Re: Overheating
I have taken off the inlet casting on the drivers side of the motor and found alot of rust in the passages between the cylinders. Back flushing, probing and air from the upper neck can dislodge some of this scale. Do you have grease in the block from the waterpump? That dissolves with simple green. Then follow with the vinegar treatment can help to attack the scale. The head is another good source of scale. Scale will plug/restrict the passages, and the nice clean radiator.
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