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Discussion Starter · #1 ·
Looking for some help here. We just overhauled the engine in a 6x4 with the Kaw. Fd620d. One head ( the one that takes the upper radiator hose ) gets considerably hotter than the other side. I have removed the thermostat, blown through all the water lines ( upper and lower rad. hoses ) and get circulation. I am guessing the water pump is not circulating like it should. Even more curious, is the fact that this cylinder had thrown the rod and appears to have been running hot before the rebuild, from looking at the exhaust manifold.
Anyone have ideas???
 

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Welcome to the Forum!!!!!!!!! Someone should chime in here soon with some help!!!!!!!!
 

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If one cylinder is getting hot,that usually means it is running lean on that cylinder. Remove carburetor and have cleaned and rebuilt because it might have jets plugged up
 

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Discussion Starter · #4 ·
Just in case anybody else runs in to this. Here is a fix. There is a cooling system bleed valve on the intake manifold. It is actually a bolt in to the water jacket. With the radiator being lower than the engine you get a air bubble in the cooling system and cannot get the air out to let the water circulate. By running the engine, filling radiator and opening the bleed screw / valve youcan get the air out. Problem solved running great.
 

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Good deal!!!!!!!!!! Glad to hear it is fixed and thanks for the tip!!!!!!!!
 
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