Re: 23 Series - Overheating 288 engine

Posted by David Baird On 2008/7/23 13:37:51

I'm sure you know all of the following and have already checked them. But, just in case.
1. Check the heat riser on the exhaust manifold. Is it stuck closed or partially closed?
2. Check the ignition timing. Packard 8s have a tendency to run hot if it isn't correct.
3. Check the water distribution tube. Is it plugged, crushed, or rotted?
4. Rebuilt water pumps sometimes have the backing plate that is not smooth. If it isn't, water cavitation can occur and the efficiency of the pump is reduced.
5. Use an original Packard water pump. Some of the after market pumps are not quite the same as the original and are not as efficient.
Good luck with solving the problem. I hope the above helps.