - nothing that affects the timing cover.
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