Re: Water Distribution Tube Removal

Posted by Owen_Dyneto On 2009/2/13 10:05:55

The pictures show the value in removing and cleaning the distribution tube. The holes in the tube direct the coolest water to the hottest area of the block first, the exhaust valve seats; failure here leads to overheating, burned exhaust valves and pitted seats, and eventually can lead to to cracked engine blocks at the exhaust seats. The usual crack then runs across the block to the cylinder bore, and then you're shopping for another engine block. Removing and checking the tube should be considered mandatory whenever the condition of the tube is not known.

On the aluminum crankcase/cast iron bore engines (the Eight and Super Eight thru 1939), the water jacket side plate performs this function and should similarly be removed and checked if it's condition is unknown.