Re: 1936 120 Overheating

Posted by JWL On 2016/9/11 12:39:26

You say the water pump looks ok. Good. Sometimes the impeller is not in the right position on the shaft. It will not function properly if it is too far away from the back of the housing. You might want to check for this. Use a piece of puddy on the back of the impeller reassemble the pump, disassemble it and see how much the puddy has been compressed. There should be very little clearance. I don't know how much, but someone here will know.

Another item to check is the distributor vacuum advance chamber. Don't recall if the 120Bs have one, but a leaking chamber can deal all kinds of bad things. Easy enough to check by disconnecting the line and sucking on it and holding it. If it does not maintain a seal it is bad.

Surely you have a water distribution tube in the engine block. It is easy enough check after the water pump has been removed.

I would certainly re-torque the cylinder head nuts.

Your radiator cap is a non-pressurized type.

Hope this helps.

(o[]o)