Ford 4000 4cyl overheating

[Errin OH]

I was plowing with a 2/16 in old sod. After a couple hours it acted like I had fouled the points. Put in the spare set and went about my biz. Hour or so later again like it fouled the points again. This time I hear a gurgling like sound I thought was the rad. Turned out it was the classic boiling fuel in the fuel line problem (metal line through the manifold).

Re-routed the fuel line and ran good for the next couple hours when I noticed it was a tad warmer than normal, 205 vs. normal 190 when I work it (160 when not working). Let it cool back down to 160 and started again.

Within the hour I was back up to 205 and heard the dreaded boiling sound again. Only this time I can see bubbles coming out of the screen inside the tank. Fuel line re-rout, was a rubber hose from shut off ran forward and down over the gen’ny to the carb (fan blows air on it now). Either the shut is getting hot or the carb is (I suspect the shut off).

I have had three of this style tractor (NAA, 601 and this 4000). The NAA had the fuel line routed around the tank and this was not an issue (shut off is on the right, above the hyd pump). The 601 had the shut off in the middle of the tank like the 4000 does, with the metal line through the manifold. I didn’t have issues with it either.

I wrapped up after dark and drove it ¾ mile back to the barn. I notice the manifold was a dull red color, brighter close to the engine. I can just image what it was when working hard. This is what concerns me.

I suspect the manifold is getting thin and thus getting to hot. But what else could cause this? Plugs do not show sings of running to rich.
Plowing

 

[reb-in-pa]

If all the normal cooling system checks come out okay (radiator fins clear, water pump pumping, coolant circulating well after a good flush, etc.), then I would check the engine timing. If you're pushing fire out of the cylinders through valves that aren't quite closed, that'll heat up your manifold. E-85 gas runs hotter than the good old stuff, too.

Otherwise, I need to tell you I have furrow envy. The shale and clay that I turn over in northeastern PA never results in the precision seen in your video.

Good luck.

Ray

 

[Dean]

You may want to verify that the ignition timing is properly set and that the centrifugal advance is working but the root cause is todays gasoline.

This problem did not manifest itself until the government involved itself in, well, everything.

Dean

 

[souNdguy]

deffinately check for lean mix ( doubtfull )or retarded timing.

ps.. got your heat shields in place?

getting any run on or pinging? add a few ounces of diesel to the tank.. see what it does for ya.