Overheating issues
So what we know so far...
- Current rad setup worked fine with older 440
- Engine heats up at idle
- Engine heats up at speed
- Problem started about a year ago.
Question
- Did the old 440 have the same pulleys and fan on it when it worked properly?
Indications:
Overheats at idle and speed says it is not an airflow issue.
Go back and be sure the water pump you bought is the correct rotation. Water pumps designed for serp belts typically rotate backwards
If it's not an airflow problem then it is a coolant flow issue or something else.
Things that restrict coolant flow
- Bad water pump
- Incorrect water pump
- Wrong sized pulleys
- Stuck thermostat
- Debris buildup in the block
- Debris in the water passages.
- Wrong gaskets
Other things that increase tem in an engine
- Timming
- Cracked block
- Excess overbore
- Trapped air
