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Overheating Palmer inline 6 Cyl. IH 264

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Hal Ward
Posted on Monday, June 14, 2004 - 11:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I am having overheating problems with my 6 cyl. inline Palmer and would like to replace or rebuild the manifold and maybe source a thermostat. The engine has an IH 264 block rated at 135 hp. The engine number is: 4333365. I am guessing year built 1963-1965.

Water is flowing through the exhaust, but the coolant is blowing throught the overflow hose or port. Engine overheats and quits. Without the help of an infrared gun, manifold seems much hotter to touch than valve cover. Engine has set for some time but provided some 20 hours of smooth running at 50-70% power before heating problem. Oil levels remain good with no oil burned during 20 hrs. of operation.

I traced the hoses back to a cast housing that looked like it should hold the thermostat and temp sending unit. Opened same to find no thermostat with elec. type sending unit mounted on side of housing. Checked temps with manual thermometer and sender seem accurate within 1-2% at lower temps. Looks like the thermostat has been gone for sometime (if it ever was there)as a faucet valve and hose rig seems to function as a manual thermostat of sorts. Valve closed for coolest running before break down. Valve cracked open made for higher, but acceptable temps (sub 180').

If anyone on this site has knowledge of a source for cooling system parts or form, fit and function equals (Osco Barr ??) please advise. Same goes for thermostat. I would hate to have repower this boat for cooling problems in light of the strength of the IH 264. Any help or advice most welcome. Many thanks.
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Paul Sullivan
Posted on Tuesday, November 09, 2004 - 09:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hal, I had a similar problem with a MD 301 (Palmer/Int.) Diesel. Turned out that the end of the exhaust manifold had an overflow hose. Very small hose that was clogged creating an airlock in the top of the manifold. The manifold has to "burp" and if this line is clogged it will overheat. I also overheated one time when I had gasoline in the fuel tank. No rpm change, no hint of gas... nothing. Some redneck mechanic told me to put some fuel from the supply line on my hand- if it dried it had gas in it. The one engine didn't dry and ran cool. The overheated one had gas in it for sure. It dried right on my hand after less than 30 second.

Hope this helps... and let me know if you know anyone or yourself who would like to get rid of an injection pump for palmer deisel. Stanadyne or Roosamaster.


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