Overheating

[Fiddlesticks01]

So I have a 86 ford bronco xlt it has a rebuilt 302 with a performer cam and crank electric water pump aluminum radiator with 2 fans. My issue started today truck started running hot ****** coolant everywhere. I. Replaced he thermostat today the eltronic water pump

Is working I put a new radiator cap on as well I see the system

Working but it's still

Running hot. Any advice maybe air in the line? Upgrade the water pump?

 

[miesk5]

Yo Fiddlesticks01,

Welcome!

Here are some long-distance, non-visual perpetrators: includes some obvious items, so forgive me for including them:

Visually inspect A/C condenser core and radiator for obstructions, such as leaves or bugs.

Allow engine to run for 10 minutes if possible.

Feel the inlet and outlet heater water hoses and the underside of the upper radiator hose. If the upper radiator hose and heater water hoses are cold,  REPLACE  thermostat. 

CHECK the following: [SIZE=10pt]Collapsed lower hose: [/SIZE][SIZE=10pt]Rust or scale in radiator[/SIZE]

Water pump current, voltage and flow?. Check specs in installation instructions if available. If not on-hand, do you have brand name and model?

Hopefully the alternator is capableof supplying enough current and voltage drop isn't excessive.  Most upgrade alternators to 3G.

       

 

[Fiddlesticks01]

Thanks for the info upper radiator hose is hot as is lower. I replaced the thermostat yesterday I'm pretty sure I over filled it with coolant, but the first time it boiled over it was at the correct level. I replaced the radiator cap and can see the system sealed, I think there's sir in the system. Could the water pump not be circulating it fast enough? Or too fast? This truck heats up fast.

 

[miesk5]

Yo,

Some electric pump mfgrs quote up to 35 gallons per minute flow.

Burping the coolant system; this is by Ford;

1. Fill the radiator with a 50/50 mixture of the specified engine coolant concentrate and water. Allow several minutes for trapped air to escape (bubble out) and for engine coolant to flow through the radiator.
2. Replace the radiator cap to its fully installed position, then back off to the first stop. This will prevent high pressure from building up in the cooling system during this part of the fill procedure.
3. Start and idle the engine until the thermostat opens and the radiator upper hose becomes warm.
4. Shut off the engine and allow the engine to cool. Cover the radiator cap with a thick cloth and cautiously remove it. Step back while the pressure releases. 
5. Finally, check the radiator and add more engine coolant if needed, following the procedures noted above. Reinstall the radiator cap securely, when finished.
6. If more engine coolant is necessary, fill the overflow reservoir to the appropriate level marked on the bottle..."