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#1
08-10-2016, 06:09 PM
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Need opinions from the engine guru's.
We got a tractor in at work that overheating, the tractor is a Ford 871 with a 172 gas engine. It takes about 30 minutes for it to get the temp gauge into the red, it was the same on both the new and old gauge. Here's a list of what's been done so far.
New rad - old one was pretty beat up and had a small leak New water pump New thermostat Switched from 3 blade to 4 blade fan Set timing Head was checked by machine shop for cracks and new head gasket Air cleaner check for restrictions even though I pointed out a plugged air cleaner would make it rich The tractor runs great other than the temp issue and we're starting to run out of ideas, I don't think it's a carb issue because the plugs look good and if anything it's a little rich. The engine was rebuilt a few years back by another shop in ohio. We also popped the freeze plugs out of the block and from what we can see it's pretty clean but I'm leaning toward something in the water jackets blocking the flow. Ideas or opinions welcome. Edit - another theory I threw out was plugged exhaust but I'd have a hard time believing the engine could ever run as good as it does with a plugged muffler.
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Tim Pap's 100 Restored 108 1211 Dual Stick 1050 Pap's 100 restoration thread - http://onlycubcadets.net/forum/showthread.php?t=47965 
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